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Measure the voltage on the (K2) ECT Signal circuit and the (G31) AAT Is the voltage above 5.2 volts? Yes >> Repair the short to battery voltage in the Signal circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer to No >> Go To 8 8. TEMPERATURE SENSOR Turn the ignition off. Connect the C2 PCM harness connector. Connect the C2 BCM harness connector if the vehicle is equipped with Connect a jumper wire across the ECT and AAT Sensor harness con- Ignition on, engine not running. With a scan tool, read the Temperature Sensor voltage. Does the voltage start at 5.0 volts and drop below 1.0 volt Yes >> Replace the appropriate Temperature Sensor. Perform the POWERTRAIN VERIFICATION TEST. (Refer to No >> Go To 9 9 - 110 ENGINE ELECTRICAL DIAGNOSTICS KJ |