But, I also noticed among the data anomalies a 12.0- to 13.0-volt reading on the ECM engine data stream, which conflicted with a 13.5-volt reading on the Body Control Module (BCM) data stream. It is on the left hand side, on the bottom and in the front but right under the Vortec box. 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. DTC P1655 EVAP Purge Solenoid Control Circuit P1357 IC Output High/Pulse Detected when GND_Cyl. make sure starting system & charging system are functioning properly. P1518 Electronic Throttle Module to PCM Communication; P1519 Throttle Actuator Control (TAC) Module Internal Circuit; . What could this be? Low Voltage The TAC module and the PCM communicate via a dedicated serial data circuit. I bought it two months ago used from a dealer. to the TAC module ground circuit. 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. P1518 CHEVROLET - Electronic Throttle Module to PCM Communication Condition/Concern: Customers may have a concern of lack of power and engine light on. Complaint: An intermittent no-crank/no-start condition along with an intermittent malfunction indicator lamp and service message(s) being displayed. DTC P1676 Driver 4 Line 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. On the positive side, the long-standing P1518 DTC had not set since the ECM had been replaced. DTC P1558 Cruise Control Servo Indicates Low Engine Controls Connector End Views Condition/Concern: Customers may have a concern of lack of power and engine light on. Wow, thank you so much. Both of these potential culprits could be easily attributable to the engine recently being swapped. P1272 Accelerator Pedal Position Sensor 2 For a better experience, please enable JavaScript in your browser before proceeding. P1221 Fuel Pump Secondary Circuit Low P1222 Injector Control Circuit Intermittent P1519 Citroen Electronic . DTC P1619 Engine Oil Life Monitor Reset Circuit Thanks, I Am Only Able To Drive 20-30 Mph. DTC CODES - P1500-P1700. P1225 Injector Circuit Cylinder 2 Intermittent DTC P1518 Electronic Throttle Module to PCM Communication P1113 Intake Resonance Switchover Solenoid Control Circuit Paste as plain text instead, Records. Test for a short to voltage on both serial data circuits at the TAC module 16-way connector with a DMM. P1864 Torque Converter Clutch Circuit P1868 Transmission Fluid Life P1870 Transmission Component Slipping P1871 Undefined Gear Ratio P1873 TCC Stator Temp. DTC P1633 Ignition 0 Switch Circuit Inspect the fuses for the circuits that are in the TAC module harness--i.e. Most ECM diagnostics involve the process of elimination. P1518 CHEVROLET - Electronic Throttle Module to PCM Communication Condition/Concern: Customers may have a concern of lack of power and engine light on. The accelerator assembly, control unit above it on a bracket, and the assemble that sits on top of the throttle body. But, since the data stream anomalies continued to bother me, we used a back-up lamp drawing 2.5 amps of current to load the circuits. DTC P1601 Serial Communication Problem With Device 1 The power your car's engine is producing is important. DTC P1656 Driver 2 Line 6 DTC P1501 Theft Deterrent System. DTC P1610 Loss of PZM Serial Data 2 The motor is MAFless and O2 sensorless. Put a charger on and heard a pop.Bought new batterie and started blowing the etc/ecm fuse.After wigglig wires arround the fuse stoped blowing but still can get anything out of the gas peddle.Did a dianostics check and came up electronic throttle module to pcm communication P1518.Need help P1399 Wheel Speed Sensor 2 - G - Sensor Circuit Intermittent DTC P1544 A/C Refrigerant Condition Very Low Similarly, the TAC module shares G104 at the rear of the left cylinder head with the fuel composition sensor, A/C low pressure switch, A/C compressor clutch, coolant level switch, and under-hood fuse box. Sens. 1 DTC. P1517 - Electronic Throttle Module P1518 - Electronic Throttle Module to PCM Communication P1519 - Throttle Actuator Control (TAC) Module Internal Circuit I have now replaced all three throttle related items on my engine. DTC P1510 Throttle Control System Performance - Throttle Limitation Active P1633 Ignition 0 Switch Circuit P1634 Ignition 1 Switch Circuit P1635 5 Volt Reference Circuit P1636 PCM Stack Overrun P1637 Generator L-Terminal Circuit P1638 Generator F-Terminal Circuit P1639 5 Volt Reference 2 Circuit P1640 Driver-1-Input High Voltage P1641 Malfunction Indicator Lamp (MIL) Control Circuit Monitor the diagnostic trouble code (DTC) Info option using the scan tool. Drives fine on level ground, but when accelerate uphill, loses power. DTC P1559 Cruise Control Power Management Mode Finally, at this point in the diagnosis, replacing the ECM appeared to be a cheaper option than spending countless diagnostic hours chasing ghost trouble codes. DTC P1632 Theft Deterrent Fuel Disable Signal Received in Wiring Systems. - DTC P1518 sets when there is a short to B+ on the TAC module ground circuit. The car will not start now. cruise, brake. Are there any DTCs that have not been diagnosed? Refer to Obviously, a number of strands were broken, but when did the number of broken strands reach a critical point? DTC P1609 Loss Of TCS Serial Data Jan 7, 2009. P1281 Accelerator Pedal Position Sensor 2 Circuit Performance Fuel) Gas Mass Sensor Circuit Low Frequency or . 