DTC U0100, U0297 [5R55S]

id0502c1815600

DTC U0100

Communication error to PCM

DTC U0297

Communication error to PCM
DETECTION CONDITION
•  TCM cannot receive any signals from PCM.
POSSIBLE CAUSE
•  Short to ground in wiring harness between PCM terminal 195 (wiring harness-side) and TCM terminal CB (wiring harness-side).
•  Short to ground in wiring harness between PCM terminal 171 (wiring harness-side) and TCM terminal CF (wiring harness-side).
•  Short to power supply in wiring harness between PCM terminal 195 (wiring harness-side) and TCM terminal CB (wiring harness-side).
•  Short to power supply in wiring harness between PCM terminal 171 (wiring harness-side) and TCM terminal CF (wiring harness-side).
•  Open circuit in wiring harness between PCM terminal 195 (wiring harness-side) and TCM terminal CB (wiring harness-side).
•  Open circuit in wiring harness between PCM terminal 171 (wiring harness-side) and TCM terminal CF (wiring harness-side).
•  Damaged connector between PCM and TCM.
•  PCM malfunction.
•  TCM malfunction.

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has the FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
INSPECT PCM FOR POOR CONNECTION
•  Turn the engine switch to the LOCK position.
•  Inspect the PCM connection.
•  Disconnect the PCM.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is the connection normal?
Yes
Go to the next step.
No
Repair or replace the connector and/or terminals, then go to Step 8.
4
INSPECT TCM CONNECTOR FOR POOR CONNECTION
•  Disconnect the TCM connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is the connection normal?
Yes
Go to the next step.
No
Repair or replace connector and/or terminals, then go to Step 8.
5
INSPECT CAN CIRCUIT FOR OPEN CIRCUIT
•  Inspect for continuity between the TCM terminal (wiring harness-side) and the PCM terminal (wiring harness-side).
―  CB and 195
―  CF and 171
•  Is there continuity between terminals?
Yes
Go to the next step.
No
Repair or replace the wiring harness, then go to Step 8.
6
INSPECT CAN CIRCUIT FOR SHORT TO GROUND
•  Inspect for continuity between TCM terminal (wiring harness-side) and body ground.
―  CB and body ground
―  CF and body ground
•  Is there continuity?
Yes
Repair or replace the wiring harness, then go to the Step 8.
No
Go to the next step.
7
INSPECT CAN CIRCUIT FOR SHORT TO POWER SUPPLY
•  Turn the engine switch to the ON position (engine off).
•  Inspect the voltage at TCM terminal CB and CF (wiring harness-side).
•  Is the voltage 0 V?
Yes
Go to the next step.
No
Repair or replace the wiring harness, then go to the next step.
8
VERIFY TROUBLESHOOTING OF DTC U0100 OR U0297 COMPLETED
•  Make sure to reconnect all the disconnected connectors.
•  Clear the DTC from memory using the IDS/PDS.
•  Perform the “After Repair Procedure”.
•  Are any DTCs present?
Yes
Replace the TCM, then go to the next step.
(See TCM REMOVAL/INSTALLATION [5R55S].)
No
Go to the next step.
9
VERIFY DTCS
•  Are DTCs except for U0100 and U0297 output?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [5R55S].)
No
DTC troubleshooting completed.