Chrysler 300M 2002 Service Manual page 2522

P0131-O2 SENSOR 1/1 VOLTAGE LOW —
TEST
5 Turn the ignition off.
Disconnect the O2 Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance between ground and the O2 Sensor Signal circuit in the O2
Sensor harness connector.
Is the resistance below 100 ohms?
Yes → Repair the short to ground in the O2 Sensor Signal circuit.
→ Go To 6
No
6 Turn the ignition off.
Disconnect the O2 Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance between the O2 Sensor Signal circuit and the Sensor Return
circuit in the O2 Sensor harness connector.
Is the resistance below 100 ohms?
Yes → Repair the short to the Sensor Return circuit in the O2 Sensor
→ Go To 7
No
7 Turn the ignition off.
Disconnect the O2 Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance between the O2 Sensor Signal circuit and the Heater ground
circuit in the O2 Sensor harness connector.
Is the resistance below 100 ohms?
Yes → Repair the short to the Heater ground circuit in the O2 Sensor
→ Go To 8
No
8 NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
If there are no possible causes remaining, view repair.
Repair
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
DRIVEABILITY - NGC
Continued
93
APPLICABILITY
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All
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All