Inhibitor Switch (A/T)

DTC 51
INHIBITOR SWITCH (AT)






Diagnosis
- The Park/Neutral Position Switch signal is abnormal.
- The shift cable is connected abnormally.
- The harness connector between Engine Control Module (ECM) and Inhibitor Switch is short or open.

Trouble Symptom
Erroneous idling.

1. Check input signal for ECM.
a. Turn Ignition Switch to "ON".






b. Measure voltage between ECM and body.

Connector & Terminal / Specified Voltage:
(E29) No. 16 - Body /
"P" or "N" Position.....10 - 14 Volts
Other Positions.......0 Volts

2. Check harness connector between ECM and Inhibitor Switch.
a. Turn Ignition Switch to "OFF".
b. Disconnect connectors from ECM and Transmission harness.






c. Measure resistance of harness connector between ECM and Transmission harness.

Connector & Terminal / Specified Resistance:
(E29) No. 16 - (B8) No. 1 / 10 Ohms, maximum
(E29) No. 16 - (B8) No. 3 / 10 Ohms, maximum






d. Measure resistance harness connector between ECM and body to make sure that circuit does not short.

Connector & Terminal / Specified Resistance:
(E29) No. 16 - Body / 1 M-Ohm, minimum