TEST
ACTION
APPLICABILITY
1
NOTE: If one of the O2 Sensors Signal or Return circuits are shorted to
voltage, the DRBIII
t will display all O2 Sensor voltage readings high.
NOTE: It is important to perform the diagnostics on the O2 Sensor that set
the DTC.
NOTE: After the repairs have been made, verify proper O2 Sensor operation.
If all the O2 Sensor voltage readings have not returned to normal, follow the
diagnostic procedure for the remaining O2 Sensors.
Start the engine.
Allow the engine to reach normal operating temperature.
With the DRBIII
t, read the O2 Sensor voltage.
Is the voltage above 3.99 volts?
All
Yes
→ Go To 2
No
→ Refer to the INTERMITTENT CONDITION symptom in the
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
2
Turn the ignition off.
Disconnect the O2 Sensor harness connector.
Ignition on, engine not running.
With the DRBIII
t, monitor the O2 Sensor voltage.
Is the O2 Sensor voltage below 4.8 volts?
All
Yes
→ Go To 3
No
→ Go To 5
3
Turn the ignition off.
Disconnect the O2 Sensor harness connector.
Ignition on, engine not running.
Measure the voltage on the O2 Return circuit in the O2 Sensor harness connector.
Is the voltage at 2.5 volts?
All
Yes
→ Replace the O2 Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
No
→ Go To 4
4
Turn the ignition off.
Disconnect the O2 Sensor harness connector
Disconnect the PCM harness connector.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the O2 Return circuit from the O2 Sensor harness
connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
All
Yes
→ NOTE: Before continuing, check the PCM harness connector
terminals for corrosion, damage, or terminal push out. Repair as
necessary. Replace and program the Powertrain Control Module
in accorance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
No
→ Repair the open in the O2 Return circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
296
DRIVEABILITY - NGC
P0132-O2 SENSOR 1/1 VOLTAGE HIGH —
Continued