p1518 electronic throttle module to pcm communication
P1163 HO2S Bank 2 Sensor 3 Lean System or Low Voltage DTC P1518 sets when there is a short to B+ on the TAC module ground circuit. Remove the cover from the underhood electrical center. DTC P1643 Engine Speed Output Circuit P1358 IC Output High/Pulse Detected when GND_Cyl. "Reduced Power" or "Limp Mode" which is designed to get the car where it is My Mother's Suv Is A 1500 Z71. Does the DMM indicate voltage within the specified values for both circuits? P1442 EVAP Vacuum Sw. High Voltage During Ign. P1460 Cooling Fan Control System P1460 Misfire Detected With Low Fuel Level or Do not apply an excessive amount of dielectric lubricant to the connectors (as shown above), hydrolock may result when attempting to mate the connectors. P1518 PCM & TAC module communication detected missing or invalid serial data. DTC P1599 Engine Stall or Near Stall Detected P1315 Ignition Coil 4 Primary Feedback Circuit DTC P1690 ECM Loop Overrun Refer to DTC P1533 A/C Evaporator Temp. P1515 and P2135 are set only when our familiar P1518 is NOT present, which would explain why these two codes hadnt yet appeared. P1278 Accelerator Pedal Position Sensor 1 Circuit High Voltage (adsbygoogle = window.adsbygoogle || []).push({}); The Engine Control Module (ECM) has detected a loss of data or invalid data from the Throttle Actuator Control (TAC), Engine Light ON (or Service Engine Soon Warning Light), P1514 Renault Idle air control solenoid valve signal 3 circuit low input, P1519 Renault Electronic Throttle Module Low Volts Communication Disable, P2797 Suzuki Auxiliary Transmission Fluid Pump Performance, P068A Mercedes-Benz Engine Control Module (ECM) / Powertrain Control Module (PCM) Power Relay De Energized Performance Too Early, P0440 Toyota EVAP Canister Purge Regulator Valve, C1953 Mazda Master Cylinder Pressure Sensor Circuit Open, P2119 Mercedes-Benz Throttle Actuator Control Throttle Body Range/Performance. DTC P1588 Cruise Control Clutch Control Circuit High Powered by Invision Community, Silikhan Publishing Group, llc & SilveradoSS.com. P1669 ABS Unit Expected P1670 Driver 4P1671 Driver 4 Line 1P1672 Low Engine Oil Level Lamp Control Circuit Two DTCs appeared: P1515 (variation between commanded and actual throttle position) and P2135 (TP2 disagrees with TP1 by more than 7.5%). Before I found this sliced hose my car was shaking very bad. P1547 A/C System Performance Degraded P1548 A/C Recirculation Circuit P1554 Cruise Control Feedback Circuit P1555 Electronic Variable Orifice Output Circuit Testing Code P1518 GMC Possible Causes Dead or weak battery Faulty Throttle Actuator Control (TAC) module Throttle Actuator Control (TAC) module harness is ope or shorted Throttle Actuator Control (TAC) module circuit poor electrical connection Check Throttle Actuator Control (TAC) module connector for water I took it to the dealer and they said they have never se. DTC P1558 Cruise Control Servo Indicates Low DTC P1673 Engine Hot Lamp Control Circuit P1527 Transmission Range to Pressure Switch Correlation All content 2004-2023 OBD-Codes.com. We know that the voltage drop across a fixed resistance will increase in direct proportion to amperage flow. P1159 HO2S Cross Counts Bank 2 Sensor 2 P1161 HO2S Heater Control Circuit Bank 2 Sensor 2 DTC P1600 TCM Internal Watchdog Operation DTC P1525 Throttle Body Service Required P1117 Engine Coolant Temp. P1622 Cylinder SelectP1623 Transmission Temp Pull-Up Resistor P1368 IC Cylinder 8 Not Toggling After Enable DTC P1646 Evaporative Emission (EVAP) Vent Solenoid Control Circuit When you purchase through links on our site, we may earn an affiliate commission, which supports our community. DTC P1582 Cruise Direction Circuit Low Voltage P1271 Accelerator Pedal Position (APP) Sensor 1-2 Correlation What are the common causes of code P1518? The second Diagnostic Dilemma occurred when the Yukon returned in January 2015 with a loss-of-power complaint with another P1518 recorded. Test the TAC side of the fuse terminal for continuity to ground with a DMM. My Aux Ports Front In Back Are Not Working My Wife Was Driving Back From Her Friends House A Couple Hours Away. The numbers below refer to the step numbers on the diagnostic table. JavaScript is disabled. P1214 Injection Pump Timing Offset P1215 Ground Fault Detection Indicated P1216 Fuel Solenoid Response Time Too Short Upload or insert images from URL. P1524 Throttle Closed Position Performance P1609 Loss Of TCS Serial Data P1610 Loss of PZM Serial Data P1611 Loss of CVRTD Serial Data P1612 Loss of IPM Serial Data P1613 Loss of DIM Serial Data P1614 Loss of RIM Serial Data P1615 Loss of VTD Serial Data P1617 Engine Oil Level Switch Circuit P1619 Engine Oil Life Monitor Reset Circuit The throttle actuator control (TAC) module and the powertrain control module (PCM) communicate via a dedicated serial data circuit. The ignition switch is in the crank or run position. Going back to January, G103 passed a wiggle test. Before it was not that noticeable. Inspect related circuits for being shorted to a B+ supply circuit. P1273 "Accelerator Pedal Position Sensor 1 P1560 Transaxle Not in Drive - Cruise Control Disabled if no failures are reported by this or any other emission related diagnostic. P1655 EVAP Purge Solenoid Control Circuit Are there any DTCs that have not been diagnosed? P1380 Misfire Detected - Rough Road Data Not Available Additionally, there were random U1000 codes, ABS codes, etc. In fact way too many people have posted on this subject. DTC P1636 PCM Stack Overrun I took my vehicle in to get checked last month cause the check engine light was on. An inspection of the fuses may lead you to the circuit that is shorted to the TAC module ground circuit. Not sure where you got the code info from but appears that its incorrect? P1813 Torque ControlP1814 Torque Converter Overstressed P1815 Transmission Range Switch - Start In Wrong Range 2 DTC P1530 Throttle Actuator Control (TAC) Module Internal Circuit Since you replaced the throttle position sensor and it didn't fix the problem, you may have an issue with the TAC module, the PCM, or the wiring and connectors. DTC P1517 Electronic Throttle Module After removing G105, I found the block surface coated with heavy black paint and the threads of the retaining bolt heavily corroded. I just put in a new alternator and now when I turn on the air conditioning I lose rpm's and it will shut off when I am at a stoplight or in idle. DTC P1501 Vehicle Speed Sensor Circuit Intermittent. At 167,000 miles on the odometer and with no other symptoms, the shop (and rightly so, in my experience) installed a new ignition switch. Disconnect the throttle actuator motor harness connector. P1155 HO2S Lean Mean Bank 2 Sensor 1 P1156 HO2S Rich Mean Bank 2 Sensor 1 P1157 HO2S Bank 2 Sensor 2 Lean System or Low Voltage P1353 IC Output High/Pulse Detected when GND_Cyl. DTC P1586 Cruise Control Brake Switch 2 Circuit DTC P1622 Cylinder Select There is a small hose that sits under the Votec Box. P1260 Last Test Failed Failed SCC ENTER:More Info. Looking at G105 through a mechanics mirror, G105 appeared to be in perfect condition. After measuring charging voltage at the battery, it was clear that the BCM voltage was correct and the ECM voltage was incorrect. P1540 Air Conditioning (A/C) Refrigerant Overpressure - Air DTC P1629 Theft Deterrent System - Cranking Signal P1874 TCC Stator Temp. An improperly torqued TAC module ground may be at fault. It is a common failure, but the vehicle has over 78,000 on it. P1570 Traction Control Active - Cruise Control Disabled She Was Driving And As She Was Accelerating The Car Just Stopped. P1673 Engine Hot Lamp Control Circuit P1674 Tachometer Control Circuit P1675 EVAP Vent Solenoid Control Circuit Test for a short between both serial data circuits and all other circuits at the PCM and TAC module harness connectors with a DMM. P1518 CHEVROLET - Electronic Throttle Module to PCM Communication Condition/Concern: Customers may have a concern of lack of power and engine light on. P1602 Knock Sensor (KS) Module Performance Or it could be the idle air control valve, if most of the trouble is at idle and take off. This happened quite awhile ago but stopped now it seems to do it every day. Most ECM diagnostics involve the process of elimination. DTC P1570 Traction Control Active - Cruise Control Disabled DTC P1669 ABS Unit Expected DTC P1623 Transmission Temp Pull-Up Resistor P1450 Barometric Pressure Sensor Circuit PerformanceP1405 Exhaust Gas Recirculation System Valve 3 P1365 IC Cylinder 5 Not Toggling After