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P2099-DOWNSTREAM FUEL TRIM SYSTEM 2 RICH (CONTINUED) 6. (K399) O2 SENSOR 2/2 HEATER CONTROL CIRCUIT OPEN Turn the ignition off. Disconnect the C3 PCM harness connector. CAUTION: Do not probe the PCM harness connectors. Probing Is the resistance below 5.0 ohms? Yes >> Go To 7 No >> Repair the open in the (K399) O2 Sensor 2/2 Heater Con- trol circuit. Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 9 - 662 ENGINE ELECTRICAL DIAGNOSTICS ND |