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NAG1 Automatic Transmission - Electrical Diagnostics: Diagnosis Dodge Nitro I

Automatic Trans 2 illustrations ~16200 words

DIAGNOSTIC CODE INDEX

DTCDescription
P0219ENGINE OVERSPEED
P0501VEHICLE SPEED SENSOR 1 PERFORMANCE
P0562BATTERY VOLTAGE LOW
P0563BATTERY VOLTAGE HIGH
P0601INTERNAL MEMORY CHECKSUM INVALID
P0602CONTROL MODULE PROGRAMMING ERROR/NOT PROGRAMMED
P0604INTERNAL CONTROL MODULE RAM
P0605INTERNAL CONTROL MODULE ROM
P0613INTERNAL TRANSMISSION PROCESSOR
P0614ECM/TCM INCOMPATIBLE
P0642SENSOR REFERENCE VOLTAGE 1 CIRCUIT LOW
P0643SENSOR REFERENCE VOLTAGE 1 CIRCUIT HIGH
P0657SOLENOID SUPPLY VOLTAGE CIRCUIT
P0710TRANSMISSION TEMPERATURE SENSOR CIRCUIT
P0712TRANSMISSION TEMPERATURE SENSOR LOW
P0714TRANSMISSION TEMPERATURE SENSOR INTERMITTENT
P0717INPUT SPEED SENSOR 1 CIRCUIT NO SIGNAL
P0730INCORRECT GEAR RATIO
P0731GEAR RATIO ERROR IN 1ST
P0732GEAR RATIO ERROR IN 2ND
P0733GEAR RATIO ERROR IN 3RD
P0734GEAR RATIO ERROR IN 4TH
P0735GEAR RATIO ERROR IN 5TH
P0741TORQUE CONVERTER CLUTCH CIRCUIT PERFORMANCE
P0742TORQUE CONVERTER CLUTCH STUCK ON
P0743TCC SOLENOID CIRCUIT
P0748MODULATOR PRESSURE SOLENOID CIRCUIT
P07521-2/4-5 SOLENOID
P07531-2/4-5 SOLENOID CIRCUIT
P07572-3 SOLENOID
P07582-3 SOLENOID CIRCUIT
P07623-4 SOLENOID
P07633-4 SOLENOID CIRCUIT
P0778SHIFT PRESSURE SOLENOID CIRCUIT
P0817STARTER DISABLE (P/N) CIRCUIT/OPEN
P1629TCM INTERNAL - SOLENOID SUPPLY/WATCHDOG
P1631TCM INTERNAL - PROCESSOR CLOCK PERFORMANCE
P1632TCM INTERNAL - TEST INTERNAL WATCHDOG PERFORMANCE
P1633TCM INTERNAL - TEST EXTERNAL WATCHDOG PERFORMANCE
P1634TCM INTERNAL - INTERNAL WATCHDOG PERFORMANCE
P1636TCM INTERNAL - EXTERNAL WATCHDOG PERFORMANCE
P1637TCM INTERNAL - EEPROM PERFORMANCE
P1638TCM INTERNAL - CAN 1 RAM PERFORMANCE
P1639TCM INTERNAL - CAN 2 RAM PERFORMANCE
P1644INCORRECT VARIANT/CONFIGURATION
P1704INPUT SPEED SENSOR 1 OVERSPEED
P1705INPUT SPEED SENSOR 2 OVERSPEED
P1731INCORRECT GEAR ENGAGED
P2638TORQUE MANAGEMENT FEEDBACK SIGNAL PERFORMANCE
P2767INPUT SPEED SENSOR 2 CIRCUIT NO SIGNAL
P2783TORQUE CONVERTER TEMPERATURE TOO HIGH
P2784INPUT SPEED SENSOR 1/2 CORRELATION
U0002CAN C BUS OFF PERFORMANCE
U0100LOST COMMUNICATION WITH ECM/PCM
U0103LOST COMMUNICATION WITH ELECTRIC GEAR SHIFT MODULE
U0121LOST COMMUNICATION WITH ANTI-LOCK BRAKE MODULE
U0141LOST COMMUNICATION WITH FRONT CONTROL MODULE
U0155LOST COMMUNICATION WITH CLUSTER/CCN
U0164LOST COMMUNICATION WITH HVAC CONTROL MODULE
U0401IMPLAUSIBLE DATA RECEIVED FROM ECM/PCM
U0404IMPLAUSIBLE DATA RECEIVED FROM ESM
U0414IMPLAUSIBLE DATA RECEIVED FROM FDCM
U0415IMPLAUSIBLE DATA RECEIVED FROM ABS
U0423IMPLAUSIBLE DATA RECEIVED FROM CLUSTER/CCN
U0424IMPLAUSIBLE DATA RECEIVED FROM HVAC CONTROL MODULE
U0431IMPLAUSIBLE DATA FROM FCM
U110BLOST ENGINE COOLANT MESSAGE
U1118LOST ENGINE MESSAGE
U1119LOST FCM MESSAGE
U1400IMPLAUSIBLE TPS SIGNAL RECEIVED
U1401IMPLAUSIBLE ENGINE SPEED SIGNAL RECEIVED
U1402IMPLAUSIBLE ENGINE TEMPERATURE SIGNAL RECEIVED
U1404IMPLAUSIBLE STATIC ENGINE TORQUE SIGNAL RECEIVED
U1405IMPLAUSIBLE MINIMUM ENGINE TORQUE SIGNAL RECEIVED
U1406IMPLAUSIBLE MAXIMUM ENGINE TORQUE SIGNAL RECEIVED
U1407IMPLAUSIBLE ENGINE TORQUE REQUEST SIGNAL RECEIVED
U1408IMPLAUSIBLE BRAKE SIGNAL RECEIVED
U1409IMPLAUSIBLE LEFT FRONT WHEEL SPEED SIGNAL RECEIVED
U140AIMPLAUSIBLE RIGHT FRONT WHEEL SPEED SIGNAL RECEIVED
U140BIMPLAUSIBLE LEFT REAR WHEEL SPEED SIGNAL RECEIVED
U140CIMPLAUSIBLE RIGHT REAR WHEEL SPEED SIGNAL RECEIVED
U140DIMPLAUSIBLE WHEEL SPEED SIGNALS RECEIVED
U140FIMPLAUSIBLE ENGINE VARIANT DATA
U1410IMPLAUSIBLE/MISSING FCM VARIANT DATA
U1505IMPLAUSIBLE MESSAGE DATA LENGTH RECEIVED FROM FDCM
U1507IMPLAUSIBLE ENGINE TEMPERATURE MESSAGE DATA LENGTH RECEIVED
U1508IMPLAUSIBLE MESSAGE DATA LENGTH RECEIVED FROM ESM
U1509IMPLAUSIBLE ENGINE VARIANT MESSAGE DATA LENGTH RECEIVED
U150AIMPLAUSIBLE FCM VARIANT MESSAGE DATA LENGTH RECEIVED

