Diagnostic Test

1) AMBIENT TEMPERATURE SENSOR
NOTE: Diagnose and repair any PCM, EVIC or Communication DTCs before proceeding with this test.

NOTE: The Ambient Temperature Sensor is hardwired to the PCM. Ambient temperature information is transmitted to the EVIC via the PCI Bus.

Turn the ignition off.

Disconnect the Ambient Temperature Sensor harness connector.

Measure the resistance of the Ambient Temperature Sensor using the following temperature/resistance values:

10°C (50°F) Sensor Resistance = 17.99 - 21.81 Kilohms

20°C (68°F) Sensor Resistance = 11.37 - 13.61 Kilohms

25°C (77°F) Sensor Resistance = 9.12 - 10.88 Kilohms

30°C (86°F) Sensor Resistance = 7.37 - 8.75 Kilohms

40°C (104°F) Sensor Resistance = 4.90 - 5.75 Kilohms

50°C (122°F) Sensor Resistance = 3.33 - 3.88 Kilohms

Is the Ambient Temperature Sensor resistance measurement between the min/max specifications?

Yes
1. Go To step 2).
No
1. Replace the Ambient Temperature Sensor. NOTE: After any repair for an Ambient Temperature Sensor problem, the vehicle must be driven over 5 kilometers (3 miles) above 40 km/h (25 MPH) to update the EVIC display.
2. Perform BODY VERIFICATION TEST .
2) EVIC INOPERATIVE
Perform the EVIC self test.

Turn the ignition off.

Press and hold the C/T and Reset buttons.

Turn the ignition on.

NOTE: The self test can also be performed using the scan tool.

Observe the EVIC display at the conclusion of the self test.

Does the EVIC display "PASSED SELF TEST"?

Yes
1. Test Complete.
No
1. Replace the EVIC in accordance with the Service Information.
2. Perform BODY VERIFICATION TEST .