Chrysler Voyager. Manual — part 18

TEST

ACTION

APPLICABILITY

2

Turn the ignition off.
Disconnect the O2 Sensor harness connector.
Turn the ignition on.
Connect a test light to battery voltage, probe the O2 Sensor Signal circuit in the O2
Sensor harness connector.
With the DRBIII

t, read the O2 Sensor voltage.

Is the voltage above 1.0 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
Disconnect the PCM harness connector.
Measure the resistance of the O2 Sensor ground circuit between the O2 Sensor
harness connector and the PCM harness connector.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 4

No

→ Repair the O2 Sensor ground circuit for an open.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

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

NOTE: Ensure the voltmeter leads meet the terminals in the connector and
that there is good terminal to wire connection.
NOTE: Ensure the voltmeter leads are connected for positive polarity
Perform a voltage drop test by back probing between the O2 Sensor ground circuit at
the O2 Sensor harness connector and PCM harness connector.
Start the engine.
Allow the engine to idle.
Is the voltage below 0.10 volt?

All

Yes

→ Go To 6

No

→ Repair the high resistance on the O2 Sensor ground circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

71

DRIVEABILITY - SBEC

P0134-1/1 O2 SENSOR STAYS AT CENTER —

Continued

TEST

ACTION

APPLICABILITY

6

NOTE: Ensure the voltmeter leads meet the terminals in the connector and
that there is good terminal to wire connection.
NOTE: Ensure the voltmeter leads are connected for positive polarity
Perform a voltage drop test by back probing between the O2 Sensor Signal circuit at
the O2 Sensor harness connector and PCM harness connector.
Start the engine.
Allow the engine to idle.
Is the voltage below 0.10 volt?

All

Yes

→ Go To 7

No

→ Repair the high resistance on the O2 Sensor Signal circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

7

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.

72

DRIVEABILITY - SBEC

P0134-1/1 O2 SENSOR STAYS AT CENTER —

Continued

Symptom:

P0135-1/1 O2 SENSOR HEATER FAILURE

When Monitored and Set Condition:

P0135-1/1 O2 SENSOR HEATER FAILURE

When Monitored:

During vehicle shutdown after vehicle had been driven greater than 10

MPH with throttle open for a minimum of 3 minutes. Battery voltage greater than 11.0
volts.

Set Condition:

O2 sensor voltage continues to rise (instead of fall) after the diagnostics

has turned the ASD relay back on. Two trip fault.

POSSIBLE CAUSES

O2 SENSOR HEATER OPERATION

O2 HEATER ELEMENT

O2 SENSOR HEATER CONTROL CIRCUIT OPEN

O2 SENSOR HEATER CONTROL CIRCUIT SHORTED TO GROUND

ASD RELAY OUTPUT CIRCUIT OPEN

PCM

TEST

ACTION

APPLICABILITY

1

Turn the ignition on.
With the DRBIII

t, read DTC’s.

Is the Good Trip display and equal to zero?

All

Yes

→ Go To 3

No

→ Go To 2

2

Turn the ignition off.
NOTE: Wait a minimum of 8 minutes to allow the O2 Sensor to cool down
before continuing the test. Allow the O2 Sensor voltage to stabilize between
0.4 to 0.6 volts.
Turn the ignition on.
With the DRBIII

t, actuate the O2 Heater Test.

With the DRBIII

t, monitor O2 Sensor voltage for at least 2 minutes.

Does the voltage stay between 0.4 and 0.6

All

Yes

→ Go To 3

No

→ Refer to the INTERMITTENT CONDITION symptom in the

Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

73

DRIVEABILITY - SBEC

TEST

ACTION

APPLICABILITY

3

NOTE: Allow the O2 sensor to cool down to room temperature.
Turn the ignition off.
Disconnect the O2 Sensor harness connector.
Measure the resistance across the O2 Sensor Heater element component side.
Is the resistance between 2.0 and 7.0 ohms?

All

Yes

→ Go To 4

No

→ Replace the O2 Sensor.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

4

Turn the ignition off.
Disconnect the O2 Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance of the O2 Sensor Heater Control 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 Heater Control circuit 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 Heater Control circuit in the O2 Sensor
harness connector to ground.
Is the resistance below 5.0 ohms?

All

Yes

→ Repair the O2 Sensor Heater Control circuit for a short to ground.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Go To 6

6

Turn the ignition off.
Disconnect the O2 Sensor harness connector.
With the DRBIII

t, actuate the O2 Heater Test.

Measure the voltage of the ASD Relay Output circuit in the O2 Sensor harness
connector.
Is the voltage above 11.0 volts?

All

Yes

→ Go To 7

No

→ Repair the ASD Relay Output circuit for an open.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

7

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.

74

DRIVEABILITY - SBEC

P0135-1/1 O2 SENSOR HEATER FAILURE —

Continued