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P0052-O2 SENSOR 2/1 HEATER CIRCUIT HIGH (CONTINUED) 3. (K199) O2 2/1 HEATER CONTROL CIRCUIT Ignition on, engine not running. With the scan tool, actuate the O2 Heater Test with the Sensor har- Using a 12-volt test light connected to ground, probe the (K199) O2 Does the test light illuminate brightly and flash on and off dur- Yes >> Go To 4 No >> Go To 5 4. (Z934) O2 2/1 HEATER GROUND CIRCUIT OPEN Turn the ignition off. Measure the resistance between an engine ground and the (Z934) O2 Is the resistance below 5.0 ohms? Yes >> Replace the O2 Sensor. Perform the POWERTRAIN VERIFICATION TEST. (Refer No >> Repair the open in the (Z934) O2 2/1 Heater ground cir- cuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer 9 - 38 ENGINE - ELECTRICAL DIAGNOSTICS - 3.7L/4.7L/5.7L DR/DH |