Enable P1517 Electronic Throttle Module P1518 Electronic Throttle Module to PCM Communication P1519 Throttle Actuator Control (TAC) Module Internal Circuit P1520 Transmission Range Switch Circuit P1521 Transmission Engaged at High Throttle Angle P1522 Park/Neutral to Drive/Reverse at High RPM Lets take a different perspective on the ability of a single ground connection to influence engine performance. DTC P1603 Loss of SDM Serial Data P1480 Cooling Fan 1 Control Circuit High Grimes, from the research I was able to do, this problem appears to have two primary causes: the throttle body connector/wiring, and the throttle body ground (G103). For a better experience, please enable JavaScript in your browser before proceeding. Of course, the accessibility of grounds G103 and G104 is made difficult by a fiber/metallic heat shield wedged between the engine and body. cruise, brake. P1608 Serial Communication Problem With Device 8 DTC P1630 Theft Deterrent Learn Mode Active Refer to. make a purchase, we may earn a small commission. Repairing Connector Terminals Included among the diagnostic trouble codes was the now-familiar P1518. P1398 Wheel Speed Sensor 2 - G - Sensor Circuit High Voltage DTC P1501 Vehicle Speed Sensor Circuit Intermittent Fortunately for us, the Yukon went into Reduced Power mode before leaving the parking lot on its first test drive. Hello, I have a big problem. This should fix your problem. The Ecm B Fuse Keeps Blowing And I Saw That Some One Had A Similar Problem Back In 2011. P1362 IC Cylinder 2 Not Toggling After Enable - The April Digital Edition Is Available Today, The February Digital Edition Is Free To Download, Read, The January Digital Edition Is Available To Download, Read, Alternator Testing For No Charge Conditions. P1518 CHEVROLET - Electronic Throttle Module to PCM Communication Condition/Concern: Customers may have a concern of lack of power and engine light on. P1845 2-3 Shift Solenoid Circuit Low Voltage I have to admit, though, few of the instances reported had the same set of symptoms as mine! DTC P1531 A/C Low Side Temperature Sensor Fault P1569 Cruise Servo Stroke High While not in Cruise By now, I had collected a thick folder of case studies and diagnostic information on the Yukon and the P1518 DTC. DTC P1635 5 Volt Reference Circuit DTC P1686 Driver 5 Line 6 The Throttle Actuator Control (TAC) module contains data which is essential for proper TAC operation. It is bolted to the throttle body, is the service engine light coming on? P1335 CKP Circuit in Wiring Systems. Complaint: An intermittent no-crank/no-start condition along with an intermittent malfunction indicator lamp and service message(s) being displayed. not fail. Long story short, and despite the codes being cleared and B- being disconnected, P1518 had vanished and the TAC was going into limp mode each time the ignition was turned on. P1875 4WD Low Switch Circuit Electrical P1884 TCC Enable/Shift Light Circuit P1886 Shift Timing Solenoid P1887 TCC Release Switch Circuit P1890 ECM Data Input Circuit P1890 Throttle Position Signal Input P1891 Throttle Position Sensor PWM Signal Low DTC P1654 Cruise Control Inhibit Output Circuit DTC P1633 Ignition 0 Switch Circuit DTC P1676 Driver 4 Line 6 A Couple Of Months Ago When My Mother First Bought It The Fuel Pump Went Out. ActiveP1580 Cruise Move Circuit Low Voltage P1581 Cruise Move Circuit High Voltage P1582 Cruise Direction Circuit Low Voltage DTC P1583 Cruise Direction Circuit High Voltage Refer to DTC P1640 Driver-1-Input High Voltage P1543 A/C System Performance P1544 A/C Refrigerant Condition Very Low P1300 Ignitor Circuit DTC P1628 ECT Pull-Up Resistor Accurate transmitting and receiving Plugged the scanner in and got a P1518 code: "Electronic Throttle Module to PCM Communication". [PCM] P1518 - Electronic Throttle Module to PCM Communication (SES) (Pending) (History) (Current) (Immature) I believe this is cause the PCM was from an 02 Escalade and it had the electronic throttle body. Perhaps due to the new ECM having the latest calibrations installed, the Reduced Power mode became a hard failure, which was cured by cleaning ground G105. Refer to, Test both TAC motor circuits for a short to voltage. G103 is vulnerable to engine vibration and is a pattern failure. HighP1420 Intake Air Low Pressure Switch Circuit Low Voltage So, the question will always be, How much voltage drop will a particular module tolerate before it fails or sets a code?. P1391 Wheel Speed Sensor 1 - G - Sensor Circuit Performance The technician may not be able to duplicate the intermittent condition. Throttle Actuator Control (TAC) Module Replacement I can send you the diagnostic flow charts and connector end views for the code P1518, but you will need an advanced scan tool and a DMM to follow the steps. P1345 Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation Go to P1139 HO2S Insuff. P1346 Intake Camshaft Position [CMP] Sensor System Performance The TB now loses power and (Reduced Engine Power) light comes on. P1245 Intake Plenum Switchover Valve P1250 Early Fuel Evaporation Heater Circuit Disconnect the TAC module 16-way connector. P1336 Crankshaft Position (CKP) System Variation Not Learned P1528 GovernorP1529 Heated Windshield Request Problem P1530 Throttle Actuator Control (TAC) Module Internal Circuit DTC P1566 Engine RPM Too High - Cruise Control Disabled Many alternator problems turn out to be nothing more than a bad connection at the alternator or a bad wiring harness. P1432 Fuel Level Sensor 2 Circuit Low Voltage . Hello seen this post and have a similar problem with my 02 Yukon Denali engine code is P1518 but can keep engine running when I get a jump its good for about 3-5 sec then sputters and stalls checked the ground on the back of the engine seems to be connected well not sure what else to be looking for any hep would greatly appreciated. According to the 99-06 2wd/4wd Emissions chart that I have, P1518 Is Throttle actuator control, invalid or missing data, P1517 goes along with it but states that the throttle failed internal data test. var prefix = 'mailto'; The Throttle Actuator Control (TAC) module contains data which is essential for proper TAC operation. Intermittent High VoltageP1116 ECT Signal Unstable or Intermittent Important:If the Driver Information Center is displaying Reduced Engine Power, go to step 6. But I had to pull the proverbial rabbit out of the diagnostic hat, so I began by loosening the retainer bolt on G105, which, in this case, turned out to be barely snug. The control module stores this information in the Freeze Frame and/or the Failure But, making more power with less displacement puts more stress on the engine. This serial data circuit is separate from any other serial data circuit on the vehicle. Test for poor connections at the TAC module harness connector. If the PCM detects a loss of data or invalid data, this DTC An improperly torqued TAC module ground may be at fault. Due To Unhooking The Battery To Fix The Radio. P1804 Ground Control Relay P1810 TFP Valve Position Switch Circuit P1811 Maximum Adapt and Long Shift P1812 Transmission Over Temperature Condition Well they looked at it and they replaced the coolant and housing (I am not exactly sure what this means I am copying this off the bill) and the did a fuel injection service and throttle body service. And Then There;s A Note That Say Reduced Engine Power. P1795 CAN Bus - Throttle Body Position P1800 TCM Power Relay Control Circuit P1801 Performance Selector Switch Failure Go to The ignition voltage is more than 5.23volts. Ckt. P1212 Mass Air Flow Circuit Intermittent Low The vehicle warranty is only good to 36,000. Immediately after delivery, I discovered a clean diagnostic memory in all modules, which was especially odd since 40 engine warm-up cycles are required to erase the ever-present P1518. DTC P1521 Transmission Engaged at High Throttle Angle P1820 Internal Mode Switch Circuit A Low P1546 A/C Clutch Status Circuit Low Voltage I do not believe it is the transmission because it shifts fine when your easy on the gas. (If I had to do that test again, I would have used a larger-amperage lamp and measured the ECMs amperage flow with the engine running at the ECMs G103 ground.) P1518 Renault Description. Circuit Testing P1115 Engine Coolant Temperature (ECT) Sensor Circuit This serial data circuit is separate from any other serial data circuit on the vehicle. DTC P1672 Low Engine Oil Level Lamp Control Circuit Jan 7, 2009. PCM. ) What needs to be done is to have the computer scanned to determine what trouble codes are stored in the