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DTC Troubleshooting: U1404 (135-21)

DTC U1404:
 F-CAN Malfunction (TCM Received Out of Range Data from ABS/VSA Modulator-Control Unit)
  1. Turn the ignition switch to ON (II).
  1. Clear the DTCs with the HDS.
  1. Test-drive the vehicle for several minutes.
  1. Check for DTCs with the HDS.
Is DTC U1404 indicated?
YES -
Go to Step 5 .
NO -
Intermittent failure, the system is OK at this time.■
  1. Check for ABS (VSA) system DTCs with the HDS.
Are any ABS (VSA) system DTCs indicated?
YES -
NO -
Go to Step 6 .
  1. Test-drive the vehicle for at least 10 km/h (6.2 mph).
  1. Check each WHEEL SENSOR in the DATA LIST with the HDS.
Does any of wheel speeds indicate 2,594 rpm?
YES -
Substitute a known-good VSA modulator-control unit, then recheck. If the symptom/indication goes away with a known-good VSA modulator-control unit, replace the original VSA modulator-control unit.
NO -
Remove the clutch actuator assembly, and substitute a known-good TCM, then recheck. If the symptom/indication goes away with a known-good TCM, replace the original TCM.