DIAGNOSTIC CODE INDEX

Diagnostic Test

  1. CHECK FOR OTHER TRANSMISSION DTCS With the scan tool, check for other transmission DTCs. Are there any gear ratio and/or speed sensor DTCs present in addition to P0219? Yes Refer to the Symptom Category and perform the appropriate symptom. If speed sensor DTCs are present, perform their respective test first. No Go to 2 .
  2. CHECK FOR ENGINE DTCS With the scan tool, check for engine DTCs. Are there any engine DTCs present? Yes Refer to the Symptom Category and perform the appropriate symptom. No Go to 3 .
  3. CHECK IF ENGINE MECHANICAL PROBLEMS ARE PRESENT Determine if any Engine mechanical problems are present. Are there any Engine mechanical problems present? Yes Repair engine as necessary. Refer to «3.7L - SERVICE INFORMATION»(ref-306142) or «4.0L - SERVICE INFORMATION»(ref-306143) for the appropriate repair procedures. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 4 .
  4. CHECK IF TRANSMISSION MECHANICAL PROBLEMS ARE PRESENT Determine if any Transmission mechanical problems are present. Turn the ignition off to the lock position. Remove the Transmission Oil Pan and inspect for excessive debris or a plugged Transmission Oil Filter. Refer to «STANDARD PROCEDURE»(ref-306223-S30242848742008120900000) . Is there any debris, plugged Transmission Oil Filter, or signs of an internal transmission problem? Yes Repair Transmission as necessary. Refer to «REMOVAL»(ref-306223-S18170500802008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 5 .
  5. TEST DRIVE VEHICLE NOTE: The Engine and Transmission must not have mechanical problems and be operating normally before proceeding with this test. Replace and program the Powertrain Control Module (PCM) per the Service Information. Refer to «MODULE-POWERTRAIN CONTROL»(ref-306152-S30488088142008120900000) for the appropriate service procedures. Reassemble any previously disconnected connectors and/or components. With the scan tool, erase Transmission DTCs. Road test the vehicle. With the scan tool, read Transmission DTCs. Did DTC P0219-ENGINE OVERSPEED reset? Yes Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK THE FCM FOR DTCS With the scan tool, check for FCM DTCs. Does the FCM report the DTC U0001-CAN C BUS DTC or U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE MODULE? Yes Refer to «DIAGNOSIS AND TESTING»(ref-306151-S35980405262008120900000) . Perform the diagnostic procedure for U0001-CAN C BUS DTC first if it is present. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK FOR ABS DTCS With the scan tool, read ABS DTCs. Are there any ABS DTCs present? Yes Refer to the ABS category and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the TCM per the Service Information. Refer to «MODULE-TRANSMISSION CONTROL»(ref-306152-S08889809892008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .

Scheme 550

Scheme 550: Circuit Schematic
Scheme 550: Circuit Schematic
  1. CHECK FOR CHARGING SYSTEM DTCS With the scan tool, read Engine DTCs. NOTE: This includes any one trip faults. Are there any Engine Charging System DTCs present? Yes Refer to the appropriate Engine ELECTRICAL DIAGNOSTICS article and perform the appropriate symptom. No Go to 2 .
  2. CHECK IF VOLTAGE IS GREATER THAN 16.9 VOLTS Start the engine and raise the engine speed to 2000 RPM. With the scan tool, monitor the Transmission system voltage for at least 60 seconds. Does the Transmission system voltage read above 16.9 volts for any period of time? Yes Go to 4 . No Go to 3 .
  3. VERIFY IF VEHICLE WAS JUMP STARTED WITH 24-VOLT SYSTEM Verify if the vehicle was jump started by another vehicle using a 24-volt charging system. Was the vehicle jump started by another vehicle using a 24-volt charging system? Yes This is the cause of the DTC. Erase the DTC and return the vehicle to the customer. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 5 .
  4. CHECK BATTERY VOLTAGE Start the engine and raise the engine speed to 2000 RPM. With the scan tool, read the Transmission system voltage. With a voltmeter, measure the battery voltage at the battery. Compare the readings. Does the voltage readings match between the Transmission scan tool reading and the battery voltmeter reading? Yes Repair the charging system for an over charging condition. Refer to the appropriate Engine ELECTRICAL DIAGNOSTICS article and diagnose the appropriate symptom as if the DTC is current. No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  5. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wires while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete.
  1. CHECK IF TCM IS FLASHABLE NOTE: Controller is programmed with generic software and will not allow the correct vehicle Powertrain management. With the scan tool, record the vehicles controller part number. Select Use Controller Part Number under the Flash Tab. Flash the controller with the correct software. Were you able to update (flash) the controller successfully? Yes Test Complete. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the TCM per the Service Information. Refer to «MODULE-TRANSMISSION CONTROL»(ref-306152-S08889809892008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK IF TCM IS FLASHABLE NOTE: Controller is programmed with generic software and will not allow the correct vehicle Powertrain management. With the scan tool, record the vehicles controller part number. Select Use Controller Part Number under the Flash Tab. Flash the controller with the correct software. Were you able to update (flash) the controller successfully? Yes Test Complete. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. TRANSMISSION CONTROL MODULE View repair Repair Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. TRANSMISSION CONTROL MODULE View repair Repair Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. TRANSMISSION CONTROL MODULE View repair Repair Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK IF TCM IS FLASHABLE With the scan tool, record the vehicles TCM and PCM/ECM part numbers. Verify the model year and make of both the TCM and ECM/PCM part numbers. Flash and program the controller(s) with the correct software that corresponds with year and make of the vehicle. Refer to «NAG1 - SERVICE INFORMATION»(ref-306223) for proper programing procedures. Were you able to update (flash) the controller(s) successfully to the proper software levels? Yes Test Complete. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the TCM per the Service Information. Refer to «MODULE-TRANSMISSION CONTROL»(ref-306152-S08889809892008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .

