Chrysler Voyager. Manual — part 14

Symptom:

P0122-THROTTLE POSITION SENSOR VOLTAGE LOW

When Monitored and Set Condition:

P0122-THROTTLE POSITION SENSOR VOLTAGE LOW

When Monitored:

With the ignition on. Battery voltage greater than 10.4 volts.

Set Condition:

Throttle Position Sensor voltage at the PCM is less than 0.16 volt for 0.7

seconds.

POSSIBLE CAUSES

TP SENSOR VOLTAGE BELOW 0.2

(F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND

(F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO (K900) SENSOR GROUND CIRCUIT

(F855) 5-VOLT SUPPLY CIRCUIT OPEN

TP SENSOR INTERNAL FAILURE

(K22) TP SENSOR SIGNAL CIRCUIT SHORTED TO GROUND

(K22) TP SENSOR SIGNAL CIRCUIT SHORTED TO (K900) SENSOR GROUND CIRCUIT

TCM INTERNALLY SHORTED TP SIGNAL CIRCUIT

PCM

TEST

ACTION

APPLICABILITY

1

Turn the ignition on.
With the DRBIII

t, read the TP Sensor voltage.

Is the voltage below 0.2 of a volt?

All

Yes

→ Go To 2

No

→ Refer to the INTERMITTENT CONDITION symptom in the

Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

2

Turn the ignition off.
Disconnect the MAP Sensor harness connector.
Turn the ignition on.
Measure the voltage of the (F855) 5-volt Supply circuit in the MAP Sensor harness
connector.
Is the voltage between 4.5 to 5.2 volts?

All

Yes

→ Go To 3

No

→ Go To 7

55

DRIVEABILITY - SBEC

TEST

ACTION

APPLICABILITY

3

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

t, monitor the TP Sensor voltage.

Turn the ignition on.
Is the voltage above 4.5 volts?

All

Yes

→ Replace the TP Sensor.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Go To 4

4

Turn the ignition off.
Disconnect the TP Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance of the (K22) TP Sensor Signal circuit in the TP Sensor
harness connector to ground.
Is the resistance below 100 ohms?

All

Yes

→ Repair the short to ground in the (K22) TP Sensor Signal circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Go To 5

5

Turn the ignition off.
Disconnect the TP Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance between the (K22) TP Sensor Signal circuit and the (K900)
Sensor Ground circuit in the TP Sensor harness connector.
Is the resistance below 100 ohms?

All

Yes

→ Repair the short to (K900) Sensor Ground circuit in the (K22)

Throttle Position Sensor Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Go To 6

6

Turn the ignition off.
Disconnect the TP Sensor harness connector.
Disconnect the TCM harness connector.
With the DRBIII

t, monitor the TP Sensor voltage.

Turn the ignition on.
Is the voltage above 4.5 volts?

All

Yes

→ Replace the Transmission Control Module.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Go To 7

7

Turn the ignition off.
Disconnect the TP Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance of the (F855) 5-volt Supply circuit in the TP Sensor harness
connector to ground.
Is the resistance below 100 ohms?

All

Yes

→ Repair the short to ground in the (F855) 5-volt Supply circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Go To 8

56

DRIVEABILITY - SBEC

P0122-THROTTLE POSITION SENSOR VOLTAGE LOW —

Continued

TEST

ACTION

APPLICABILITY

8

Turn the ignition off.
Disconnect the TP Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance of the (F855) 5-volt Supply circuit in the TP Sensor harness
connector to (K900) Sensor Ground circuit.
Is the resistance below 100 ohms?

All

Yes

→ Repair the short to (K900) Sensor Ground circuit in the (F855)

5-volt Supply circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Go To 9

9

Turn the ignition off.
Disconnect the TP Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance of the (F855) 5-volt Supply circuit between the TP Sensor
harness connector and the PCM harness connector.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 10

No

→ Repair the open in the (F855) 5-volt Supply circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

10

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.

57

DRIVEABILITY - SBEC

P0122-THROTTLE POSITION SENSOR VOLTAGE LOW —

Continued

Symptom:

P0123-THROTTLE POSITION SENSOR VOLTAGE HIGH

When Monitored and Set Condition:

P0123-THROTTLE POSITION SENSOR VOLTAGE HIGH

When Monitored:

With the ignition on. Battery voltage greater than 10.4 volts.

Set Condition:

Throttle Position Sensor voltage at the PCM is greater than 4.5 volts for

0.7 seconds.

POSSIBLE CAUSES

THROTTLE POSITION SENSOR SWEEP

INTERMITTENT CONDITION

(K22) TP SENSOR SIGNAL CIRCUIT SHORTED TO (F855) 5-VOLT SUPPLY CIRCUIT

(K22) TP SENSOR SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE

TP SENSOR INTERNAL FAILURE

(K22) TP SENSOR SIGNAL CIRCUIT OPEN

(K900) SENSOR GROUND CIRCUIT OPEN

PCM

TEST

ACTION

APPLICABILITY

1

NOTE: Ensure the throttle is fully closed and free from binding or carbon
build up.
Start the engine.
With the DRBIII

t, read the TP Sensor voltage.

Is the voltage above 4.5 volts?

All

Yes

→ Go To 2

No

→ Go To 8

2

Turn the ignition off.
Disconnect the TP Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance between the (K22) TP Sensor Signal circuit and the (F855)
5-volt Supply circuit in the TP Sensor harness connector.
Is the resistance below 100 ohms?

All

Yes

→ Repair the short to the (F855) 5-volt Supply circuit in the (K22)

Throttle Position Sensor Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Go To 3

58

DRIVEABILITY - SBEC