Chrysler Town, Dodge Caravan. Manual — part 564
TEST
ACTION
APPLICABILITY
2
WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
Start the engine.
Disconnect the O2 Sensor harness connector.
With the DRBIII
t, monitor the O2 Sensor voltage.
Is the O2 Sensor voltage above 0.08?
All
Yes
→ Replace the O2 Sensor
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→ Go To 3
3
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?
All
Yes
→ Repair the O2 Sensor Signal circuit for a short to ground.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→ Go To 4
4
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 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 Sensor
ground circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→ Go To 5
5
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
control/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
control/ground circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→ Go To 6
6
NOTE: Before Continuing: Disconnect the PCM harness connector and
check the related wiring terminals for corrosion, damage or terminal push
out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay
particular attention to all Power and Ground circuits.
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
64
DRIVEABILITY - SBEC
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
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:
Engine running for 119 seconds. Battery voltage greater than 10 volts.
Coolant temperature above 80°C (176°F).
Set Condition:
The Oxygen Sensor voltage is above 1.21 volts for 2.8 seconds. One trip
fault.
P0138-1/2 O2 SENSOR SHORTED TO VOLTAGE
When Monitored:
The engine running for 119 seconds. Battery voltage greater than 10.4
volts. Coolant temperature above 80°C (176°F).
Set Condition:
The Oxygen Sensor voltage is above 1.21 volts for 2.8 seconds. Two trip
fault.
POSSIBLE CAUSES
O2 SENSOR BELOW 1.2 VOLTS
O2 SENSOR OPERATION
O2 SENSOR SIGNAL SHORTED TO VOLTAGE
O2 SENSOR SIGNAL OPEN
O2 SENSOR GROUND CIRCUIT OPEN
PCM
TEST
ACTION
APPLICABILITY
1
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
→ Go To 2
No
→ Refer to the INTERMITTENT CONDITION symptom in the
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
65
DRIVEABILITY - SBEC
TEST
ACTION
APPLICABILITY
2
WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
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
→ Go To 3
3
Turn the ignition off.
Disconnect the O2 Sensor harness connector
WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
Start the engine and allow the engine to idle.
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 circuit for a shorted to voltage.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→ Go To 4
4
Turn the ignition off.
Disconnect the O2 Sensor harness connector
Disconnect the PCM harness connector.
Measure the resistance of the O2 Sensor Signal circuit between the O2 Sensor
harness connector and the PCM harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 5
No
→ Repair the O2 Sensor Signal for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
5
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
→ Go To 6
No
→ Repair the O2 Sensor ground cirucit for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
66
DRIVEABILITY - SBEC
P0132-1/1 O2 SENSOR SHORTED TO VOLTAGE —
Continued
TEST
ACTION
APPLICABILITY
6
NOTE: Before Continuing: Disconnect the PCM harness connector and
check the related wiring terminals for corrosion, damage or terminal push
out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay
particular attention to all Power and Ground circuits.
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
67
DRIVEABILITY - SBEC
P0132-1/1 O2 SENSOR SHORTED TO VOLTAGE —
Continued
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