Scheme 551

Scheme 551: Circuit Schematic
Scheme 551: Circuit Schematic
  1. CHECK FOR SHIFT LEVER ASSEMBLY DTCS With the scan tool, check for Shift Lever Assembly DTCs. Are there any Shift Lever Assembly DTCs present? Yes Refer to Shift Lever Assembly symptom list and perform the appropriate symptom. See «DIAGNOSIS AND TESTING»(ref-306224-S25130953162008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK THE SHIFT LEVER ASSEMBLY CABLE FOR PROPER ADJUSTMENT Check the Shift Lever Assembly Cable for proper adjustment. Refer to «NAG1 - SERVICE INFORMATION»(ref-306223) for the appropriate service procedure. Is the Shift Lever Assembly Cable properly adjusted? Yes Go to 3 . No Adjust the Shift Lever Assembly Cable per the Service Information. Refer to «ADJUSTMENTS»(ref-306223-S34172048002008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  3. CHECK THE (T54) TEMPERATURE SENSOR-P/N SWITCH SIGNAL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off to the lock position. Disconnect the TCM C2 harness connector. Measure the resistance between ground and the (T54) Temperature Sensor-P/N Switch Signal circuit. Is the resistance below 5.0 ohms? Yes Repair the (T54) Temperature Sensor-P/N Switch Signal circuit for a short to ground. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 4 .
  4. CHECK THE (T54) TEMPERATURE SENSOR-P/N SWITCH SIGNAL CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT Disconnect the TCM C1 harness connector. Disconnect the Transmission Electrohydraulic Control Unit Assembly harness connector. Measure the resistance between the (T54) Temperature Sensor-P/N Switch Signal circuit and all other circuits in the TCM C1 and C2 harness connectors. Is the resistance below 5.0 ohms between the (T54) Temperature Sensor-P/N Switch Signal circuit and any other circuit(s)? Yes Repair the (T54) Temperature Sensor-P/N Switch Signal circuit for a short to another circuit(s). Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK WIRING AND CONNECTORS Ignition on, engine not running. With the scan tool, monitor the Transmission Temperature. Apply the parking brake. With the brakes firmly applied, place the gear selector in Drive. While monitoring the scan tool, wiggle the wires and connectors from the TCM to the Electrohydraulic Control Unit. Did the transmission temperature fluctuate while wiggling the wires? Yes Repair the wiring and/or connectors as necessary. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF DTC RESETS Replace the Transmission Temperature Sensor - P/N Switch. Refer to «NAG1 - SERVICE INFORMATION»(ref-306223) for proper service procedure. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . With the scan tool, read Transmission DTCs. Did DTC P0714 reset? Yes Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete.
  1. CHECK IF ABS DTCS ARE PRESENT With the scan tool, check for ABS DTCs. Are there any ABS DTCs present? Yes Refer to «ABS - ELECTRICAL DIAGNOSTICS»(ref-306150) and perform the appropriate symptom(s). No Go to 2 .
  2. CHECK IF TRANSMISSION SOLENOID DTCS ARE PRESENT With the scan tool, check for other transmission DTCs. Are there any transmission solenoid, speed sensor and/or any other transmission electrical related DTCs present? Yes Refer to the symptom list and perform the appropriate symptom(s). No Go to 3 .
  3. CHECK TRANSMISSION FLUID LEVEL NOTE: Low fluid level can be the cause of many transmission problems. Visually inspect the transmission and cooler lines for leakage and repair as necessary and adjust the fluid level per the Service Information. If no visual leaks are observed and the vehicle has obtained over 1610 km (1000 miles) from either new or transmission service, a fluid level check is unnecessary. Check the transmission fluid level and condition per the Service Information. Refer to «STANDARD PROCEDURE»(ref-306223-S30242848742008120900000) . Is the fluid level and condition correct? Yes Go to 4 . No Correct the fluid level per the Service Information Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  4. CHECK ENVIRONMENTAL DATA With the scan tool, check environmental data for P1731. Did the environmental data show the code setting during a 3-4 upshift or 4-3 downshift? Yes NOTE: Debris may enter through the vents in the top of the valve body. The debris can be a very small sliver that is visibly unnoticable unless flushing onto a fine filter paper. The debris has the potential to stick the 3-4 Shift Pressure or 3-4 Holding valves. If either valve is stuck during a 3-4 upshift or 4-3 downshift, a shift flare, bump shift, harsh shift, or neutraling out will occur. Flush and clean the Valve Body per the Service Information. Pay particular attention to the 3-4 shift pressure and 3-4 holding valve. Refer to «CLEANING»(ref-306223-S02043528482008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 5 .
  5. CHECK FOR INTERNAL TRANSMISSION PROBLEM Check for an internal Transmission mechanical problem(s). Remove the Transmission Oil Pan and inspect for excessive debris or a plugged Transmission Oil Filter. Refer to «STANDARD PROCEDURE»(ref-306223-S30242848742008120900000) . Inspect the valve body for foreign material, starting with the four valves associated with the shift described in the environmental data (shift pressure, holding, overlap, command), and continue on to the other valves. This DTC is usually set due to an internal transmission problem such as but not limited to: stuck solenoid valve and/or contamination in the valve body, broken springs, leaking clutch seals, dislodged or broken snap ring etc. Inspect the internal transmission, Refer to «NAG1 - SERVICE INFORMATION»(ref-306223) for the appropriate service procedure(s) and other possible causes. Were there any problems found? Yes Repair as necessary per the Service Information. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No If no internal transmission mechanical problems are found, using the schematics as a guide, check the Transmission Control Module (TCM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the TCM per the Service Information. Refer to «MODULE-TRANSMISSION CONTROL»(ref-306152-S08889809892008120900000) for the appropriate service procedure Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK IF THE PINION FACTOR IS PROGRAMMED With the scan tool, check if the pinion factor has been programmed in the FCM. NOTE: If the Pinion Factor is not properly programmed, a Gear Ratio DTC may set. Was the Pinion Factor properly programmed for the actual tire size and axle ratio of the vehicle? Yes Go to 2 . No With the scan tool, properly program the Pinion Factor in the FCM. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  2. CHECK FOR OTHER TRANSMISSION DTCS With the scan tool, check transmission DTCs. Are there any solenoid and/or solenoid supply voltage DTCs present? Yes Refer to the symptom list and perform the appropriate symptom(s). No Go to 3 .
  3. CHECK TRANSMISSION FLUID LEVEL NOTE: Low fluid level can be the cause of many transmission problems. Visually inspect the transmission and cooler lines for leakage and repair as necessary and adjust the fluid level per the Service Information. If no visual leaks are observed and the vehicle has obtained over 1610 km (1000 miles) from either new or transmission service, a fluid level check is unnecessary. Check the transmission fluid level and condition per the Service Information. Refer to «STANDARD PROCEDURE»(ref-306223-S30242848742008120900000) . Is the fluid level correct? Yes Go to 4 . No Properly adjust the fluid level per the Service Information. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  4. CHECK IF DTC IS CURRENT With the scan tool, record the Environmental Data and erase Transmission DTCs. NOTE: If the TCM detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set and is located in scan tool under Environmental Data. Before erasing any stored DTCs, record any available data to assist in duplicating the conditions in which the DTC originally set. Using the Environmental Data recorded earlier, test drive the vehicle while trying to duplicate the conditions in which the DTC originally set. Did the DTC P0731-GEAR RATIO ERROR IN 1ST reset? Yes Repair internal transmission as necessary. Pay particular attention to components related to the referenced DTC. Refer to «NAG1 - SERVICE INFORMATION»(ref-306223) for proper repair procedures. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 5 .
  5. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for any possible open or shorted circuits. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete.
  1. CHECK IF THE PINION FACTOR IS PROGRAMED With the scan tool, check if the pinion factor has been programmed in the FCM. NOTE: If the Pinion Factor is not properly programmed, a Gear Ratio DTC may set. Was the Pinion Factor properly programmed for the actual tire size and axle ratio of the vehicle? Yes Go to 2 . No With the scan tool, properly program the Pinion Factor in the FCM. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  2. CHECK FOR OTHER TRANSMISSION DTCS With the scan tool, check transmission DTCs. Are there any solenoid and/or solenoid supply voltage DTCs present? Yes Refer to the symptom list and perform the appropriate symptom(s). No Go to 3 .
  3. CHECK TRANSMISSION FLUID LEVEL NOTE: Low fluid level can be the cause of many transmission problems. Visually inspect the transmission and cooler lines for leakage and repair as necessary and adjust the fluid level per the Service Information. If no visual leaks are observed and the vehicle has obtained over 1610 km (1000 miles) from either new or transmission service, a fluid level check is unnecessary. Check the transmission fluid level and condition per the Service Information. Refer to «STANDARD PROCEDURE»(ref-306223-S30242848742008120900000) . Is the fluid level correct? Yes Go to 4 . No Properly adjust the fluid level per the Service Information. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  4. CHECK IF DTC IS CURRENT With the scan tool, record the Environmental Data and erase Transmission DTCs. NOTE: If the TCM detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set and is located in scan tool under Environmental Data. Before erasing any stored DTCs, record any available data to assist in duplicating the conditions in which the DTC originally set. Using the Environmental Data recorded earlier, test drive the vehicle while trying to duplicate the conditions in which the DTC originally set. Did the DTC P0732-GEAR RATIO ERROR IN 2ND reset? Yes Repair internal transmission as necessary. Pay particular attention to components related to the referenced DTC. Refer to «NAG1 - SERVICE INFORMATION»(ref-306223) for proper repair procedures. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 5 .
  5. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for any possible open or shorted circuits. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete.
  1. CHECK FOR OTHER TRANSMISSION DTCS With the scan tool, check transmission DTCs. Are there any solenoid and/or solenoid supply voltage DTCs present? Yes Refer to the symptom list and perform the appropriate symptom(s). No Go to 2 .
  2. CHECK FOR OTHER GEAR RATIO DTCS With the scan tool, check transmission DTCs. Is the DTC P0730 and/or P1731 gear ratio DTC also present? Yes Refer to the symptom list and perform the appropriate symptom(s). No Go to 3 .
