Possible Causes

CAUTION:

Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.

PINPOINT TEST 1 CHART - NO COMMUNICATION WITH ANTI-LOCK BRAKE SYSTEM MODULE

PINPOINT TEST 1		VIBRATION WHEN BRAKES ARE APPLIED
STEP	INSPECTION		ACTION
1	CHECK CIRCUITS (R), (Y/LG) AND (R) FOR VOLTAGE Key OFF. Disconnect: ABS module 0413-102. Key ON. Measure the voltage between ground and: ABS module 0413-102 pin 20, circuit (R), harness side. ABS module 0413-102 pin 11, circuit (R), harness side. ABS module 0413-102 pin 28, circuit (Y/LG), harness side. Are the voltages greater than 10 volts?	Yes	Go to next step.
1		No	Verify battery junction box (BJB) fuse 17 (40A) is OK. If OK, repair circuit (Y/LG) for an open. Verify BJB fuse 33 (30A) is OK. If OK, repair circuit (R) for an open. Verify SJB fuse 20 (10A) is OK. If OK, repair circuit (R) for an open. Clear the DTCs. Repeat the self-test with the brake pedal not applied.
2	CHECK CIRCUIT (B) FOR AN OPEN Key OFF. Measure the resistance between ground and: ABS module 0413-102 pin 1, circuit (B), harness side. ABS module 0413-102 pin 18, circuit (B), harness side. Are the resistances less than 5 ohms?	Yes	Check the module communications network. See COMMUNICATIONS NETWORK to diagnose the module communication network.
2		No	Repair circuit (B) for an open. Clear the DTCs. Repeat the self-test with the brake pedal not applied.