H: C1279, C1280, C1281, C1282, C1516, C1517, C2769, C2770, U1900, U1901, and U2023 Sensor Cluster Fault

Pinpoint Test H: DTC C1279, C1280, C1281, C1282, C1516, C1517, C2769, C2770, U1900, U1901, and U2023 Sensor Cluster Fault

Normal Operation
The yaw rate sensor, roll rate sensor, lateral accelerometer and longitudinal accelerometer are contained in the sensor cluster. The sensor cluster measures the vehicle acceleration, roll rate, and yaw rate, then sends the signal through the Controller Area Network (CAN) communication wires to the anti-lock brake system (ABS) module.

Voltage is supplied by circuit 1574 (DB). Ground is provided through circuit 1575 (BK/WH). The CAN communication is transmitted through circuit 1878 (WH/BK) and circuit 1879 (PK/BK).

Possible Causes
^ circuit 1574 (DB) open or short to ground
^ circuit 1575 (WH/BK) open, short to voltage, or short to ground
^ circuit 1878 (WH/BK) open, short to voltage, or short to ground
^ circuit 1879 (PK/BK) open, short to voltage, or short to ground
^ sensor cluster (also called accelerometer)
^ ABS module

Tests H1 - H3:

Tests H4 - H6:

Tests H7 - H8:

Tests H8 (continued) - H10:

PINPOINT TEST H: DTC C1279, C1280, C1281, C1282, C1516, C1517, C2769, C2770, U1900, U1901, AND U2023 SENSOR CLUSTER FAULT

CAUTION: Use the flex probe kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.

NOTE: The yaw rate sensor, roll rate sensor, lateral accelerometer, and longitudinal accelerometer are integral to the sensor cluster.

NOTE: The vehicle must be on level ground, not on a hoist and at a complete standstill. Any vehicle movement results in false values for this test.