  3. CHECK TRANSMISSION FLUID LEVEL NOTE: Low fluid level can be the cause of many transmission problems. Visually inspect the transmission and cooler lines for leakage and repair as necessary and adjust the fluid level per the Service Information. If no visual leaks are observed and the vehicle has obtained over 1610 km (1000 miles) from either new or transmission service, a fluid level check is unnecessary. Check the transmission fluid level and condition per the Service Information. Refer to «STANDARD PROCEDURE»(ref-306223-S30242848742008120900000) . Is the fluid level correct? Yes Go to 4 . No Properly adjust the fluid level per the Service Information. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  4. CHECK IF THE DTC IS CURRENT With the scan tool, record the Environmental Data and erase Transmission DTCs. NOTE: If the TCM detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set and is located in scan tool under Environmental Data. Before erasing any stored DTCs, record any available data to assist in duplicating the conditions in which the DTC originally set. Using the Environmental Data recorded earlier, test drive the vehicle while trying to duplicate the conditions in which the DTC originally set. Did the DTC P0733-GEAR RATIO ERROR IN 3RD reset? Yes Repair internal transmission as necessary. Pay particular attention to components related to the referenced DTC. Refer to «NAG1 - SERVICE INFORMATION»(ref-306223) for proper repair procedures. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 5 .
  5. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for any possible open or shorted circuits. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete.
  1. CHECK FOR OTHER TRANSMISSION DTCS With the scan tool, check transmission DTCs. Are there any solenoid and/or solenoid supply voltage DTCs present? Yes Refer to the symptom list and perform the appropriate symptom. No Go to 2 .
  2. CHECK FOR OTHER GEAR RATIO DTCS With the scan tool, check transmission DTCs. Is the DTC P0730 and/or P1731 gear ratio DTC also present? Yes Refer to the symptom list and perform the appropriate symptom(s). No Go to 3 .
  3. CHECK TRANSMISSION FLUID LEVEL NOTE: Low fluid level can be the cause of many transmission problems. Visually inspect the transmission and cooler lines for leakage and repair as necessary and adjust the fluid level per the Service Information. If no visual leaks are observed and the vehicle has obtained over 1610 km (1000 miles) from either new or transmission service, a fluid level check is unnecessary. Check the transmission fluid level and condition per the Service Information. Refer to «STANDARD PROCEDURE»(ref-306223-S30242848742008120900000) . Is the fluid level correct? Yes Go to 4 . No Properly adjust the fluid level per the Service Information. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  4. CHECK IF DTC IS CURRENT With the scan tool, record the Environmental Data and erase Transmission DTCs. NOTE: If the TCM detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set and is located in scan tool under Environmental Data. Before erasing any stored DTCs, record any available data to assist in duplicating the conditions in which the DTC originally set. Using the Environmental Data recorded earlier, test drive the vehicle while trying to duplicate the conditions in which the DTC originally set. Did the DTC P0734-GEAR RATIO ERROR IN 4TH reset? Yes Repair internal transmission as necessary. Pay particular attention to components related to the referenced DTC. Refer to «NAG1 - SERVICE INFORMATION»(ref-306223) for proper repair procedures. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 5 .
  5. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for any possible open or shorted circuits. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete.
  1. CHECK FOR OTHER TRANSMISSION DTCS With the scan tool, check transmission DTCs. Are there any solenoid and/or solenoid supply voltage DTCs present? Yes Refer to the symptom list and perform the appropriate symptom(s). No Go to 2 .
  2. CHECK TRANSMISSION FLUID LEVEL NOTE: Low fluid level can be the cause of many transmission problems. Visually inspect the transmission and cooler lines for leakage and repair as necessary and adjust the fluid level per the Service Information. If no visual leaks are observed and the vehicle has obtained over 1610 km (1000 miles) from either new or transmission service, a fluid level check is unnecessary. Check the transmission fluid level and condition per the Service Information. Refer to «STANDARD PROCEDURE»(ref-306223-S30242848742008120900000) . Is the fluid level correct? Yes Go to 3 . No Properly adjust the fluid level per the Service Information. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  3. CHECK IF DTC IS CURRENT With the scan tool, record the Environmental Data and erase Transmission DTCs. NOTE: If the TCM detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set and is located in scan tool under Environmental Data. Before erasing any stored DTCs, record any available data to assist in duplicating the conditions in which the DTC originally set. Using the Environmental Data recorded earlier, test drive the vehicle while trying to duplicate the conditions in which the DTC originally set. Did the DTC P0735-GEAR RATIO ERROR IN 5TH reset? Yes Repair internal transmission as necessary. Pay particular attention to components related to the referenced DTC. Refer to «NAG1 - SERVICE INFORMATION»(ref-306223) for proper repair procedures. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 4 .
  4. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for any possible open or shorted circuits. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete.
  1. CHECK IF ENGINE STALLS OR STUMBLES IN GEAR Turn the ignition off to the lock position. Disconnect the Electrohydraulic Control Unit Assembly harness connector. NOTE: Check connectors - Clean/repair as necessary. Start the engine. With the brakes firmly applied, shift the gear selector into Drive. Did the engine stall or stumble? Yes Repair internal transmission. Pay particular attention to the components related to the TCC such as the Lockup Control Valve sticking in its bore or a leaking TCC Solenoid. Refer to «REMOVAL»(ref-306223-S18170500802008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. (T75) TCC SOLENOID CONTROL CIRCUIT SHORT TO GROUND Turn the ignition off to the lock position. Disconnect the TCM C2 harness connector. NOTE: Check connectors - Clean/repair as necessary. Measure the resistance between ground and the (T75) TCC Solenoid Control circuit. Is the resistance below 5.0 ohms? Yes Repair the (T75) TCC Solenoid Control circuit for a short to ground. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 3 .
  3. (T75) TCC SOLENOID CONTROL CIRCUIT SHORT TO ANOTHER CIRCUIT Measure the resistance between the (T75) TCC Solenoid Control circuit and all other circuits in the Transmission Electrohydraulic Control Unit Assembly harness connector. Is the resistance below 5.0 ohms between the (T75) TCC Solenoid Control circuit and all other circuits in the Transmission Electrohydraulic Control Unit Assembly harness connector? Yes Repair the (T75) TCC Solenoid Control circuit for a short to another circuit(s). Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK IF THE DTC IS CURRENT NOTE: When the Transmission Control Module (TCM) detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set. This information is located in the scan tool under Environmental Data. Before erasing any stored DTCs, record any available data to assist in duplicating the conditions in which the DTC originally set. Turn the ignition off to the lock position. With the scan tool, erase Transmission DTC's. Using the Environmental Data recorded earlier, try to duplicate the conditions in which the DTC originally set. It may be necessary to test drive the vehicle. With the scan tool, read Transmission DTC's. Did the DTC P0753 reset? Yes Go to 2 . No Go to 6 .
  2. CHECK THE (T60) 1-2/4-5 SOLENOID CONTROL CIRCUIT FOR AN OPEN Turn the ignition off to the lock position. Disconnect the TCM C2 harness connector. Disconnect the Transmission Electrohydraulic Control Unit Assembly harness connector. Measure the resistance of the (T60) 1-2/4-5 Solenoid Control circuit between the TCM C2 harness connector and the Transmission Electrohydraulic Control Unit Assembly harness connector. Is the resistance below 5.0 ohms? Yes Go to 3 . No Repair the (T60) 1-2/4-5 Solenoid Control circuit for an open. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  3. CHECK THE (T60) 1-2/4-5 SOLENOID CONTROL CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the (T60) 1-2/4-5 Solenoid Control circuit. Is the resistance below 5.0 ohms? Yes Repair the (T60) 1-2/4-5 Solenoid Control circuit for a short to ground. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 4 .
  4. CHECK THE (T60) 1-2/4-5 SOLENOID CONTROL CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT Measure the resistance between the (T60) 1-2/4-5 Solenoid Control circuit and every other circuit in the Transmission Electrohydraulic Control Unit Assembly harness connector. Is the resistance below 5.0 ohms between the (T60) 1-2/4-5 Solenoid Control circuit and any other circuit(s) in the Transmission Electrohydraulic Control Unit Assembly harness connector? Yes Repair the (T60) 1-2/4-5 Solenoid Control circuit for a short to another circuit(s). Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 5 .
  5. CHECK THE 1-2/4-5 SOLENOID Reconnect the Transmission Electrohydraulic Control Unit Assembly harness connector. Measure the resistance of the 1-2/4-5 Solenoid between the (T60) 1-2/4-5 Solenoid Control circuit and the (T78) Solenoid Voltage Supply circuit in the TCM C2 harness connector. Is the resistance between 2.5 and 6.5 ohms? Yes Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Replace the 1-2/4-5 Solenoid per the Service Information. Refer to «DISASSEMBLY»(ref-306223-S19241738462008120900000) .
  6. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for any possible open or shorted circuits. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete.
  1. CHECK IF THE DTC IS CURRENT NOTE: When the Transmission Control Module (TCM) detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set. This information is located in the scan tool under Environmental Data. Before erasing any stored DTCs, record any available data to assist in duplicating the conditions in which the DTC originally set. Turn the ignition off to the lock position. With the scan tool, erase Transmission DTC's. Using the Environmental Data recorded earlier, try to duplicate the conditions in which the DTC originally set. It may be necessary to test drive the vehicle. With the scan tool, read Transmission DTC's. Did the DTC P0758 reset? Yes Go to 2 . No Go to 6 .
  2. CHECK THE (T74) 2-3 SOLENOID CONTROL CIRCUIT FOR AN OPEN Turn the ignition off to the lock position. Disconnect the TCM C2 harness connector. Disconnect the Transmission Electrohydraulic Control Unit Assembly harness connector. Measure the resistance of the (T74) 2-3 Solenoid Control circuit between the TCM C2 harness connector and the Transmission Electrohydraulic Control Unit Assembly harness connector. Is the resistance below 5.0 ohms? Yes Go to 3 . No Repair the (T74) 2-3 Solenoid Control circuit for an open. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  3. CHECK THE (T74) 2-3 SOLENOID CONTROL CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the (T74) 2-3 Solenoid Control circuit. Is the resistance below 5.0 ohms? Yes Repair the (T74) 2-3 Solenoid Control circuit for a short to ground. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 4 .
  4. CHECK THE (T74) 2-3 SOLENOID CONTROL CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT Measure the resistance between the (T74) 2-3 Solenoid Control circuit and every other circuit in the Transmission Electrohydraulic Control Unit Assembly harness connector. Is the resistance below 5.0 ohms between the (T74) 2-3 Solenoid Control circuit and any other circuit(s) in the Transmission Electrohydraulic Control Unit Assembly harness connector? Yes Repair the (T74) 2-3 Solenoid Control circuit for a short to another circuit(s). Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 5 .
  5. CHECK THE 2-3 SOLENOID Reconnect the Transmission Electrohydraulic Control Unit Assembly harness connector. Measure the resistance of the 2-3 Solenoid between the (T74) 2-3 Solenoid Control circuit and the (T78) Solenoid Voltage Supply circuit in the TCM C2 harness connector. Is the resistance between 2.5 and 6.5 ohms? Yes Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Replace the 2-3 Solenoid per the Service Information. Refer to «DISASSEMBLY»(ref-306223-S19241738462008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  6. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for any possible open or shorted circuits. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete.
