Code B667, Set/Coast Or Resume/ACCEL Circuit Shorted: Notes

When cruise control ON/OFF switch is turned to the ON position and brake is released, system voltage is available at one side of normally open contacts on SET/COAST and RESUME/ACCEL switches. If SET/COAST or RESUME/ACCEL switches were stuck, or their signal wires to BCM were shorted to voltage, vehicle could begin cruise operation. In order to prevent this occurrence, Code B667 will set and disable cruise control, if signal voltage from SET/COAST circuit No. 84 or RESUME/ACCEL circuit No. 87, is high when cruise control ON/OFF switch is turned from OFF position to ON position or when ignition key is turned on and cruise control ON/OFF switch was left in the ON position. Cruise control will be disabled until BCM sees a low on both of these signals.

NOTE: Test numbers refer to numbers on diagnostic chart.

Test Number 1) BI76 and BI77 will display SET/COAST and RESUME/ACCEL switch status as HI or LO, depending on voltage state at BCM. If one of these inputs stays HI when switches are cycled, that particular switch or signal wire is shorted to voltage.

Test Number 2) This step checks if short circuit reading is due to switch or circuit.