|
|
3. O2 SENSOR Ignition on, engine not running. With a scan tool, actuate the O2 1/1 Heater Test with the O2 Sensor Using a 12-volt test light connected to ground, probe the (K99) O2 1/1 Does the test light illuminate brightly and flash on and off dur- Yes >> Replace the O2 Sensor. Perform the POWERTRAIN VERIFICATION TEST. (Refer to No >> Go To 4 4. (K99) O2 1/1 HEATER CONTROL CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the C2 PCM harness connector. Measure the resistance between ground and the (K99) O2 1/1 Heater Is the resistance below 5.0 ohms? Yes >> Repair the short to ground in the (K99) O2 1/1 Heater Con- trol circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer to No >> Go To 5 5. PCM NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal Were there any problems found? Yes >> Repair as necessary. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Replace and program the Powertrain Control Module per Service Information. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 9 - 14 ENGINE ELECTRICAL DIAGNOSTICS KJ |