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DTC Troubleshooting: U0100 (107-11)

DTC U0100:
 F-CAN Malfunction (TCM Lost Communication with ECM)
  1. Turn the ignition switch to ON (II).
  1. Clear the DTCs with the HDS.
  1. Turn the ignition switch to LOCK (0).
  1. Turn the ignition switch to ON (II).
  1. Check for DTCs with the HDS.
Is DTC U0100 indicated?
YES -
Go to Step 6 .
NO -
Intermittent failure, the system is OK at this time.■
  1. Check for DTCs with the HDS.
Are DTC U0103, U0155, and U1261 indicated?
YES -
Go to Step 7 .
NO -
Go to Step 13 .
  1. Turn the ignition switch to LOCK (0).
  1. Wait for at least 30 seconds.
  1. Jump the SCS line with the HDS.
  1. Disconnect ECM connector A (49P).
  1. Disconnect the clutch actuator subharness 10P connector from the engine compartment wire harness.
  1. Check for continuity between ECM connector terminal A3 (A4) * and clutch actuator subharness 10P connector terminal No. 7 (No. 6) * .
    *: CANL
Is there continuity?
YES -
Remove the clutch actuator assembly, and check for change actuator subharness. If the wire harness is OK, substitute a known-good TCM, then recheck. If the symptom/indication goes away with a known-good TCM, replace the original TCM.
NO -
Repair an open in the wire between the clutch actuator subharness 10P connector and the ECM (A3 (A4) * ).■
*: CANL
  1. Turn the ignition switch to LOCK (0).
  1. Wait for at least 30 seconds.
  1. Jump the SCS line with the HDS.
  1. Disconnect ECM connector A (49P).
  1. Disconnect the clutch actuator subharness 10P connector from the engine compartment wire harness.

  1. Check for continuity between ECM connector terminal A3 (A4) * and clutch actuator subharness 10P connector terminal No. 7 (No. 6) * .
    *: CANL
Is there continuity?
YES -
NO -
Repair an open in the wire between the clutch actuator subharness 10P connector and the ECM (A3 (A4) * ).■
*: CANL