DTC B1422: Device Power MODING Malfunction: Testing
- If body control system diagnostic system check has been performed, go to next step. If body control system diagnostic system check has not been performed, go to BODY CONTROL SYSTEM DIAGNOSTIC SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM.
- Connect scan tool to Data Link Connector (DLC). See Figure . Turn ignition off. Using scan tool, monitor ignition switch parameters in Dash Integration Module (DIM) data list. If all ignition switch parameters display INACTIVE, go to next step. If all ignition switch parameters do not display INACTIVE, go to step 7 .
- Turn ignition on. Monitor ignition switch parameters. If all ignition switch parameters display ACTIVE, go to next step. If all ignition switch parameters do not display ACTIVE, go to step 9 .
- Turn ignition to Crank position. If ignition switch RUN/CRANK parameters displays ACTIVE, go to next step. If ignition switch RUN/CRANK parameters do not display ACTIVE, go to step 7 .
- Turn ignition to Unlock position. If ignition switch IGN. UNLOCK parameter display ACTIVE, go to next step. If ignition switch IGN. UNLOCK parameter does not display ACTIVE, go to step 7 .
- Turn ignition to Accessory position. If ignition switch IGN. ACCESSORY and IGN. UNLOCK parameters do not display ACTIVE, go to next step. If ignition switch IGN. ACCESSORY and IGN. UNLOCK parameters display ACTIVE, go to step 11 .
- Turn ignition off. Disconnect ignition switch connectors. See Figure . Using scan tool, monitor ignition switch parameters. If status does not change from ACTIVE to INACTIVE, go to next step. If status changes from ACTIVE to INACTIVE, go to step 10 .
- Check for short to voltage in ACTIVE power moding signal circuits between ignition switch and DIM. See Figure
and Fig 1
.
- CRANK - Pink wire between ignition switch connector terminal No. 7 and DIM connector C3 terminal A3.
- ACC/ON
Brown wire between ignition switch connector terminal No. 8, underhood fuse block connector C2 terminal D2 and DIM connector C3 terminal A2. See Fig 2 . - ON
Orange wire between ignition switch connector terminal No. 5, rear fuse block connector C1 terminal A11 and DIM connector C3 terminal B1. See Fig 3 . - ACC/ON/CRANK
White wire between ignition switch connector terminal No. 10 and DIM connector C3 terminal A1.
If circuits are okay, go to step 11 . If faulty circuit is found and repaired, go to step 14 .
- Check for open or high resistance in INACTIVE power moding signal circuits between ignition switch and DIM. See Fig 1 and Figure . See step 8 for circuit identification. If circuits are okay, go to step 11 . If faulty circuit is found and repaired, go to step 14 .
- Check for poor connections at ignition switch. If connections are okay, go to step 12 . If faulty connections are found and repaired, go to step 14 .
- Check for poor connections at DIM. If connections are okay, go to step 13 . If faulty connections are found and repaired, go to step 14 .
- Replace ignition switch. See IGNITION & KEY ALARM SWITCH ASSEMBLY under REMOVAL & INSTALLATION in STEERING COLUMN SWITCHES - DEVILLE article. After repairs, go to step 14 .
- Replace DIM. See DASH INTEGRATION MODULE under REMOVAL & INSTALLATION. After repairs, go to next step.
- Use scan tool to clear DTCs. Operate vehicle and recheck for DTCs. If DTC B1422 resets, go to step 2 . If DTC does not reset, system is okay at this time.