Pinpoint Test 5: DTCs C2777, U0151, U0452 And U1901

PINPOINT TEST 5: DTCs C2777, U0151, U0452 AND U1901

Normal Operation

The stability/traction control system sensors consist of the yaw rate sensor, roll rate sensor, lateral accelerometer and longitudinal accelerometer. The stability/traction control system sensors are contained within the Restraints Control Module (RCM). The RCM provides the ABS module with the sensor information along a dedicated Controller Area Network 2 (CAN2) bus.The stability/traction control system sensors are not serviceable separately from the RCM. If a new sensor/accelerometer is needed, a new RCM must be installed.

- DTC C2777 (Sensor Cluster Bus Failure) - An open or short to power or ground in one of the CAN2 bus circuits, a communications concern on the High Speed Controller Area Network (HS-CAN) bus or an internal failure of the sensor can cause one or more of these DTCs to set.
- DTC U0151 (Lost Communication With Restraints Control Module) - An open or short to power or ground in one of the CAN2 bus circuits, a communications concern on the High Speed Controller Area Network (HS-CAN) bus or an internal failure of the sensor can cause one or more of these DTCs to set.
- DTC U0452 (Invalid Data Received From Restraints Control Module) - An open or short to power or ground in one of the CAN2 bus circuits, a communications concern on the High Speed Controller Area Network (HS-CAN) bus or an internal failure of the sensor can cause one or more of these DTCs to set.
- DTC U1901 (CAN Network No. 2 Communication Bus Fault - Receive Error) - An open or short to power or ground in one of the CAN2 bus circuits, a communications concern on the High Speed Controller Area Network (HS-CAN) bus or an internal failure of the sensor can cause one or more of these DTCs to set.

Possible Causes
- Wiring, terminals or connectors
- RCM
- ABS module

Diagnostic Procedure

CAUTION:Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE:The Electronic Stability Control (ESC) sensors are integral to the RCM. If a new ESC sensor is needed, a new RCM must be installed.