Test Description
Diagnosing DTCs in correct order is important. Failure to diagnose DTCs in order specified may result in extended diagnostic time, incorrect diagnosis and incorrect part replacement.
NOTE:
Following step references refer to test step numbers on diagnostic chart. See Fig 1
and Fig 2
. For circuit number and wire color identification, see WIRING DIAGRAMS
.
- This test checks if malfunction is in AIR BAG warning lamp circuit or in instrument cluster power feed.
- This test checks for open between instrument cluster and SDM in AIR BAG warning lamp circuit.
- This test checks if open is due to bad bulb.
- This test checks for open in instrument cluster.
- This test checks if malfunction is due to short from AIR BAG warning lamp circuit to B+.
- This test checks for open in air bag harness.
- This test checks for short to B+ in air bag harness.
- This test checks if COMBINATION METER fuse is open.
- An open COMBINATION METER fuse would cause lamps of instrument cluster to go off.
- This test checks for short to ground in instrument panel harness.
- This test checks if malfunction is due to open power feed circuit from COMBINATION METER fuse to 16P connector B/W wire terminal.