  1. CHECK IF THE DTC IS CURRENT NOTE: When the Transmission Control Module (TCM) detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set. This information is located in the scan tool under Environmental Data. Before erasing any stored DTCs, record any available data to assist in duplicating the conditions in which the DTC originally set. Turn the ignition off to the lock position. With the scan tool, erase Transmission DTC's. Using the Environmental Data recorded earlier, try to duplicate the conditions in which the DTC originally set. It may be necessary to test drive the vehicle. With the scan tool, read Transmission DTC's. Did the DTC P0763 reset? Yes Go to 2 . No Go to 6 .
  2. CHECK THE (T73) 3-4 SOLENOID CONTROL CIRCUIT FOR AN OPEN Turn the ignition off to the lock position. Disconnect the TCM C2 harness connector. Disconnect the Transmission Electrohydraulic Control Unit Assembly harness connector. Measure the resistance of the (T73) 3-4 Solenoid Control circuit between the TCM C2 harness connector and the Transmission Electrohydraulic Control Unit Assembly harness connector. Is the resistance below 5.0 ohms? Yes Go to 3 . No Repair the (T73) 3-4 Solenoid Control circuit for an open. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  3. CHECK THE (T73) 3-4 SOLENOID CONTROL CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the (T73) 3-4 Solenoid Control circuit. Is the resistance below 5.0 ohms? Yes Repair the (T73) 3-4 Solenoid Control circuit for a short to ground. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 4 .
  4. CHECK THE (T73) 3-4 SOLENOID CONTROL CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT Measure the resistance between the (T73) 3-4 Solenoid Control circuit and every other circuit in the Transmission Electrohydraulic Control Unit Assembly harness connector. Is the resistance below 5.0 ohms between the (T73) 3-4 Solenoid Control circuit and any other circuit(s) in the Transmission Electrohydraulic Control Unit Assembly harness connector? Yes Repair the (T73) 3-4 Solenoid Control circuit for a short to another circuit(s). Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 5 .
  5. CHECK THE 3-4 SOLENOID Reconnect the Transmission Electrohydraulic Control Unit Assembly harness connector. Measure the resistance of the 3-4 Solenoid between the (T73) 3-4 Solenoid Control circuit and the (T78) Solenoid Voltage Supply circuit in the TCM C2 harness connector. Is the resistance between 2.5 and 6.5 ohms? Yes Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Replace the 3-4 Solenoid per the Service Information. Refer to «DISASSEMBLY»(ref-306223-S19241738462008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  6. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for any possible open or shorted circuits. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete.
  1. CHECK IF TCM IS CORRECT Flash and reprogram the TCM with the correct software per the Service Information. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . Did the DTC reset after the Verification Test? Yes Using the schematics as a guide, check the Transmission Control Module (TCM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the TCM per the Service Information. Refer to «MODULE-TRANSMISSION CONTROL»(ref-306152-S08889809892008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete.
  1. CHECK THE (T78) SOLENOID SUPPLY VOLTAGE CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT Turn the ignition off to the lock position. Disconnect the TCM C1 and C2 harness connectors. Disconnect the Transmission Electrohydraulic Control Unit Assembly harness connector. Measure the resistance between the (T78) Solenoid Supply Voltage circuit and every other circuit in the Transmission Electrohydraulic Control Unit Assembly harness connector. Is the resistance below 5.0 ohms between the (T78) Solenoid Supply Voltage circuit and any other circuit(s) in the Transmission Electrohydraulic Control Unit Assembly harness connector? Yes Repair the (T78) Solenoid Supply Voltage circuit for a short to another circuit(s). Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. TRANSMISSION CONTROL MODULE View repair Repair Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. TRANSMISSION CONTROL MODULE View repair Repair Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. TRANSMISSION CONTROL MODULE View repair Repair Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. TRANSMISSION CONTROL MODULE View repair Repair Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. TRANSMISSION CONTROL MODULE View repair Repair Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. TRANSMISSION CONTROL MODULE View repair Repair Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. TRANSMISSION CONTROL MODULE View repair Repair Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. TRANSMISSION CONTROL MODULE View repair Repair Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. PERFORM TCM REPLACEMENT PROCEDURE NOTE: Controller is programmed with generic software and will not allow the correct vehicle Powertrain management. With the scan tool, perform the TCM replacement procedure. Were you able to update the controller successfully? Yes Test Complete. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK TO SEE IF DTC IS CURRENT Turn the ignition on. With the scan tool, erase Transmission DTCs. Raise the vehicle on the hoist. Start the engine. With the scan tool, monitor the Input Speed Sensor 1 RPM. Firmly apply the brakes and place the gear selector in Drive. WARNING: To avoid personal injury or death, keep hands and feet clear of rotating wheels. Release the brakes and raise the engine RPM to allow the transmission to upshift to the 2-3 and 3-4 shift schedule. Did the Input Speed Sensor 1 display an RPM above 7700? Yes Go to 2 . No Go to 3 .
  2. INTERNAL TRANSMISSION This DTC is an indication of an internal transmission failure. Remove the Transmission Oil Pan and inspect for excessive debris such as clutch friction material or metal contamination. Is there any indication of an internal transmission failure? Yes Repair internal transmission as necessary per the Service Information. Refer to «REMOVAL»(ref-306223-S18170500802008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  3. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for any possible open or shorted circuits. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete.
  1. CHECK TO SEE IF DTC IS CURRENT Turn the ignition on. With the scan tool, erase Transmission DTCs. Raise the vehicle on the hoist. Start the engine. With the scan tool, monitor the Input Speed Sensor 2 RPM. Firmly apply the brakes and place the gear selector in Drive. WARNING: To avoid personal injury or death, keep hands and feet clear of rotating wheels. Release the brakes and raise the engine RPM to allow the transmission to upshift to the 2-3 and 3-4 shift schedule. Did the Input Speed Sensor 2 display an RPM above 7700? Yes Go to 2 . No Go to 3 .
  2. INTERNAL TRANSMISSION This DTC is an indication of an internal transmission failure. Remove the Transmission Oil Pan and inspect for excessive debris such as clutch friction material or metal contamination. Is there any indication of an internal transmission failure? Yes Repair internal transmission as necessary per the Service Information. Refer to «REMOVAL»(ref-306223-S18170500802008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  3. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for any possible open or shorted circuits. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete.
  1. CHECK IF ABS DTCS ARE PRESENT With the scan tool, check for ABS DTCs. Are there any ABS DTCs present? Yes Refer to «DIAGNOSIS AND TESTING»(ref-306140-S13961032012008120900000) and perform the appropriate symptom(s). No Go to 2 .
  2. CHECK IF TRANSMISSION SOLENOID DTCS ARE PRESENT With the scan tool, check for other transmission DTCs. Are there any transmission solenoid, speed sensor and/or any other transmission electrical related DTCs present? Yes Refer to the symptom list and perform the appropriate symptom(s). No Go to 3 .
  3. CHECK TRANSMISSION FLUID LEVEL NOTE: Low fluid level can be the cause of many transmission problems. Visually inspect the transmission and cooler lines for leakage and repair as necessary and adjust the fluid level per the Service Information. If no visual leaks are observed and the vehicle has obtained over 1610 km (1000 miles) from either new or transmission service, a fluid level check is unnecessary. Check the transmission fluid level and condition per the Service Information. Refer to «STANDARD PROCEDURE»(ref-306223-S30242848742008120900000) . Is the fluid level correct? Yes Go to 4 . No Correct the fluid level per the Service Information. Refer to «NAG1 - SERVICE INFORMATION»(ref-306223) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  4. CHECK ENVIRONMENTAL DATA With the scan tool, check environmental data for P1731. Did the environmental data show the code setting during a 3-4 upshift or 4-3 downshift? Yes NOTE: Debris may enter through the vents in the top of the valve body. The debris can be a very small sliver that is visibly unnoticable unless flushing onto a fine filter paper. The debris has the potential to stick the 3-4 Shift Pressure or 3-4 Holding valves. If either valve is stuck during a 3-4 upshift or 4-3 downshift, a shift flare, bump shift, harsh shift, or neutraling out will occur. Flush and clean the Valve Body per the Service Information. Pay particular attention to the 3-4 shift pressure and 3-4 holding valve. Refer to «CLEANING»(ref-306223-S02043528482008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 5 .
  5. CHECK FOR INTERNAL TRANSMISSION PROBLEM Check for an internal Transmission mechanical problem(s). Remove the Transmission Oil Pan and inspect for excessive debris or a plugged Transmission Oil Filter. Refer to «STANDARD PROCEDURE»(ref-306223-S30242848742008120900000) . Inspect the valve body for foreign material, starting with the four valves associated with the shift described in the environmental data (shift pressure, holding, overlap, command), and continue on to the other valves. This DTC is usually set due to an internal transmission problem such as but not limited to: stuck solenoid valve and/or contamination in the valve body, broken springs, leaking clutch seals, dislodged or broken snap ring etc. Inspect the internal transmission, Refer to «NAG1 - SERVICE INFORMATION»(ref-306223) for the appropriate service procedure(s) and other possible causes. Were there any problems found? Yes Repair as necessary per the Service Information. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the TCM per the Service Information. Refer to «MODULE-TRANSMISSION CONTROL»(ref-306152-S08889809892008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR ENGINE DTC PRESENT With the scan tool, check engine DTCs. Are there any engine DTCs present? Yes Refer to the appropriate Engine ELECTRICAL DIAGNOSTICS article and diagnose the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK FOR CAN BUS DTCS With the scan tool, check for any CAN bus DTCs or a sign of a CAN bus failure. Are there any CAN bus DTCs present in any module other than the TCM or an overall indication of a CAN bus communication problem? Yes This is an indication of a CAN bus communication problem. Depending on the DTC, either refer to the module reporting the DTC and perform diagnostics for the appropriate symptom or refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 3 .
