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"D" Indicator Light Inoperative

WARNING: This page is about a different variant/trim than selected.
  1. Turn ignition off. Ensure service check connector is not jumpered. See Figure. Turn ignition on. Place selector lever in "D" position. If "D" indicator light does not illuminate, go to next step. If "D" indicator light illuminates, check for loose PCM connectors. If connectors are okay, substitute a known-good PCM and retest system.
  2. Turn ignition off. Disconnect PCM harness connector "B". Check for continuity between PCM harness connector "B" terminal No. 20 (Brown/Black wire) and ground, and between terminal No. 22 (Brown/Black wire) and ground. If continuity is present, go to next step. If continuity is not present, repair open in appropriate Brown/Black wire.
  3. Turn ignition on. Measure voltage between PCM harness connector "B" terminals No. 1 (Yellow/Black wire) and No. 22 (Brown/Black wire), and between terminals No. 9 (Yellow/Black wire) and No. 20 (Brown/Black wire). If battery voltage is present, go to next step. If battery voltage is not present, repair open or short in appropriate Yellow/Black wire between PCM and PGM-FI main relay and underhood fuse/relay box.
  4. Turn ignition off. Reconnect PCM harness connector "B". Check for voltage (backprobe) between PCM harness connector "A" terminal No. 14 (Green/Black wire) and connector "B" terminal No. 20 or 22 (Green/Black wire). Turn ignition on. If voltage is present for 2 seconds, check for open Green/Black wire between PCM harness connector "A" and gauge assembly. Repair as necessary. If wire is okay, repair faulty "D" indicator bulb or gauge assembly printed circuit board. If no voltage was indicated, go to next step.
  5. Turn ignition off. Check for continuity between PCM harness connector "A" terminal No. 14 (Green/Black wire) and gauge assembly harness connector "A" terminal No. 9 (Green/Black wire). If continuity is present, go to next step. If continuity is not present, repair open in Green/Black wire between PCM harness connector and gauge assembly.
  6. Check for continuity between PCM harness connector "A" terminal No. 14 (Green/Black wire) and ground. If continuity is not present, go to next step. If continuity is present, repair short to ground in Green/Black wire between PCM harness connector "A" and gauge assembly.
  7. Check for loose PCM connectors or faulty A/T gear position switch. Repair as necessary. If no problem is found, substitute a known-good PCM and recheck system.
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