Chrysler Voyager. Manual — part 33

TEST

ACTION

APPLICABILITY

3

Turn the ignition off.
Disconnect the TCM harness connector.
Turn the ignition on.
Connect a jumper wire to the (N7) VSS Signal circuit in the TCM harness connector.
With the DRBIII

t, monitor the Vehicle Speed Signal display.

Tap the other end of the jumper wire rapidly to ground.
Does the Vehicle Speed Signal display the MPH/kmh above 0?

All

Yes

→ Go To 4

No

→ Replace the Transmission Comtrol Module in accordance with the

Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

4

Turn the ignition off.
Disconnect the PCM harness connector.
Disconnect the TCM harness connector.
Measure the resistance of the (N7) Vehicle Speed Sensor Signal circuit in the PCM
harness connector to ground.
Is the resistance below 100 ohms?

All

Yes

→ Repair the (N7) Vehicle Speed Sensor Signal circuit for a short to

ground.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Go To 5

5

Turn the ignition off.
Disconnect the PCM harness connector.
Disconnect the TCM harness connector.
Measure the resistance of the (N7) Vehicle Speed Sensor Signal circuit between the
PCM harness connector and the TCM harness connector.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 6

No

→ Repair the (N7) Vehicle Speed Sensor Signal circuit for an open.

Perform POWERTRAIN VERIFICATION TEST VER - 5

6

NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connector.
Pay particular attention to all Power and Ground circuits.
If there is 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.

131

DRIVEABILITY - SBEC

P0500-NO VEHICLE SPEED SIGNAL (4SP AUTO TRANS) —

Continued

Symptom:

P0508 - IAC MOTOR SENSE CIRCUIT LOW

When Monitored and Set Condition:

P0508 - IAC MOTOR SENSE CIRCUIT LOW

When Monitored:

Engine running. The batterty voltage greater than 10 volts.

Set Condition:

IAC Valve Sense current is less than 146.33 mA for 500 milli seconds.

POSSIBLE CAUSES

INTERMITTENT CONDITION

IAC MOTOR

IAC MOTOR DRIVER CIRCUIT SHORTED TO GROUND

IAC MOTOR SENSE CIRCUIT OPEN

IAC MOTOR SENSE CIRCUIT SHORTED TO GROUND

IAC MOTOR DRIVER CIRCUIT OPEN

PCM

TEST

ACTION

APPLICABILITY

1

NOTE: If the engine will not idle, maintain an engine speed between 800 and
1500 RPM.
Start the engine.
Allow the engine to idle.
With the DRBIII

t, read the IAC Current.

Is the IAC Current below 146 mA?

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 IAC Motor harness connector.
Remove the IAC Motor.
NOTE: Inspect the IAC air passages for restriction and damage to the IAC
valve.
Measure the resistance across the IAC Motor pin terminals (component).
Is the resistance 9.7 +/- 1.0 ohms?

All

Yes

→ Go To 3

No

→ Replace the IAC Motor.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

132

DRIVEABILITY - SBEC

TEST

ACTION

APPLICABILITY

3

Turn the ignition off.
Disconnect the IAC Motor harness connector.
Disconnect the Powertrain Control Module harness connectors.
Measure the resistance of the IAC Motor Sense circuit from the PCM harness
connector to the IAC Motor harness connector.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 4

No

→ Repair the open in the IAC Sense circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

4

Turn the ignition off.
Disconnect the IAC Motor harness connector.
Disconnect the PCM harness connectors.
Measure the resistance of the IAC Motor Sense in the IAC Motor harness connector
to ground.
Is the resistance below 5.0 ohms?

All

Yes

→ Repair the short to ground in the IAC Motor Sense circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Go To 5

5

Turn the ignition off.
Disconnect the IAC Motor harness connector.
Disconnect the Powertrain Control Module harness connectors.
Measure the resistance of the IAC Motor Driver circuit from the PCM harness
connector to the IAC Motor harness connector.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 6

No

→ Repair the open in the IAC Motor Driver circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

6

Turn the ignition off.
Disconnect the IAC Motor harness connector.
Disconnect the PCM harness connectors.
Measure the resistance of the IAC Motor Driver circuit in the IAC Motor harness
connector to ground.
Is the resistance below 100 ohms?

All

Yes

→ Repair the short to ground in the IAC Motor Driver circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Go To 7

7

NOTE: Before continuing, check the PCM harness connector 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.

133

DRIVEABILITY - SBEC

P0508 - IAC MOTOR SENSE CIRCUIT LOW —

Continued

Symptom:

P0509 - IAC MOTOR SENSE CIRCUIT HIGH

When Monitored and Set Condition:

P0509 - IAC MOTOR SENSE CIRCUIT HIGH

When Monitored:

Engine running. The batterty voltage greater than 10 volts.

Set Condition:

IAC Valve Sense current is greater than 999.9 mA for 500 milli seconds.

POSSIBLE CAUSES

INTERMITTENT CONDITION

IAC MOTOR

IAC MOTOR SENSE CIRCUIT SHORTED TO VOLTAGE

IAC MOTOR DRIVER CIRCUIT SHORTED TO VOLTAGE

IAC MOTOR SENSE CIRCUIT SHORTED TO IAC MOTOR DRIVER CIRCUIT

PCM

TEST

ACTION

APPLICABILITY

1

NOTE: If the engine will not idle, maintain an engine speed between 800 and
1500 RPM.
Start the engine.
Allow the engine to idle.
With the DRBIII

t, read the IAC Current.

Is the IAC Current above 999 mA?

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 IAC Motor harness connector.
With the DRBIII

t, monitor the IAC Current.

Turn the ignition on.
Does the DRBIII

t display IAC Current at 0mA?

All

Yes

→ Replace the IAC Motor.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Go To 3

134

DRIVEABILITY - SBEC