  3. CHECK IF DTC RESETS Turn the ignition off to the lock position. Replace and program the Powertrain Control Module per the Service Information. Refer to «MODULE-POWERTRAIN CONTROL»(ref-306152-S30488088142008120900000) for the appropriate service procedure. With the scan tool, record the Environmental Data and erase Transmission DTCs. NOTE: If the TCM detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set and is located in scan tool under Environmental Data. Before erasing any stored DTCs, record any available data to assist in duplicating the conditions in which the DTC originally set. Using the Environmental Data recorded earlier, test drive the vehicle while trying to duplicate the conditions in which the DTC originally set. With the scan tool, read Transmission DTCs. Did the DTC P2638-TORQUE MANAGEMENT FEEDBACK SIGNAL PERFORMANCE reset? Yes Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR AN INTERNAL TRANSMISSION PROBLEM This DTC is an informational DTC. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply. This is usually a sign of Torque Converter Clutch failure or an internal transmission problem. Check the Engine and Transmission Cooling Systems for proper operation. View repair. Repair Repair internal Transmission, Torque Converter, and/or Transmission and Engine Cooling systems as necessary. Refer to «REMOVAL»(ref-306223-S18170500802008120900000) , and/or «DIAGNOSIS AND TESTING»(ref-306154-S09314354922008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR SPEED SENSOR OR SENSOR SUPPLY VOLTAGE DTCS With the scan tool, check for other transmission DTCs. Are any Input Speed Sensor and/or Sensor Supply Voltage DTCs present? Yes Refer to the Transmission category and perform the appropriate symptom(s). See «DIAGNOSIS AND TESTING»(ref-306224-S25130953162008120900000) . No Go to 2 .
  2. CHECK TO SEE IF INPUT SENSOR MISMATCH IS CURRENT NOTE: If the TCM detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set and is located in scan tool under Environmental Data. Before erasing any stored DTCs, record any available data to assist in duplicating the conditions in which the DTC originally set. With the scan tool, record the Environmental Data and erase Transmission DTCs. Using the Environmental Data recorded earlier, test drive the vehicle while trying to duplicate the conditions in which the DTC originally set. Did the DTC P2784-INPUT SPEED SENSOR 1/2 CORRELATION reset? Yes Go to 3 . No Go to 4 .
  3. INTERNAL TRANSMISSION Turn the ignition off to the lock position. Remove the Transmission Oil Pan and inspect for debris, a plugged Transmission Oil Filter, or any sign of an internal transmission problem. Is there any debris, plugged Transmission Oil Filter, or any sign of an internal transmission problem? Yes Repair as necessary. Refer to «NAG1 - SERVICE INFORMATION»(ref-306223) for the appropriate service procedures. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  4. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for any possible open or shorted circuits. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete.
  1. CHECK FCM FOR AN OVERALL CAN COMMUNICATION BUS FAILURE With the scan tool, check for FCM DTCs. Does the FCM report a CAN C Bus failure, or one or more CAN C Bus DTCs? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform the diagnostic procedure for U0001-CAN C BUS DTC first if it is present. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF THE DTC IS CURRENT NOTE: When the Transmission Control Module (TCM) detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set. This information is located in the scan tool under Environmental Data. Before erasing any stored DTCs, record any available data to assist in duplicating the conditions in which the DTC originally set. Ignition on, engine not running. With the scan tool, erase Transmission DTC's. Using the Environmental Data recorded earlier, try to duplicate the conditions in which the DTC originally set. It may be necessary to test drive the vehicle. With the scan tool, read Transmission DTC's. Did the DTC U0002-CAN C BUS OFF PERFORMANCE reset? Yes Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 3 .
  3. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for any possible open or shorted circuits. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete.
  1. CHECK THE FCM FOR CAN C BUS COMMUNICATION DTCS With the scan tool, check for FCM DTCs. Does the FCM report the DTC U0001-CAN C BUS or U0100-LOST COMMUNICATION WITH ECM/PCM? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform the diagnostic procedure for U0001-CAN C BUS first if it is present. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF THE DTC IS CURRENT NOTE: When the Transmission Control Module (TCM) detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set. This information is located in the scan tool under Environmental Data. Before erasing any stored DTCs, record any available data to assist in duplicating the conditions in which the DTC originally set. Ignition on, engine not running. With the scan tool, erase Transmission DTC's. Using the Environmental Data recorded earlier, try to duplicate the conditions in which the DTC originally set. It may be necessary to test drive the vehicle. With the scan tool, read Transmission DTC's. Did the DTC U0100-LOST COMMUNICATION WITH ECM/PCM reset? Yes Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 3 .
  3. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for any possible open or shorted circuits. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete.
  1. CHECK THE FCM FOR CAN C BUS COMMUNICATION DTCS With the scan tool, check for FCM DTCs. Does the FCM report the DTC U0001-CAN C BUS DTC or U0100-LOST COMMUNICATION WITH ECM/PCM? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform the diagnostic procedure for U0001-CAN C BUS first if it is present. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF THE DTC IS CURRENT NOTE: When the Transmission Control Module (TCM) detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set. This information is located in the scan tool under Environmental Data. Before erasing any stored DTCs, record any available data to assist in duplicating the conditions in which the DTC originally set. Ignition on, engine not running. With the scan tool, erase Transmission DTC's. Using the Environmental Data recorded earlier, try to duplicate the conditions in which the DTC originally set. It may be necessary to test drive the vehicle. With the scan tool, read Transmission DTC's. Did the DTC U0103-LOST COMMUNICATION WITH ELECTRIC GEAR SHIFT MODULE reset? Yes Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 3 .
  3. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for any possible open or shorted circuits. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete.
  1. CHECK THE FCM FOR CAN C BUS COMMUNICATION DTCS With the scan tool, check for FCM DTCs. Does the FCM report the DTC U0001-CAN C BUS DTC or U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE MODULE? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform the diagnostic procedure for U0001-CAN C BUS first if it is present. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF THE DTC IS CURRENT NOTE: When the Transmission Control Module (TCM) detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set. This information is located in the scan tool under Environmental Data. Before erasing any stored DTCs, record any available data to assist in duplicating the conditions in which the DTC originally set. Ignition on, engine not running. With the scan tool, erase Transmission DTC's. Using the Environmental Data recorded earlier, try to duplicate the conditions in which the DTC originally set. It may be necessary to test drive the vehicle. With the scan tool, read Transmission DTC's. Did the DTC U0121-LOST COMMUNICATION WITH ANTILOCK BRAKE MODULE reset? Yes Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 3 .
  3. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for any possible open or shorted circuits. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete.
  1. CHECK THE FCM FOR CAN C BUS COMMUNICATION DTCS With the scan tool, check for FCM DTCs. Does the FCM report the DTC U0001-CAN C BUS DTC or U0101-LOST COMMUNICATION WITH TCM? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform the diagnostic procedure for U0001-CAN C BUS first if it is present. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF THE DTC IS CURRENT NOTE: When the Transmission Control Module (TCM) detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set. This information is located in the scan tool under Environmental Data. Before erasing any stored DTCs, record any available data to assist in duplicating the conditions in which the DTC originally set. Ignition on, engine not running. With the scan tool, erase Transmission DTC's. Using the Environmental Data recorded earlier, try to duplicate the conditions in which the DTC originally set. It may be necessary to test drive the vehicle. With the scan tool, read Transmission DTC's. Did the DTC U0141-LOST COMMUNICATION WITH FRONT CONTROL MODULE reset? Yes Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 3 .
  3. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for any possible open or shorted circuits. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete.
  1. CHECK THE FCM FOR CAN C BUS COMMUNICATION DTCS With the scan tool, check for FCM DTCs. Does the FCM report the DTC U0001-CAN C BUS DTC or U0155-LOST COMMUNICATION WITH CLUSTER/CCN? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform the diagnostic procedure for U0001-CAN C BUS first if it is present. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF THE DTC IS CURRENT NOTE: When the Transmission Control Module (TCM) detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set. This information is located in the scan tool under Environmental Data. Before erasing any stored DTCs, record any available data to assist in duplicating the conditions in which the DTC originally set. Ignition on, engine not running. With the scan tool, erase Transmission DTC's. Using the Environmental Data recorded earlier, try to duplicate the conditions in which the DTC originally set. It may be necessary to test drive the vehicle. With the scan tool, read Transmission DTC's. Did the DTC U0155-LOST COMMUNICATION WITH CLUSTER/CCN reset? Yes Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 3 .
  3. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for any possible open or shorted circuits. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete.
  1. CHECK THE FCM FOR CAN C BUS COMMUNICATION DTCS With the scan tool, check for FCM DTCs. Does the FCM report the DTC U0001-CAN C BUS DTC or U0164-LOST COMMUNICATION WITH HVAC CONTROL MODULE? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform the diagnostic procedure for U0001-CAN C BUS first if it is present. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF THE DTC IS CURRENT NOTE: When the Transmission Control Module (TCM) detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set. This information is located in the scan tool under Environmental Data. Before erasing any stored DTCs, record any available data to assist in duplicating the conditions in which the DTC originally set. Ignition on, engine not running. With the scan tool, erase Transmission DTCs. Using the Environmental Data recorded earlier, try to duplicate the conditions in which the DTC originally set. It may be necessary to test drive the vehicle. With the scan tool, read Transmission DTCs. Did the DTC U0164-LOST COMMUNICATION WITH HVAC CONTROL MODULE reset? Yes Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 3 .
  3. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for any possible open or shorted circuits. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete.
