Chrysler RG Voyager. Manual — part 425

TEST

ACTION

APPLICABILITY

19

Turn the ignition off.
Disconnect the APP Sensor harness connector.
Disconnect the ECM harness connectors.
Remove the ECM/PCM Relay from the IPM.
Connect a jumper wire between cavity 30 and cavity 87 of the ECM/PCM Relay
connector.
Turn the ignition on.
Measure the voltage of the 5-volt Supply circuit in the ECM harness connector.
Is the voltage above 1.0 volt?

All

Yes

→ Repair the 5-volt Supply circuit for a short to voltage.

Perform ROAD TEST VERIFICATION - VER-2.

No

→ Replace and program the Engine Control Module in accordance

with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.

20

Turn the ignition off.
Disconnect the APP Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance of the Low Idle Position Switch Sense circuit.
Is the resistance below 10.0 ohms?

All

Yes

→ Go To 21

No

→ Repair the Low Idle Position Switch Sense circuit for an open.

Perform ROAD TEST VERIFICATION - VER-2.

21

Turn the ignition off.
Disconnect the APP Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance between ground and the Low Idle Position Switch Sense
circuit.
Is the resistance above 1000 ohms?

All

Yes

→ Go To 22

No

→ Repair the Low Idle Position Switch Sense circuit for a short to

ground.
Perform ROAD TEST VERIFICATION - VER-2.

22

Turn the ignition off.
Disconnect the APP Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance between the Low Idle Position Switch Sense circuit and the
Sensor Ground circuit at the APP Sensor harness connector.
Is the resistance above 1000 ohms?

All

Yes

→ Go To 23

No

→ Repair the Low Idle Position Switch Sense circuit for a short to

the Sensor Ground circuit.
Perform ROAD TEST VERIFICATION - VER-2.

203

DRIVEABILITY - DIESEL

P2120-ACC PEDAL POSITION SENSOR 1 CKT PLAUSIBILITY —

Continued

TEST

ACTION

APPLICABILITY

23

Turn the ignition off.
Disconnect the APP Sensor harness connector.
Disconnect the ECM harness connectors.
Remove the ECM/PCM Relay from the IPM.
Connect a jumper wire between cavity 30 and cavity 87 of the ECM/PCM Relay
connector.
Turn the ignition on.
Measure the voltage of the Low Idle Position Switch Sense circuit.
Is the voltage above 1.0 volt?

All

Yes

→ Repair the Low Idle Position Switch Sense circuit for a short to

voltage.
Perform ROAD TEST VERIFICATION - VER-2.

No

→ Go To 24

24

Turn the ignition off.
Disconnect the APP Sensor harness connector.
Disconnect the ECM harness connectors.
Remove the ECM/PCM Relay from the IPM.
Connect a jumper wire between cavity 30 and cavity 87 of the ECM/PCM Relay
connector.
Turn the ignition on.
Measure the voltage of the Sensor Ground circuit.
Is the voltage above 1.0 volt?

All

Yes

→ Repair the Sensor Ground circuit for a short to voltage.

Perform ROAD TEST VERIFICATION - VER-2.

No

→ Go To 25

25

Turn the ignition off.
Disconnect the APP Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance of the Sensor Ground circuit between the APP Sensor and the
ECM.
Is the resistance below 10.0 ohms?

All

Yes

→ Replace and program the Engine Control Module in accordance

with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.

No

→ Repair the Sensor Ground circuit for an open.

Perform ROAD TEST VERIFICATION - VER-2.

204

DRIVEABILITY - DIESEL

P2120-ACC PEDAL POSITION SENSOR 1 CKT PLAUSIBILITY —

Continued

Symptom:

*CHECKING FUEL PRESSURE SOLENOID CIRCUITS

POSSIBLE CAUSES

FUEL PRESSURE SOLENOID RESISTANCE

OPEN CIRCUITS

TEST

ACTION

APPLICABILITY

1

Turn the ignition off.
Disconnect the Fuel Pressure Solenoid harness connector.
Disconnect the ECM harness connectors.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires. Repair as necessary.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals. Repair as necessary.
Measure the resistance of both Fuel Pressure Solenoid circuits between the ECM
harness connector and the Fuel Pressure Solenoid harness connector.
Is the resistance below 10.0 ohms for both measurements?

All

Yes

→ Go To 2

No

→ Repair open circuit(s) as necessary.

Perform ROAD TEST VERIFICATION - VER-2.

2

Turn the ignition off.
Disconnect the Fuel Pressure Solenoid harness connector.
Measure the resistance of the Fuel Pressure Solenoid.
Is the resistance between 3.5 and 5.5 ohms?

All

Yes

→ Test Complete.

No

→ Replace the Fuel Pressure Solenoid.

Perform ROAD TEST VERIFICATION - VER-2.

205

DRIVEABILITY - DIESEL

Symptom:

*CHECKING THE A/C CLUTCH OPERATION

POSSIBLE CAUSES

CHECK THE A/C CLUTCH OPERATION

FUSED B+ CIRCUIT OPEN

A/C CLUTCH RELAY

A/C CLUTCH RELAY OUTPUT CIRCUIT SHORTED TO VOLTAGE

A/C CLUTCH RELAY OUTPUT CIRCUIT SHORTED TO GROUND

A/C CLUTCH RELAY OUTPUT CIRCUIT OPEN

A/C CLUTCH GROUND CIRCUIT OPEN

A/C CLUTCH

TEST

ACTION

APPLICABILITY

1

NOTE: Ensure that the refrigerant system is properly charged. Refer to the
appropriate Service Information.
Turn the ignition on.
With the DRBIII

t, actuate the A/C Clutch Relay.

Is the A/C Clutch actuating?

All

Yes

→ The A/C Clutch System is operating properly at this time.

Perform ROAD TEST VERIFICATION - VER-2.

No

→ Go To 2

2

NOTE: If the A/C Clutch fuse is open, refer to the system schematics for all
circuits that are powered by the A/C Clutch fuse to determine the cause of
the open fuse.
Turn the ignition off.
Remove the A/C Clutch Relay from the IPM.
Using a 12-volt test light connected to ground, probe the Fused B+ circuit in the IPM.
Does the test light illuminate brightly?

All

Yes

→ Go To 3

No

→ Repair the Fused B+ circuit. Inspect fuse and replace as neces-

sary.
Perform ROAD TEST VERIFICATION - VER-2.

3

Turn the ignition off.
Install a substitute relay in place of the A/C Clutch Relay.
Turn the ignition on.
With the DRBIII

t, actuate the A/C Clutch Relay.

Does the A/C Clutch Relay cycle on and off?

All

Yes

→ Replace the A/C Clutch Relay.

Perform ROAD TEST VERIFICATION - VER-2.

No

→ Go To 4

206

DRIVEABILITY - DIESEL