TEST ACTION APPLICABILITY
6 Turn the ignition off.
Disconnect the O2 Sensor harness connector.
Disconnect the PCM harness connector.
Ignition on, engine not running.
Measure the voltage on the O2 Heater Control circuit at the O2 Sensor harness
connector.
Does the voltmeter indicate any voltage present?
All
Yes → Repair the short to voltage in the O2 Heater Control circuit.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
No → Go To 7
7 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 Heater Control 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 accordance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
No → Repair the open in the O2 Heater Control circuit.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
39
DRIVEABILITY - NGC
P0032-O2 SENSOR 1/1 HEATER CIRCUIT HIGH — Continued
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