System Operation Test

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NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION. For wiring diagram, see wiring diagram.

Turn ignition off. Disconnect CAB 60-pin connector. See Figure. Inspect, clean and repair connector as necessary. Using scan tool in voltmeter mode, check voltage on CAB connector terminal No. 13 (White/Tan wire) while depressing brake pedal. If reading is less than 9 volts, repair White/Tan wire as necessary. Perform TEST VER-1A. If reading is more than 9 volts, replace CAB. Perform TEST VER-1A.