Jeep XJ. Manual — part 828
TEST
ACTION
APPLICABILITY
6
Turn the ignition off.
Disconnect the O2 Sensor 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?
All
Yes
→
Repair the O2 Sensor Signal circuit for a short to the Heater
ground circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
7
If there are no possible causes remaining, view repair.
All
Repair
Replace the Powertrain Control Module.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
8
WARNING: KEEP CLEAR OF THE ENGINE’S MOVING PARTS.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, monitor the DRB
parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Review the DRB Freeze Frame information. If possible, try to duplicate the
conditions under which the DTC was set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?
All
Yes
→
Repair as necessary
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
Test Complete.
73
DRIVEABILITY - GAS
P0131-1/1 O2 SENSOR SHORTED TO GROUND —
Continued
Symptom List:
P0132-1/1 O2 SENSOR SHORTED TO VOLTAGE
P0138-1/2 O2 SENSOR SHORTED TO VOLTAGE
P0152-2/1 O2 SENSOR SHORTED TO VOLTAGE
P0158-2/2 O2 SENSOR SHORTED TO VOLTAGE
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P0132-1/1 O2 SENSOR SHORTED
TO VOLTAGE.
When Monitored and Set Condition:
P0132-1/1 O2 SENSOR SHORTED TO VOLTAGE
When Monitored:
With battery voltage greater than 10.4 volts, engine running for more
than 4 minutes and coolant temperature above 180°F.
Set Condition:
The oxygen sensor voltage is above 1.5 volts.
P0138-1/2 O2 SENSOR SHORTED TO VOLTAGE
When Monitored:
With battery voltage greater than 10.4 volts, engine running for more
than 4 minutes and coolant temperature above 180°F.
Set Condition:
The oxygen sensor voltage is above 1.5 volts.
P0152-2/1 O2 SENSOR SHORTED TO VOLTAGE
When Monitored:
With battery voltage greater than 10.4 volts, engine running for more
than 4 minutes and coolant temperature above 180°F.
Set Condition:
The oxygen sensor voltage is above 1.5 volts.
P0158-2/2 O2 SENSOR SHORTED TO VOLTAGE
When Monitored:
With battery voltage greater than 10.4 volts, engine running for more
than 4 minutes and coolant temperature above 180°F.
Set Condition:
The oxygen sensor voltage is above 1.5 volts.
POSSIBLE CAUSES
INTERMITTENT CONDITION
O2 SENSOR OPERATION
O2 SENSOR SIGNAL SHORTED TO VOLTAGE
O2 SENSOR SIGNAL CIRCUIT SHORTED TO O2 HEATER RELAY OUTPUT CIRCUIT
O2 SENSOR SIGNAL OPEN
O2 SENSOR GROUND CIRCUIT OPEN
PCM
74
DRIVEABILITY - GAS
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, read DTC’s.
Is the Good Trip Counter for this DTC displayed and equal to zero?
All
Yes
→
No
→
2
Start the engine.
Allow the engine to idle.
With the DRBIII
t, read the O2 Sensor voltage.
Is the voltage above 1.2 volts?
All
Yes
→
No
→
3
WARNING: KEEP CLEAR OF THE ENGINE’S MOVING PARTS.
Start the engine.
Disconnect the O2 Sensor harness connector.
With the DRBIII
t, monitor the O2 Sensor voltage.
Is the O2 Sensor voltage below 1.2 volts?
All
Yes
→
Replace the O2 Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
4
Turn the ignition off.
Disconnect the O2 Sensor harness connector
Turn the ignition on.
Measure the voltage of the O2 Sensor Signal circuit in the O2 Sensor harness
connector.
Is the voltage above 1.2 volts?
All
Yes
→
Repair the O2 Sensor Signal for a shorted to voltage.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
5
Turn the ignition off.
Disconnect the O2 Sensor harness connector.
Measure the resistance between the O2 Sensor Signal circuit and the O2 Heater
Relay Output circuit in the O2 Sensor harness connector.
Is the resistance below 100 ohms?
All
Yes
→
Repair the O2 Sensor Signal circuit for a short to the O2 Heater
Relay Output circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
6
Turn the ignition off.
Disconnect the O2 Sensor harness connector
Disconnect the PCM harness connector.
Measure the resistance of the O2 Sensor Signal circuit from the O2 Sensor harness
connector and the PCM harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→
No
→
Repair the O2 Sensor Signal for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
75
DRIVEABILITY - GAS
P0132-1/1 O2 SENSOR SHORTED TO VOLTAGE —
Continued
TEST
ACTION
APPLICABILITY
7
Turn the ignition off.
Disconnect the O2 Sensor harness connector
Disconnect the PCM harness connector.
Measure the resistance of the O2 Sensor ground circuit from the O2 Sensor harness
connector and the PCM harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→
No
→
Repair the O2 Sensor ground circuit for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
8
If there are no possible causes remaining, view repair.
All
Repair
Replace the Powertrain Control Module.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
9
WARNING: KEEP CLEAR OF THE ENGINE’S MOVING PARTS.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, monitor the DRBIII
t
parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Review the DRBIII
t Freeze Frame information. If possible, try to duplicate the
conditions under which the DTC was set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?
All
Yes
→
Repair as necessary
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
Test Complete.
76
DRIVEABILITY - GAS
P0132-1/1 O2 SENSOR SHORTED TO VOLTAGE —
Continued
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