Test Q: The Accessory Protocol Interface Module (APIM) Does Not Respond To The Scan Tool

PINPOINT TEST Q: THE ACCESSORY PROTOCOL INTERFACE MODULE (APIM) DOES NOT RESPOND TO THE SCAN TOOL

Normal Operation
The accessory protocol interface module (APIM) communicates with the scan tool through the high speed controller area network (HS-CAN). Circuits VDB04 (WH/BU) (HS-CAN +) and VDB05 (WH) (HS-CAN -) provide the HS-CAN connection to the APIM. Circuits VDB06 (GY/OG) (MS-CAN +) and VDB07 (VT/OG) (MS-CAN -) provide the MS-CAN connection to the APIM. Voltage for the APIM is provided by circuit SBB13 (GY/RD). Circuit GD148 (BK/YE) provides ground. The APIM shares the HS-CAN with the PCM, the ABS module, the instrument cluster (IC), the occupant classification system module (OCSM), the transmission control module (TCM) and the restraints control module (RCM).

The APIM shares the MS-CAN with the audio control module (ACM), the parking aid module (PAM), the driver seat module (DSM), the driver door module (DDM), the dual climate control seat module (DCSM), the audio digital signal processing (DSP) module, the satellite digital audio receiver system (SDARS) module, the HVAC module, the instrument cluster (IC) and the smart junction box (SJB).

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- APIM

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