computer. P1603 Loss of SDM Serial Data P1604 Loss of IPC Serial Data P1605 Loss of HVAC Serial Data P1606 Serial Communication Problem With Device 6 DTC P1524 Throttle Closed Position Performance P1283 Accelerator Pedal Position Sensor 2 Circuit High Voltage P1277 Accelerator Pedal Position Sensor 1 Circuit Low Voltage Engine remains on, but no power. P1689 - No Communication Between ECM and Injection Pump Module P1690 - Fuel injection pump crankshaft position sensor Does Not Agree With ECM crankshaft position Sensor The TAC module stays powered-up when the ignition switch is turned OFF. Refer to. Turn ON the ignition, with the engine OFF, Test for a short to voltage at both throttle actuator motor control circuits with a DMM. Low Voltage P1188 EOT Sensor Ckt. DTC P1645 Evaporative Emission (EVAP) Vent Solenoid Control Circuit GM TSB: Fretting on Connector Causes ON/DTCs Set By Various Control Modules, Models: 2011 and prior GM passenger cars and trucks. Display as a link instead, So, how could cleaning the engine block ground solve the P1515 and P2135 DTCs and the Reduced Power mode? Inspect the TAC module power and ground circuits and the TAC module/PCM serial data circuits for intermittent connections. P1817 TFP Valve Position Sw. - Reverse With Drive Ratio Refer to, Test the TAC module ignition feed circuit for an open or high resistance with a DMM. Sensor Performance When the TAC module is unable to write or read data to and from random access memory (RAM), or the TAC module is unable to correctly read data from the flash memory or and internal TAC module processor fault is detected and the Detected Trouble Code (DTC) is set. VoltageP1125 APP SystemP1130 HO2S Circuit Low Variance Bank 1 Sensor 1 P1220 Throttle Position (TP) Sensor 2 Circuit P1393 Wheel Speed Sensor 1 - G - Sensor Circuit High Voltage An improperly torqued TAC module ground may be at fault. Depending on the polarity of the throttle actuator motor transistors, this DTC may not set with a fault in the I noticed at 36% throttle, P1518 sets and then goes into limp mode. DTC P1575 Extended Travel Brake Switch Circuit I Put A 25 Or 30 Amp Fuse And It Blows. DTCs set will almost always contain a P1518 and may contain any of the following (P1516, P2108, P0220, P0120, U0107). P1600 TCM Internal Watchdog Operation P1601 Serial Comm. Diagnostic Trouble Code (DTC) List, Powertrain Control Module (PCM) Connector End Views, Diagnostic System Check - Engine Controls, DTC P0601-P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610, Testing for Intermittent Conditions and Poor Connections, Throttle Actuator Control (TAC) Module Replacement, Powertrain Control Module (PCM) Replacement. P1853 Brake Band Apply Solenoid High Voltage Test for a short to voltage on both serial data circuits at the TAC module 16-way connector with a DMM. So After Cleaning The Throttle Body Electrical Problem On low current signal circuits, this condition may cause high resistance, resulting in intermittent connections. It is not throwing any check engine lights. DTC P1656 Driver 2 Line 6 Will Chevrolet stand by their car when I know I am not the only one to experience exactly this problem? Mechanical problem with the intake manifold or linkage Failed IMRC actuator Wiring problems Faulty PCM What are the symptoms of code P1518? P1816 TFP Valve Position Sw. - Park/Neu. P1624 Customer Snapshot Requested - Data Available DTC P1625 TCM System Reset P1645 Evaporative Emission (EVAP) Vent Solenoid Contorl Circuit DTC P1548 A/C Recirculation Circuit P1620 Low Coolant Circuit P1621 Control Module Long Term Memory Performance Have the codes read? P1451 Barometric Press. P1852 Brake Band Apply SolenoidLow Voltage A current DTC, Last Test Failed, clears when the diagnostic runs DTC P1695 Remote Keyless Entry Circuit Low It https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing, https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump, https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator. DTC P1540 Air Conditioning (A/C) Refrigerant Overpressure - Air Conditioning (A/C) The extra stress has caused engines to evolve and experience problems like carbon deposits. DTC P1515 Electronic Throttle System Throttle Position DTC P1518 Throttle Actuator Control (TAC) Module Serial Data Circuit. P1567 