Pinpoint Test 30: DTC U0121 - Lost Communication With Anti-Lock brake System Control Module (ABS)
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PINPOINT TEST 30: DTC U0121 - LOST COMMUNICATION WITH ANTI-LOCK BRAKE SYSTEM CONTROL MODULE (ABS)
Normal Operation
The instrument cluster sets DTC U0121 in continuous memory if data messages received from the ABS module over the high speed controller area network (HS-CAN) are missing. For a complete list of all network messages, see Communications Network.
Possible Causes
- ABS module
- Instrument cluster
Diagnostic Procedure
