|
|
3. O2 SENSOR Measure the voltage on the (K904) O2 Downstream Return circuit in the Is the voltage at 2.5 volts? Yes >> Replace the O2 Sensor. Perform the POWERTRAIN VERIFICATION TEST. (Refer to No >> Go To 4 4. (K904) O2 DOWNSTREAM RETURN CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the C2 PCM harness connector. Measure the resistance between ground and the (K904) O2 Down- Is the resistance below 100 ohms? Yes >> Repair the short to ground in the (K904) O2 Downstream Return circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer to No >> Go To 8 5. (K243) O2 2/2 SIGNAL CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the C1 and C2 PCM harness connectors. Measure the resistance between ground and the (K243) O2 2/2 Signal Is the resistance below 100 ohms? Yes >> Repair the short to ground in the (K243) O2 2/2 Signal cir- cuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer to No >> Go To 6 9 - 170 ENGINE ELECTRICAL DIAGNOSTICS KJ |