Active Banking Control Active - Cruise Control Disabled P1545 Air Conditioning (A/C) Clutch Relay Control Circuit I am not sure what the problem is. The control module records the operating conditions at the time the diagnostic The car will not start now. The throttle actuator control (TAC) module and the powertrain control module (PCM) communicate via a dedicated serial data circuit. DTC P1532 A/C Evaporator Temp. P1225 Injector Circuit Cylinder 2 Intermittent P1270 Accelerator Pedal Position Sensor A/D Converter Error DTC P1572 ASR Active Circuit Low Too Long P1203 (Alt. Fuel) Gas Mass Sensor Circuit Range/Performance in Wiring Systems. An inspection of the fuses may lead you to the circuit that is shorted to the TAC module ground circuit. P1158 HO2S Bank 2 Sensor 2 Rich or High Voltage Remember this if you review the stored information in Capture Info. A forum community dedicated to all General Motors truck owners and enthusiasts. P1360 Ignition Coil Group 2 Control Circuit Please help me if you can with my problem and help me avoid being taken advantage of again I am on a very tight budget and I miss driving my car. P1364 IC Cylinder 4 Not Toggling After Enable The answer lies in Ohms Law. DTC P1571 Traction Control Torque Request Circuit There are other codes that would show up if the ECM or throttle module themselves were bad. Use only a clean nylon brush that is dedicated to the repair of the conditions. Both of these potential culprits could be easily attributable to the engine recently being swapped. var icon = '' When my truck is wot some times it will shut down and says reduced engin power.I scand it and three fault codes came up .1. p1516 electronic throttle module tp 2. p1518 electronic throttle module to pcm communication 3. p2108 unknown fault. This could be a dirty connector or a frayed wire. DTC P1535 A/C High Side Temperature Sensor Circuit Mistakes made can result in costly comebacks. P1280 Accelerator Pedal Position (APP) Sensor 2 Circuit Disconnect the throttle actuator control (TAC) module connectors. Sens. DTC P1653 Oil Level Lamp Control Circuit P1518 CHEVROLET - Electronic Throttle Module to PCM Communication Condition/Concern: Customers may have a concern of lack of power and engine light on. Once the PCM finally comes online and communicates with the TAC module, it logs the P1518 and displays reduced power. It is not intended as repair advice and we are not responsible for any actions Sens. P1134 HO2S Transition Time Ratio Bank 1 Sensor 1 P1403 Exhaust Gas Recirculation System Valve 1 High Voltage P1189 Engine Oil Pressure (EOP) Switch Circuit A history DTC clears after 40consecutive warm-up cycles, Includes diagnostic enhancements for P1518." Ckt. Thank you in advance for your help. DTC P1620 Low Coolant Circuit 'Contact\u0020us' + ''); P1504 Vehicle Speed Output Circuit P1508 Idle Speed Low - Idle Air Control (IAC) System Not On the negative side, the Yukon was now in a hard-failure Reduced Power mode, and the P1515 and P2135 codes are now repeatable DTCs. The ECM and the TAC module are linked via a dedicated class 2 bus wire, which might explain the Reduced Power complaint and the P1518 DTC. The loss-of-power complaint couldnt be duplicated so, to cover our bases, we voltage-dropped all powers and grounds and cleaned the throttle plate and body. Heres how oil can influence carbon deposits. Servicing GM Autoride Rear Air Suspension. DTC P1563 Cruise Vehicle Speed/Set Speed Difference Too High 7 Intermittent Low Voltage DTC P1639 5 Volt Reference 2 Circuit You may have a vacuum leak, get a can of spray Gumout, spray the vacuum lines and manifold area, when the idle changes, you have found the leak! Test both serial data circuits at the TAC module 16-way connector for a short to ground with a DMM. . and passes. Inspect the fuses for the circuits that are in the TAC module harness-i.E. DTC P1691 Coolant Gage Circuit Low Voltage Does the DMM indicate voltage on both circuits above the specified value? DTC P1615 Loss of VTD Serial Data My stereo system, e fans and ac are killin it.When I shut evry thing off there is no codes. Thanks for this post. If TAC related repair has been done, clear DTC & recheck system. DTC P1637 Generator L-Terminal Circuit P1519 Throttle Actuator Control (TAC) Module Internal Circuit