Test A: No Communication With Driver's Door Module
NOTE:
Ignition switch must be cycled from LOCK to RUN position to enable Switched System Power (SSP) feature. Always enable SSP feature before proceeding with test procedures.
- Turn ignition switch to LOCK position. Disconnect Driver's Door Module (DDM) 12-pin harness connector C501a. DDM is located behind driver's door panel. See Fig 1 . Turn ignition switch to RUN position. Measure voltage between ground and DDM harness connector C501a terminals No. 11 (Orange wire) and No. 12 (Orange/Blue wire). See Fig 2 . If battery voltage exists at both terminals, go to next step. If battery voltage does not exist at both terminals, repair power distribution circuit as necessary. See POWER DISTRIBUTION article in WIRING DIAGRAMS.
- Turn ignition switch to LOCK position. Measure resistance between ground and DDM harness connector C501a terminals No. 7 (Brown/Blue wire) and No. 8 (Black/Orange wire). If both resistances are less than 5 ohms, repair module communications concern. See MODULE COMMUNICATIONS NETWORK - LS article. If any resistance is 5 ohms or more, repair open in appropriate wire between ground and DDM. See GROUND DISTRIBUTION article in WIRING DIAGRAMS.