Diagnostic Test
CHECK FOR AN ACTIVE DTC
On vehicles equipped with the high voltage system, you must thoroughly read and follow all High Voltage Safety procedures. In addition, before performing any diagnostic or service procedure near a high voltage component, you must perform the High Voltage Power Down. Failure to follow these instructions may result in possible serious or fatal injury.
Read the HIGH-VOLTAGE SAFETY PROCEDURES. Refer to HIGH VOLTAGE SAFETY PROCEDURES .
When the HIGH-VOLTAGE POWER-DOWN PROCEDURE is necessary. Refer to VEHICLE HIGH VOLTAGE POWER DOWN .
Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
Do not place an intact non-deployed airbag face down on a hard surface, the airbag propels into the air if accidentally deployed. Failure to follow these instructions may result in possible serious or fatal injury.
- Turn the ignition on.
- With the scan tool, read DTCs and record on the repair order.
Is the DTC active or pending?
Yes
NOTE:Visually and physically inspect the wiring harness and connections between the BCM C8 harness connector and the SCCM harness connector. Repair any damaged wires, connectors, and open/spread terminals. If harness is OK, proceed with test.
- Replace the Speed Control Switch in accordance with the Service Information. Refer to SWITCH, SPEED CONTROL, REMOVAL AND INSTALLATION .
- Perform the Electric Vehicle Control Unit (EVCU) VERIFICATION TEST. Refer to ELECTRIC VEHICLE CONTROL UNIT (EVCU) VERIFICATION TEST .
No
- Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .