Automatic Transmission Gear Position Signal: 3.2TL
- Turn ignition on. While observing gear indicator, shift transmission gear selector to each position. If gear indicator does not indicate correct gear position, see AUTO TRANS DIAGNOSIS - M5HA article in the AUTO TRANS DIAGNOSIS section. If gear indicator illuminates correctly for all positions, go to next step.
- Turn ignition off. Disconnect gauge assembly 16-pin connector. Turn ignition on. Backprobing, measure voltage between PCM 26-pin "A" connector terminal No. 26 (Brown/Black wire) and PCM 26-pin "E" connector terminal No. 24 (Yellow/Green wire). See Figure. If voltage is about 5 volts, go to step 4). If voltage is not about 5 volts, go to next step.
- Turn ignition off. Disconnect PCM 26-pin "E" connector. Check for continuity between ground and PCM 26-pin "E" harness connector terminal No. 24 (Yellow/Green wire). If continuity exists, repair short in Yellow/Green wire between PCM 26-pin "E" connector terminal No. 24 and gauge assembly 16-pin connector terminal No. 8. If continuity does not exist, substitute a known good PCM, then recheck for voltage. If voltage is about 5 volts, replace original PCM.
- Turn ignition off. Reconnect gauge assembly 16-pin connector. Set transmission to Neutral position. Start engine. Backprobing, measure voltage between PCM 26-pin "A" connector terminal No. 26 (Brown/Black wire) and PCM 26-pin "E" connector terminal No. 24. (Yellow/Green wire) See Figure. If voltage is less than one volt, go to next step. If voltage is not less than one volt, repair open in Yellow/Green wire between PCM 26-pin "E" connector terminal No. 24 and gauge assembly 16-pin "B" connector terminal No. 8.
- Set transmission to Park position. Backprobing, measure voltage between PCM 26-pin "A" connector terminal No. 26 and PCM 26-pin "E" connector terminal No. 24. See Figure. If voltage is less than one volt, A/T gear position signal is functioning properly. If voltage is not less than one volt, repair open in gauge assembly.