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.

NO COMMUNICATION WITH ANTI-LOCK BRAKE SYSTEM (ABS) MODULE - PINPOINT TEST REFERENCE

PINPOINT TEST 1		NO COMMUNICATION WITH THE ANTI-LOCK BRAKE SYSTEM (ABS) MODULE
STEP	INSPECTION		ACTION
1	CHECK CIRCUITS (Y/V), (W/R) AND (R) FOR VOLTAGE Key OFF. Disconnect: ABS module connector. Key ON. Measure the voltage between ground and: ABS module circuit (Y/V), harness side. ABS module circuit (W/R), harness side. ABS module circuit (R), 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 (R) for an open. Verify BJB fuse 33 (30A) is OK. If OK, repair circuit (W/R) for an open. Verify SJB fuse 20 (10A) is OK. If OK, repair circuit (Y/V) 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 circuit (B), harness side. ABS module 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.