Chrysler 300M 2002 Service Manual page 2525

DRIVEABILITY - NGC
P0132-O2 SENSOR 1/1 VOLTAGE HIGH —
O2 SENSOR SIGNAL OPEN
PCM RETURN CIRCUIT
PCM SIGNAL CIRCUIT
TEST
1 Start the engine.
Allow the engine to reach normal operating temperature.
With the DRBIII , read the O2 Sensor voltage.
Is the voltage above 3.99 volts?
Yes → Go To 2
→ Go To 8
No
2 Turn the ignition off.
Disconnect the O2 Sensor harness connector.
Ignition on, engine not running.
With the DRBIII , monitor the O2 Sensor voltage.
Is the O2 Sensor voltage below 4.8 volts?
Yes → Go To 3
→ Go To 5
No
3 Turn the ignition off.
Disconnect the O2 Sensor harness connector.
Ignition on, engine not running.
Measure the voltage on the O2 Sensor Return circuit in the O2 Sensor harness
connector.
Is the voltage at 2.5 volts?
Yes → Replace the O2 Sensor.
→ Go To 4
No
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 Sensor Return circuit from the O2 Sensor harness
connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
Yes → NOTE: Before continuing, check the PCM harness connector
→ Repair the open in the O2 Sensor return circuit.
No
POSSIBLE CAUSES
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 5.
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.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Continued
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APPLICABILITY
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All
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