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. P1355 IC Output High/Pulse Detected when GND_Cyl. DTC P1684 Driver 5 Line 4 Does the scan tool indicate this DTC failed this ignition? Any ideas? P1560 Transaxle Not in Drive - Cruise Control Disabled P1135 HO2S Lean Mean Bank 1 Sensor 1 P1136 HO2S Rich Mean Bank 1 Sensor 1 P1137 HO2S Bank 1 Sensor 2 Lean System or Low Voltage Fuel) Gas Mass Sensor Circuit High Frequency 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. Sensor Performance P1518 Renault Throttle Actuator Control Module Performance. DTC P1607 Serial Communication Problem With Device 7 P1780 Park/Neutral Position [PNP] Switch Circuit P1831 PC Solenoid Power Circuit - Low Voltage DTC P1548 A/C Recirculation Circuit 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. ActiveP1580 Cruise Move Circuit Low Voltage P1581 Cruise Move Circuit High Voltage P1582 Cruise Direction Circuit Low Voltage P1517 Electronic Throttle Module P1518 Electronic Throttle Module to PCM Communication P1519 Throttle Actuator Control (TAC) Module Internal Circuit . Observe the Capture Info with a scan tool. The Throttle Actuator Control (TAC) module contains data which is essential for proper TAC operation. On P1518 CHEVROLET - Electronic Throttle Module to PCM Communication Condition/Concern: Customers may have a concern of lack of power and engine light on. make a purchase, we may earn a small commission. (Merged). P1371 IC 4X Reference Circuit Too Few Pulses P1874 TCC Stator Temp. DTC P1588 Cruise Control Clutch Control Circuit High Knock sensors are mounted on the block near the base of the cylinder head. 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. This step determines if the ignition relay is supplying a voltage to the ETC/ECM fuse. Throttle Actuator Control (TAC) Module Replacement have also checked throttle body truck has new engine and new sensors. Disconnect the TAC module 16-way harness connector. DTC P1522 Park/Neutral to Drive/Reverse at High RPM (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.) P1892 Throttle Position Sensor PWM Signal High 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 throttle actuator motor is a bi-directional DC motor. DTCs set will almost always contain a P1518 and may contain any of the following (P1516, P2108, P0220, P0120, U0107). P1571 Traction Control Torque Request Circuit P1504 Vehicle Speed Output Circuit P1508 Idle Speed Low - Idle Air Control (IAC) System Not ", if this is the correct display, you need to check any/all of the cooling system features and components. 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. You must log in or register to reply here. P1322 EI System or Ignition Control Extra or Missing DTC P1667 Reverse Inhibit Solenoid Control Circuit P1442 EVAP Vacuum Sw. High Voltage During Ign. DTC P1623 Transmission Temp Pull-Up Resistor Diagnostic System Check - Engine Controls. P1518 Renault Description. After bringing the Yukon into the shop, we couldnt duplicate the loss-of-power complaint. P1844 Torque Reduction Signal Circuit Desired By TCM P1163 HO2S Bank 2 Sensor 3 Lean System or Low Voltage Sensor Low Voltage P1376 Ignition Ground Circuit P1377 IC Cam Pulse To 4X Reference Pulse have also checked throttle body truck has new engine and new sensors. Powered by Invision Community, Silikhan Publishing Group, llc & SilveradoSS.com. Here are 11 steps to help clean any cars engine compartment. P1243 Injector Circuit Cylinder 8 Intermittent So, to paraphrase the immortal words of Yogi Berra, we reached a fork in the road and we took it by replacing the ECM. P1403 Exhaust Gas Recirculation System Valve 1 Ground connection G103, behind the passenger side cylinder head, was not even finger tight! Most parts stores will do it for free; however, since you cannot drive it, that is a problem. We also applied Stabilant-22 to enhance the electrical conductivity of the Throttle Activation Control (TAC) module and throttle body connector pins. The numbers below refer to the step numbers on the diagnostic table. Testing for Intermittent Conditions and Poor Connections Upload or insert images from URL. DTC P1662 Cruise Lamp Control Circuit P1423 Intake Air High Pressure Switch Circuit High Voltage Clear any DTCs from memory that may have set from the low battery voltage condition. P1673 Engine Hot Lamp Control Circuit P1674 Tachometer Control Circuit P1675 EVAP Vent Solenoid Control Circuit The vehicle warranty is only good to 36,000. P1212 Mass Air Flow Circuit Intermittent Low When you step on the gas DTC P1535 A/C High Side Temperature Sensor Circuit There is a small hose that sits under the Votec Box. DTC, Description P1108 BARO to MAP Sensor Comparison Too High Okay, that is the crankcase vent for the PCV system and it can easily cause a misfire because it pulls in air that the computer does not "see" with its sensors. P1599 Engine Stall or Near Stall Detected I am not sure what the problem is. P1107 Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent Low Voltage Beauty is more than skin deep. 