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Home >> Dodge and Ram >> 2003 >> Durango Base, 5.9 Z, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 31 (Air Bag Restraint Systems) >> Diagnostic Tests >> Test 2A: Loss Of Ignition Run Only

Test 2A: Loss Of Ignition Run Only

WARNING: This page is about a different car, the 2004 Dodge Dakota. 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.
  1. Turn ignition switch to ON position. Using DRBIII, determine if LOSS OF IGNITION RUN ONLY is an active or stored Diagnostic Trouble Code (DTC). If LOSS OF IGNITION RUN ONLY is an active DTC, go to next step. If LOSS OF IGNITION RUN ONLY is a stored DTC, go to TEST 1B: REPAIRING STORED CODES .
  2. Turn ignition switch to OFF position. Remove and inspect air bag system ignition run fuse No. 21. If fuse is bad, go to next step. If fuse is good, go to step  5.
  3. Remove air bag system ignition run fuse No. 21. Measure resistance between ground and fused ignition switch side of fuse No. 21 cavity. See Fig 1. If resistance is less than 10 ohms, go to next step. If resistance is more than 10 ohms, replace defective fuse No. 21.
  4. Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Access Air Bag Control Module (ACM) and disconnect harness connector. See AIR BAG CONTROL MODULE (ACM)  under REMOVAL & INSTALLATION. Measure resistance between ground and ACM connector terminal No. 15. (Dark Blue/Yellow wire). See Fig 2. If resistance is less than 10 k/ohms, repair short to ground in Dark Blue/Yellow wire and replace fuse No. 21. If resistance is more than 10 k/ohms, replace ACM.
  5. Turn ignition switch to ON position. Measure voltage between ground and battery side of fuse No. 21 cavity. If voltage is more than 4.5 volts, go to next step. If voltage is less than 4.5 volts, repair open in ignition run circuit between battery and fuse holder.
  6. Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Access Air Bag Control Module (ACM) and disconnect harness connector. See AIR BAG CONTROL MODULE (ACM)  under REMOVAL & INSTALLATION. Install air bag system ignition run fuse No. 21. Turn ignition switch to ON position. Connect negative battery cable. Measure voltage between ground and harness side of ACM connector terminal No. 15. (Dark Blue/Yellow wire). See Fig 2. If voltage is less than 4.5 volts, repair open or high resistance in Dark Blue/Yellow wire. If voltage is more than 4.5 volts, replace ACM.
Fig 1: Identifying Air Bag Fuses
G99G23826Courtesy of DAIMLERCHRYSLER CORP.
Fig 2: Identifying Air Bag Control Module (ACM) Connector Terminals
G99H22373Courtesy of DAIMLERCHRYSLER CORP.
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