Initial Inspection and Diagnostic Overview

Inspection and Verification

CAUTION: Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does not guarantee confirmation of a fault, and may also cause additional faults in the vehicle being tested and/or the donor vehicle.
1 Verify the customer concern.
2 Visually inspect for obvious signs of mechanical or electrical damage and system integrity.





3 If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4 If the cause is not visually evident, check for Diagnostic Trouble Codes (DTCs) and refer to relevant DTC Index.

DTC Index

NOTE:
If the control module or a component is suspect and the vehicle remains under manufacturer warranty, refer to the Warranty Policy and Procedures manual (section B1.2), or determine if any prior approval programme is in operation, prior to the installation of a new module/component.

NOTE:
Generic scan tools may not read the codes listed, or may read only five digit codes. Match the five digits from the scan tool to the first five digits of the seven digit code listed to identify the fault (the last two digits give extra information read by the manufacturer-approved diagnostic system).

NOTE:
When performing voltage or resistance tests, always use a digital multimeter (DMM) accurate to three decimal places and with a current calibration certificate. When testing resistance, always take the resistance of the DMM leads into account.

NOTE:
Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.

NOTE:
Inspect connectors for signs of water ingress, and pins for damage and/or corrosion.

NOTE:
If DTCs are recorded and, after performing the pinpoint tests, a fault is not present, an intermittent concern may be the cause. Always check for loose connections and corroded terminals.

Information and Entertainment Module (Low Line)
For additional information, refer to Diagnostic Trouble Code (DTC) Index - DTC: Infotainment Control Module (ICM) - Low Line Infotainment Control Module (ICM) - Low Line

Information and Entertainment Module (High Line)
For additional information, refer to Diagnostic Trouble Code (DTC) Index - DTC: Infotainment Control Module (ICM) - High Line Infotainment Control Module (ICM) - High Line

Audio Front Control Module (ACM)
For additional information, refer to Diagnostic Trouble Code (DTC) Index - DTC: Audio Front Control Module (ACM) Audio Front Control Module (ACM)

Audio Amplifier Module (AAM)
For additional information, refer to Diagnostic Trouble Code (DTC) Index - DTC: Audio Amplifier Module (AAM) Audio Amplifier Module (AAM)

Front Control Display Interface Module (FCDIM) (high level display front)
For additional information, refer to Diagnostic Trouble Code (DTC) Index - DTC: Front Controls Display Interface Module (FCDIM) - Front Integrated Control Panel Front Controls Display Interface Module (FCDIM) - Front Integrated Control Panel

Navigation Control Module (NCM)
For additional information, refer to Diagnostic Trouble Code (DTC) Index - DTC: Navigation Control Module (NAV) Navigation Control Module (NAV)

Satellite Radio Module (SRM)
For additional information, refer to Diagnostic Trouble Code (DTC) Index - DTC: Satellite Digital Audio Radio System Module (SARM) Satellite Digital Audio Radio System Module (SARM)

Digital Audio Broadcast Module (DAB)
For additional information, refer to Diagnostic Trouble Code (DTC) Index - DTC: Digital Audio Broadcast Module (DABM) Digital Audio Broadcast Module (DABM)

High Definition Tuner Module (HDR)
For additional information, refer to Diagnostic Trouble Code (DTC) Index - DTC: High Definition Radio Module (HDR) High Definition Radio Module (HDR)