Test 32A: Driver Seat Belt Switch Short To Battery

WARNING: This page is about a different car, the 2002 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Prior to performing any air bag system test, go to PRETEST INSPECTION & DIAGNOSTIC PROCEDURE under DIAGNOSTICS. Perform TEST VER-1: AIR BAG VERIFICATION TEST after all repairs unless otherwise directed.
Air Bag Control Module (ACM) harness connectors C1 and C2 are identical, except for wire colors and terminal usage. See WIRING DIAGRAMS .

Turn ignition switch to ON position. Using DRBIII, determine if DRIVER SEAT BELT SWITCH SHORT TO BATTERY is active or stored Diagnostic Trouble Code (DTC). If DRIVER SEAT BELT SWITCH SHORT TO BATTERY is an active DTC, go to next step. If DRIVER SEAT BELT SWITCH SHORT TO BATTERY is a stored DTC, go to TEST 1B: REPAIRING STORED CODES .
Turn ignition switch to OFF position. Disconnect driver-side front seat belt switch connector. See SEAT BELT SWITCH under REMOVAL & INSTALLATION. Connect DRBIII to DLC. Turn ignition switch to ON position. On DRBIII display, read active DTCs. If DRBIII displays DRIVER SEAT BELT SWITCH CIRCUIT OPEN, replace driver-side seat belt switch. If DRBIII does not display DRIVER SEAT BELT SWITCH CIRCUIT OPEN, go to next step.
Disable air bag system. See DISABLING SYSTEM under DISABLING & ACTIVATING AIR BAG SYSTEM. Access and disconnect ACM harness connector C2. See AIR BAG CONTROL MODULE (ACM) under REMOVAL & INSTALLATION. Turn ignition switch to ON position. Connect negative battery cable. Measure voltage in Dark Green wire (line 1 circuit) between ground and harness side of seat belt switch connector. See WIRING DIAGRAMS . Measure voltage in Light Blue wire (line 1 circuit) between ground and harness side of seat belt switch connector. If voltage is not present in both circuits, replace ACM. If voltage is present in either circuit, repair short to battery in appropriate wire.