Diagnostic Procedure

NO RESPONSE FROM CONTROLLER ANTILOCK BRAKE - DIAGNOSTIC PROCEDURE

TEST	ACTION	APPLICABILITY
1	Turn the ignition on. With the DRB attempt to communicate with the PCM. Was the DRB able to communicate with the PCM? Yes : Go To 2 No : Refer to symptom list for problems related to No Response From PCM. Perform ABS VERIFICATION TEST .	All
2	Turn the ignition off. Remove and inspect fuse #7 in the Fuse Block. Is the fuse open? Yes : Refer to SCHEMATIC DIAGRAMS to help isolate a possible short to ground. Perform ABS VERIFICATION TEST . No : Go To 3	All
3	Turn the ignition off. Disconnect the CAB harness connector. Using a 12-volt test light connected to 12-volts, probe each ground circuit. Is the test light illuminated for each circuit? Yes : Go To 4 No : Repair the ground circuit for an open. Perform ABS VERIFICATION TEST .	All
4	Turn the ignition off. NOTE: Ensure fuse #7 is installed in the Fuse Block. Disconnect the CAB harness connector. Turn the ignition on. Using a 12-volt test light connected to ground, probe the Fused Ignition Switch Output circuit. Is the test light illuminated? Yes : Go To 5 No : Repair the Fused Ignition Switch Output circuit for an open. Perform ABS VERIFICATION TEST .	All
5	Turn the ignition off. Disconnect the CAB harness connector. Measure the resistance of the SCI Transmit circuit between the CAB connector and the DLC. Is the resistance below 5.0 ohms? Yes : Go To 6 No : Repair the SCI Transmit circuit for an open. Perform ABS VERIFICATION TEST .	All
6	If there are no possible causes remaining, view repair. Repair : Replace the Controller Antilock Brake in accordance with the Service Information. Perform ABS VERIFICATION TEST .	All