  1. CHECK IF FCM CAN BUS DTCS ARE PRESENT With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTCs present? Yes Refer to «DIAGNOSIS AND TESTING»(ref-306151-S35980405262008120900000) and diagnose the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF ENGINE DTCS ARE PRESENT With the scan tool, read Engine DTCs. Are there any Engine DTCs present? Yes Refer to the appropriate Engine ELECTRICAL DIAGNOSTICS article and diagnose the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTCs present? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. ELECTRONIC SHIFT MODULE DTC'S PRESENT With the scan tool, read Electronic Shift Module (ESM) DTCs. Are there any ESM DTCs present? Yes Refer to «NAG1 - SHIFTER DIAGNOSTICS»(ref-306222) and perform the appropriate diagnostic procedure. No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTCs present? Yes Refer to «DIAGNOSIS AND TESTING»(ref-306151-S35980405262008120900000) and perform the appropriate symptom(s). Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. ELECTRONIC SHIFT MODULE DTCS PRESENT With the scan tool, read Final Drive Control Module (FDCM) DTCs. Are there any FDCM DTCs present? Yes Refer to «DIFFERENTIAL & DRIVELINE»(ref-306145) and perform the appropriate symptom(s). No Using the schematics as a guide, check the Transmission Control Module (TCM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the TCM per the Service Information. Refer to «MODULE-TRANSMISSION CONTROL»(ref-306152-S08889809892008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTCs present? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF ABS DTCS ARE PRESENT With the scan tool, read ABS DTCs. Are there any ABS Do's present? Yes Refer to «ABS - ELECTRICAL DIAGNOSTICS»(ref-306150) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTCs present? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF CLUSTER/CCN DTCS ARE PRESENT With the scan tool, read CLUSTER/CCN DTCs. Are there any CLUSTER/CCN DTCs present? Yes Refer to «INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS»(ref-306157) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTCs present? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF HVAC DTCS ARE PRESENT With the scan tool, read HVAC DTCs. Are there any HVAC DTCs present? Yes Refer to «HEATING & AIR CONDITIONING - ELECTRICAL DIAGNOSTICS»(ref-306156) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTCS present? Yes Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK THE FCM FOR CAN C BUS COMMUNICATION DTCS With the scan tool, check for FCM DTCs. Does the FCM report the DTC U0001-CAN C BUS DTC or U0100-LOST COMMUNICATION WITH ECM/PCM? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform the diagnostic procedure for U0001-CAN C BUS first if it is present. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF THE DTC IS CURRENT NOTE: When the Transmission Control Module (TCM) detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set. This information is located in the scan tool under Environmental Data. Before erasing any stored DTCs, record any available data to assist in duplicating the conditions in which the DTC originally set. Ignition on, engine not running. With the scan tool, erase Transmission DTCs. Using the Environmental Data recorded earlier, try to duplicate the conditions in which the DTC originally set. It may be necessary to test drive the vehicle. With the scan tool, read Transmission DTCs. Did the DTC U110B-LOST ENGINE COOLANT MESSAGE reset? Yes Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 3 .
  3. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for any possible open or shorted circuits. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete.
  1. CHECK THE FCM FOR CAN C BUS COMMUNICATION DTCS With the scan tool, check for FCM DTCs. Does the FCM report the DTC U0001-CAN C BUS or U0100-LOST COMMUNICATION WITH ECM/PCM? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform the diagnostic procedure for U0001-CAN C BUS first if it is present. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF THE DTC IS CURRENT NOTE: When the Transmission Control Module (TCM) detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set. This information is located in the scan tool under Environmental Data. Before erasing any stored DTCs, record any available data to assist in duplicating the conditions in which the DTC originally set. Ignition on, engine not running. With the scan tool, erase Transmission DTCs. Using the Environmental Data recorded earlier, try to duplicate the conditions in which the DTC originally set. It may be necessary to test drive the vehicle. With the scan tool, read Transmission DTCs. Did the DTC U1118-LOST ENGINE MESSAGE reset? Yes Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 3 .
  3. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for any possible open or shorted circuits. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete.
  1. CHECK THE FCM FOR CAN C BUS COMMUNICATION DTCS With the scan tool, check for FCM DTCs. Does the FCM report the DTC U0001-CAN C BUS or U0101-LOST COMMUNICATION WITH TCM? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform the diagnostic procedure for U0001-CAN C BUS first if it is present. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF THE DTC IS CURRENT NOTE: When the Transmission Control Module (TCM) detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set. This information is located in the scan tool under Environmental Data. Before erasing any stored DTCs, record any available data to assist in duplicating the conditions in which the DTC originally set. Ignition on, engine not running. With the scan tool, erase Transmission DTC's. Using the Environmental Data recorded earlier, try to duplicate the conditions in which the DTC originally set. It may be necessary to test drive the vehicle. With the scan tool, read Transmission DTC's. Did the DTC U1119-LOST FCM MESSAGE reset? Yes Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 3 .
  3. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for any possible open or shorted circuits. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Test Complete.
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTCs present? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF ECM/PCM DTC'S ARE PRESENT With the scan tool, read engine DTCs. Are there any engine DTCs present? Yes Refer to the appropriate Engine ELECTRICAL DIAGNOSTICS article and diagnose the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTCs present? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF ENGINE DTC'S ARE PRESENT With the scan tool, read engine DTCs. Are there any engine DTCs present? Yes Refer to the appropriate Engine ELECTRICAL DIAGNOSTICS article and diagnose the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTC's present? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF ENGINE DTC'S ARE PRESENT With the scan tool, read engine DTCs. Are there any engine DTC's present? Yes Refer to the appropriate Engine ELECTRICAL DIAGNOSTICS article and diagnose the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTC's present? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF ENGINE DTC'S ARE PRESENT With the scan tool, read engine DTCs. Are there any engine DTC's present? Yes Refer to the appropriate Engine ELECTRICAL DIAGNOSTICS article and diagnose the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTC's present? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF ENGINE DTC'S ARE PRESENT With the scan tool, read engine DTCs. Are there any engine DTC's present? Yes Refer to the appropriate Engine ELECTRICAL DIAGNOSTICS article and diagnose the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTC's present? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF ENGINE DTC'S ARE PRESENT With the scan tool, read engine DTCs. Are there any engine DTC's present? Yes Refer to the appropriate Engine ELECTRICAL DIAGNOSTICS article and diagnose the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTC's present? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF ENGINE DTC'S ARE PRESENT With the scan tool, read engine DTCs. Are there any engine DTC's present? Yes Refer to the appropriate Engine ELECTRICAL DIAGNOSTICS article and diagnose the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTC's present? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF ABS DTC'S ARE PRESENT With the scan tool, read ABS DTCs. Are there any ABS DTC's present? Yes Refer to «ABS - ELECTRICAL DIAGNOSTICS»(ref-306150) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTC's present? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF ABS DTC'S ARE PRESENT With the scan tool, read ABS DTCs. Are there any ABS DTC's present? Yes Refer to «ABS - ELECTRICAL DIAGNOSTICS»(ref-306150) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTC's present? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF ABS DTC'S ARE PRESENT With the scan tool, read ABS DTCs. Are there any ABS DTC's present? Yes Refer to «ABS - ELECTRICAL DIAGNOSTICS»(ref-306150) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTC's present? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF ABS DTC'S ARE PRESENT With the scan tool, read ABS DTCs. Are there any ABS DTC's present? Yes Refer to «ABS - ELECTRICAL DIAGNOSTICS»(ref-306150) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTC's present? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF ABS DTC'S ARE PRESENT With the scan tool, read ABS DTCs. Are there any ABS DTC's present? Yes Refer to «ABS - ELECTRICAL DIAGNOSTICS»(ref-306150) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTC's present? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF ABS DTC'S ARE PRESENT With the scan tool, read ABS DTCs. Are there any ABS DTC's present? Yes Refer to «ABS - ELECTRICAL DIAGNOSTICS»(ref-306150) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTC's present? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF ECM/PCM DTC'S ARE PRESENT With the scan tool, read ECM/PCM DTCs. Are there any ECM/PCM DTC's present? Yes Refer to the appropriate Engine ELECTRICAL DIAGNOSTICS article and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTC's present? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTCs present? Yes Refer to «DIAGNOSIS AND TESTING»(ref-306151-S35980405262008120900000) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. ELECTRONIC SHIFT MODULE DTCS PRESENT With the scan tool, read Final Drive Control Module (FDCM) DTCs. Are there any FDCM DTCs present? Yes Refer to «DIFFERENTIAL & DRIVELINE»(ref-306145) and perform the appropriate diagnostic procedure. No Using the schematics as a guide, check the Transmission Control Module (TCM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the TCM per the Service Information. Refer to «MODULE-TRANSMISSION CONTROL»(ref-306152-S08889809892008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTC's present? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF ECM/PCM DTC'S ARE PRESENT With the scan tool, read ECM/PCM DTCs. Are there any ECM/PCM DTC's present? Yes Refer to the appropriate Engine ELECTRICAL DIAGNOSTICS article and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTCs present? Yes Refer to «DIAGNOSIS AND TESTING»(ref-306151-S35980405262008120900000) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. ELECTRONIC SHIFT MODULE DTCS PRESENT With the scan tool, read Electronic Shift Module (ESM) DTCs. Are there any ESM DTCs present? Yes Refer to «NAG1 - SHIFTER DIAGNOSTICS»(ref-306222) and perform the appropriate diagnostic procedure. No Using the schematics as a guide, check the Transmission Control Module (TCM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the TCM per the Service Information. Refer to «MODULE-TRANSMISSION CONTROL»(ref-306152-S08889809892008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTC's present? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Go to 2 .
  2. CHECK IF ECM/PCM DTC'S ARE PRESENT With the scan tool, read ECM/PCM DTCs. Are there any ECM/PCM DTC's present? Yes Refer to the appropriate Engine ELECTRICAL DIAGNOSTICS article and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .
  1. CHECK FOR FCM CAN BUS DTCS With the scan tool, read FCM DTCs. Are there any FCM CAN BUS DTC's present? Yes Refer to «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-306151) and perform the appropriate symptom. Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) . No Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. Refer to «DESCRIPTION»(ref-306152-S16515928992008120900000) . Perform «NAG1 TRANSMISSION VERIFICATION TEST»(ref-306224-S10641537202008120900000) .

