DTC Troubleshooting: U1261 (107-21)
DTC U1261:
 F-CAN Malfunction (TCM Lost Communication with ABS/VSA Modulator-Control Unit)
NOTE: If DTC U1261 is stored at the same time as DTC U1405, troubleshoot DTC U1261 first, then recheck for DTC U1405.
  1. Turn the ignition switch ON (II).
  1. Clear the DTCs with the HDS.
  1. Turn the ignition switch OFF.
  1. Turn the ignition switch ON (II).
  1. Check for DTCs with the HDS.
Is DTC U1261 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 U0100, U0103, and U0155 indicated?
YES -
Go to Step 7 .
NO -
Go to Step 12 .
  1. Turn the ignition switch OFF.
  1. Disconnect the ABS modulator-control unit 26P connector (or the VSA modulator-control unit 46P connector).
  1. Disconnect the clutch actuator subharness 10P connector from the engine compartment wire harness.
  1. With ABS: Connect ABS modulator-control unit 26P connector terminal No. 12 (No. 1) * and body ground with jumper wires.
    With VSA: Connect VSA modulator-control unit 46P connector terminal No. 39 (No. 38) * and body ground with jumper wires.
    *: CANL