P1185 Engine Oil Temperature Circuit P1186 EOT Circuit Performance P1187 EOT Sensor Ckt. Low Voltage var name = 'webmaster'; DTC P1576 BBV Sensor Ckt. P1119 ECT Signal Out-Of-Range With TFT Sensor DTC P1516 Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance DTC P1547 A/C System Performance Degraded P1518 CHEVROLET - Electronic Throttle Module to PCM Communication Condition/Concern: Customers may have a concern of lack of power and engine light on. If the customer's concern is slow cranking or no crank because battery voltage is low, ignore DTCP1518. P1518 Electronic Throttle Module to PCM Communication; P1519 Throttle Actuator Control (TAC) Module Internal Circuit; . P1519 Renault Electronic . P1433 Fuel Level Sensor 2 Circuit High Voltage P1404 Exhaust Gas Recirculation (EGR) Closed Position P1131 HO2S Circuit Low Variance Bank 1 Sensor 2 DTCs set will almost always contain a P1518 and may contain any of the following (P1516, P2108, P0220, P0120, U0107). If this DTC does not fail this ignition, continue to DTC P1534 A/C High Side Temp. 03 2500hd 2wd auto 6.0 litre. Its anybodys guess. P1202 (Alt. I bought it two months ago used from a dealer. that were indicative of a bad ground. PCM. Lets look at a ground distribution chart for the answer. P1558 Cruise Control Servo Indicates Low P1367 IC Cylinder 7 Not Toggling After Enable Test the TAC side of the fuse terminal for a short to ground with a DMM. The TAC module and the PCM communicate via a dedicated serial data circuit. ECM diagnostics can be a challenge because you often find yourself working after the fact. DTC P1604 Loss of IPC Serial Data DTC P1500 Starter Signal Circuit. DTC P1518 sets when there is a short to B+ on the TAC module ground circuit. DTC P1502 Theft Deterrent Fuel Enable Signal Not Received. The Throttle Actuator Control (TAC) module contains data which is essential for proper TAC operation. DTC P1555 Electronic Variable Orifice Output sets. DisabledP1537 A/C Request Circuit Low Voltage P1538 A/C Request Circuit High Voltage P1539 A/C Clutch Status Circuit High Voltage But, the logic is simple: the ECM commands the starter relay to crank the engine and, with the exception of the voltmeter being sourced from the ignition switch, the operating information displayed on the instrument cluster is relayed to the cluster via a data bus from the ECM. It sounds like a bad fan clutch on the engine. P1653 Oil Level Lamp Control Circuit P1654 Cruise Control Inhibit Output Circuit P1518 Citroen Description. It is always a good idea to purchase a good extended warranty on any new vehicle you plan on keeping past the original warranty period. My truck was riding fine on a trip suddenly we started to lose power. onto the 3 Months Ago We Replaced The #2 Coil. Inspect the fuses for the circuits that are in the TAC module harness--i.e. I sure hope so. P1145 HO2S Cross Counts Bank 1 Sensor 3 P1153 HO2S Insufficient Switching Bank 2 Sensor 1 DTC P1634 Ignition 1 Switch Circuit Knock sensors are mounted on the block near the base of the cylinder head. DTC P1546 A/C Clutch Status Circuit Low Voltage any help would be appreciated. DTC P1662 Cruise Lamp Control Circuit What happens after it runds good? Engine Controls Connector End Views DTC P1520 Transmission Range Switch Circuit Using a small battery-powered Dremel tool with a miniature wire brush, I carefully buffed the paint off the block and cleaned the retaining bolt threads. DTC P1501 Theft Deterrent System. DTC P1650 Control Module Output B Circuit And, we also know that accessory load across a fixed resistance can be a major variable. Low Vacuum P1579 P/N to D/R at High Throttle Angle - Power Reduction Mode If the PCM detects a communication error, DTC P1518 sets. Cruise, brake. P1522 Park/Neutral to Drive/Reverse at High RPM Clear editor. P1288 Accelerator Pedal Position Sensor 3 Circuit High Voltage When the ignition switch is turned ON, the TAC module is powered-up before the DTC P1503 Theft Deterrent Fuel Enable Signal Not Correct '?subject=' + subject + DTC P1614 Loss of RIM Serial Data Operate the vehicle within the Conditions for Running the DTC. RespondingP1509 Idle Speed High - Idle Air Control (IAC) System Not DTC P1504 Vehicle Speed Output Circuit. It is very slow to accelerate much much worse than it was before.