NAG1 TRANSMISSION VERIFICATION TEST

To validate that the repair(s) fixed the vehicle, perform the following steps.

  1. Reconnect any disconnected components.
  2. Connect the scan tool to the Data Link Connector.
  3. With the scan tool, erase ABS DTCs.
  4. With the scan tool, erase PCM DTCs.
  5. With the scan tool, erase TCM DTCs. CAUTION: Apply the parking brake. NOTE: The Transmission Temperature can only be read while in Reverse or Drive.
  6. With the scan tool, display the Transmission temperature. Start and run the engine until the Transmission temperature is above 43° C (110° F).
  7. If internal transmission components were repaired or replaced check the Transmission fluid and adjust if necessary. Refer to the Service Information for the proper Fluid Fill procedure. Refer to «STANDARD PROCEDURE»(ref-306223-S30242848742008120900000) .
  8. If the TCM (EGS) is flashed or replaced, with the scan tool, perform an EGS initialization to relearn variant coding.
  9. If internal transmission repairs are performed or replacement of the Transmission Control Module, perform a TCM ADAPTATION procedure. Refer to «STANDARD PROCEDURE»(ref-306152-S23567501062008120900000) .
  10. After performing the above procedures, perform «ROAD TEST PROCEDURE»(ref-306224-S34578639412008120900000) .

ROAD TEST PROCEDURE

  1. Road test the vehicle. Make fifteen to twenty 1-2, 2-3, 3-4, and 4-5 upshifts.
  2. Perform these shifts from a standing start to 72 Km/h (45 mph) with a constant throttle opening of 20 to 25 degrees.
  3. With speeds below 40 Km/h (25 mph), make five to eight wide open throttle kickdowns to 1st gear. Allow at least 5 seconds each in 2nd and 3rd gear between each kickdown.
  4. With the scan tool, read DTCs.

Did any DTCs set?

Yes

  1. Refer to the identified category and perform the appropriate symptom(s).

No

  1. Testing is complete.

More articles — NAG1 Automatic Transmission - Electrical Diagnostics