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. Of course, the accessibility of grounds G103 and G104 is made difficult by a fiber/metallic heat shield wedged between the engine and body. P1660 Cooling Fan Control Circuits P1661 MIL Control Circuit P1662 Cruise Lamp Control Circuit P1663 Oil Life Lamp Control Circuit P1664 1-4 Upshift Lamp Control Circuit P1665 Driver 3 Line 5P1666 Driver 3 Line 6P1667 Reverse Inhibit Solenoid Control Circuit The PCM is lagging several seconds to come online, so the TAC module stores a code P1518. Replace the PCM. Go to Due To Unhooking The Battery To Fix The Radio. [PCM] P1571 - Traction Control Torque Request Circuit (Pending) (Old) (History) (Current) (Immature) Intermittent High VoltageP1116 ECT Signal Unstable or Intermittent DTCP1518 sets when there is a short to B+ on the TAC module ground circuit. For a better experience, please enable JavaScript in your browser before proceeding. Clear the MIL and the DTC with a scan tool. Includes diagnostic enhancements for P1518." or is the DIC showing "Reduced Engine Power? P1480 Cooling Fan 1 Control Circuit High The TAC module continuously test the integrity of this data. DTC P1509 Idle Speed High - Idle Air Control (IAC) System Not Responding An improperly torqued TAC module ground may be at fault. If water intrusion occurs, multiple DTCs may set without any circuit or component conditions found during diagnostic testing. P1483 Engine Cooling System Performance P1500 Starter Signal Circuit P1501 Theft Deterrent System P1501 Vehicle Speed Sensor Circuit Intermittent Your link has been automatically embedded. '?subject=' + subject + IlluminationP1701 Trans. Switching Bank 1 Sensor 2 You want the engine running and spray on the outside but do direct the stream onto the hoses, if it is a vacuum leak, the engine idle will change speed, then you have detected a leak, repair the vacuum leak and see how it runs! I used a car reader and it said a misfire on number one. P1346 Intake Camshaft Position [CMP] Sensor System Performance Mechanical problem with the intake manifold or linkage Failed IMRC actuator Wiring problems Faulty PCM What are the symptoms of code P1518? P1324 Crank RPM Too Low Remember this if you review the stored information in Capture Info. When the TAC module detects a problem within the TAC system, more than 1 TAC system related DTC may set. 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. P1367 IC Cylinder 7 Not Toggling After Enable P1315 Ignition Coil 4 Primary Feedback Circuit monitor this DTC status while moving related harnesses and connectors. P1518 CHEVROLET - Electronic Throttle Module to PCM Communication Condition/Concern: Customers may have a concern of lack of power and engine light on. DTC P1519 Throttle Actuator Control (TAC) Module Internal Circuit P1273 "Accelerator Pedal Position Sensor 1 The mechanic who installed the motor simply forgot to torque it. As mentioned previously, splice S103 passed testing with a 2.5-amp load. I recently got it running/driving and started tuning the idle and such. DTC P1654 Cruise Control Inhibit Output Circuit Switch Circuit Low High Voltage '"TITLE="Contact\u0020Us" role="menuitem">' + icon + P1120 Throttle Position (TP) Sensor 1 Circuit It is bolted to the throttle body, is the service engine light coming on? DTC P1563 Cruise Vehicle Speed/Set Speed Difference Too High When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 8 P1546 A/C Clutch Status Circuit Low Voltage P1381 Misfire Detected - No Communication with Brake Control Increasing the engine speed to 3,000RPM aids in locating a shorted throttle actuator motor control circuit. To avoid tying up a service bay with more diagnostics, I drove the Yukon in limp mode to my own shop, which allowed me to pursue the diagnosis at a more leisurely pace. P1569 Cruise Servo Stroke High While not in Cruise P1372 Crankshaft Position (CKP) Sensor A-B Correlation P1218 Injection Pump Calibration Circuit P1565 Cruise Servo Position Sensor P1566 Engine RPM Too High - Cruise Control Disabled Refer to A current DTC, Last Test Failed, clears when the diagnostic runs P1245 Intake Plenum Switchover Valve P1250 Early Fuel Evaporation Heater Circuit P1359 Ignition Coil Group 1 Control Circuit DTC P1524 Throttle Closed Position Performance DTC P1620 Low Coolant Circuit DTC P1546 A/C Clutch Status Circuit Low Voltage DTC P1674 Tachometer Control Circuit Wiring Repairs DTC P1638 Generator F-Terminal Circuit The battery negative-to-block ground G105 not only grounds the starter and alternator, it must also ground G103 and G104, which makes it the most critical and most load-sensitive ground on the whole vehicle. P1203 (Alt. P1843 1-2 Shift Solenoid Circuit High Voltage 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