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*TEMPERATURE DISPLAY INACCURATE OR INOPERATIVE For the Electronic Overhead Module circuit diagram (Refer to 8 - ELECTRICAL/OVERHEAD CONSOLE - SCHE- For a complete wiring diagram Refer to Section 8W. Possible Causes AMBIENT TEMPERATURE SENSOR ELECTRONIC OVERHEAD MODULE 1. AMBIENT TEMPERATURE SENSOR NOTE: Diagnose and repair any FCM, EOM, PCM, or Communica- NOTE: The Ambient Temperature Sensor is hardwired to the FCM Disconnect the Ambient Temperature Sensor harness connector. Measure the resistance of the Ambient Temperature Sensor using the 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 within the min/max specifications? Yes >> Go To 2 No >> Replace the Ambient Temperature Sensor. Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1.) 2. ELECTRONIC OVERHEAD MODULE Perform the EOM self test. Turn the ignition off. Press and hold the C/T and Reset buttons. Turn the ignition on. NOTE: NOTE: The self test can also be performed using the DRBIII T . Observe the EOM display at the conclusion of the self test. Does the EOM display ( Passed Self Test ( ? Yes >> Test Complete. No >> Replace and configure the EOM in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1.) 8M - 20 OVERHEAD CONSOLE - ELECTRICAL DIAGNOSTICS DR/DH |