Test N: The Driver Door Module (DDM) Does Not Respond To The Scan Tool

PINPOINT TEST N: THE DRIVER DOOR MODULE (DDM) DOES NOT RESPOND TO THE SCAN TOOL

Normal Operation
The driver door module (DDM) communicates with the scan tool through the medium speed controller area network (MS-CAN). Circuits VDB06 (GY/OG) (MS-CAN +) and VDB07 (VT/OG) (MS-CAN -) provide the network connection to the DDM. Voltage for the DDM is provided by circuit SBP15 (RD/WH). Circuit GD126 (BK/WH) provides ground.

The DDM shares the MS-CAN with the following modules
- Accessory protocol interface module (APIM) (if equipped)
- Audio control module (ACM)
- Audio digital signal processing (DSP) module (if equipped)
- Driver seat module (DSM) (if equipped)
- Dual climate control seat module (DCSM) (if equipped)
- Heating ventilation air conditioning (HVAC) module (if equipped)
- Instrument cluster (IC)
- Parking aid module (PAM) (if equipped)
- Satellite digital audio receiver system (SDARS) module (if equipped)
- Smart junction box (SJB)

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

N1:

N1-N3:

N3-N4: