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DTC 55


DTC 55
RECIRCULATION GAS TEMPERATURE SENSOR






Diagnosis
- The Recirculation Gas Temperature Sensor is not functioning.
- The harness connector between Engine Control Module (ECM) and Recirculation Gas Temperature Sensor is short or open.

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






b. Measure signal voltage between ECM and body.

Connector & Terminal / Specified Voltage:
(E31) No. 4 - Body / 4 - 4.9 Volts at 20°C (68°F).
(E31) No. 4 - Body / 0.4 - 1.2 Volts at 100°C (212°F).


2. Check harness connector between ECM and Recirculation Gas Temperature Sensor.
a. Turn Ignition Switch to "OFF".
b. Disconnect connector from Recirculation Gas Temperature Sensor.






c. Measure resistance of harness connector between ECM and Recirculation Gas Temperature Sensor.

Connector a Terminal / Specified Resistance:
(E31) No. 4 - (E15) No. 1 / 10 Ohms, maximum







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

Connector & Terminal / Specified Resistance:
(E31) No. 4 - Body / 1 M-Ohm, maximum