Test S
PINPOINT TEST S: DTC C2777 AND DTC C2778-SENSOR CLUSTER BUS FAILURETests S1 - S2:
Tests S3 - S8:
Normal Operation
The yaw rate sensor and accelerometer are part of the sensor cluster which sends various signals about the vehicle's dynamics through a two-wire bus CAN HI 8-CF66 (WH/BU) and CAN LOW 9-CF66 (BN/BU). The CAN bus receives a twelve-volt input through circuit 7-CF67 (YE/RD) in series with the steering wheel rotation sensor circuitry. Ground is provided through circuit 9-CF67 (BN/RD).
Possible Causes
^ power circuit 7-CF67 (YE/RD)
^ ground circuit 9-CF67 (BN/RD)
^ steering wheel rotation sensor
^ CAN HI 8-CF66 (WH/BU)
^ CAN LOW 9-CF66 (BN/BU)
^ sensor cluster
^ ABS module
NOTE: Check all pins of the sensor cluster and ABS module when removing connectors. Care should be taken when reinstalling these connectors.