Chrysler RG Voyager. Manual — part 429

TEST

ACTION

APPLICABILITY

24

Turn the ignition off.
Disconnect the Radiator Fan Relay No. 3 harness connector.
Disconnect the Radiator Fan No. 1 harness connector.
Using a 12-volt test light connected to 12-volts, check the Radiator Fan No. 1 Control
circuit.
Did the test light illuminate brightly?

All

Yes

→ Repair the Radiator Fan No. 1 Control circuit for a short to

ground.
Perform ROAD TEST VERIFICATION - VER-2.

No

→ Go To 25

25

If there are no possible causes remaining, view repair.

All

Repair

Replace the Radiator Fan No.2.
Perform ROAD TEST VERIFICATION - VER-2.

26

Turn the ignition off.
Disconnect the Radiator Fan Relay No. 3 harness connector.
Disconnect the Radiator Fan No. 1 harness connector.
Measure the voltage on the Radiator Fan No. 1 Control circuit.
Is the voltage above 1.0 volt?

All

Yes

→ Repair the Radiator Fan No. 1 Control circuit for a short to

voltage.
Perform ROAD TEST VERIFICATION - VER-2.

No

→ Go To 27

27

If there are no possible causes remaining, view repair.

All

Repair

Replace Radiator Fan No.1.
Perform ROAD TEST VERIFICATION - VER-2.

219

DRIVEABILITY - DIESEL

*CHECKING THE ELECTRIC RADIATOR FAN OPERATION —

Continued

Symptom:

*CHECKING THE ENGINE COOLANT TEMPERATURE SENSOR
CALIBRATION

POSSIBLE CAUSES

ECT SENSOR - COLD

ECT SENSOR - HOT

TEST

ACTION

APPLICABILITY

1

NOTE: The thermostat must be operating correctly for this test to be valid.
With the DRB, read and note the engine coolant temperature.
Using a temperature probe, measure the engine block temperature near the ECT
Sensor.
NOTE: The engine temperature should be below 50°C (120°F).
Are the readings within 7°C (13°F) of each other?

All

Yes

→ Go To 2

No

→ Replace the Engine Coolant Temperature Sensor.

Perform ROAD TEST VERIFICATION - VER-2.

2

NOTE: The thermostat must be operating correctly for this test to be valid.
Start the engine and bring the engine to operating temperature (thermostat open).
Turn the engine off and wait 10 minutes to allow the engine temperature to stabilize.
Using a temperature probe, measure the engine block temperature near the ECT
Sensor.
Using the DRB, select Engine, then Sensors and read the engine coolant tempera-
ture.
Are the readings within 7°C (13°F) of each other?

All

Yes

→ Test Complete.

No

→ Replace the Engine Coolant Temperature Sensor.

Perform ROAD TEST VERIFICATION - VER-2.

220

DRIVEABILITY - DIESEL

Symptom:

*CHECKING THE ENGINE MECHANICAL SYSTEMS

POSSIBLE CAUSES

CHECKING ENGINE MECHANICAL SYSTEMS

TEST

ACTION

APPLICABILITY

1

NOTE: The following items should be checked as a possible cause of a
Driveability or No-Start problem.
WARNING: Do not attempt to remove or separate high pressure fuel line.
Attempting to do so could result in severe bodily injury or death.
Engine Valve Timing - must be within specification
Engine Compression - must be within specifications
Camshaft Lobes - check for abnormal wear
Camshaft Position Sensor - check the camshaft position sensor tooth for debris and
deterioration
Crankshaft Position Sensor - check the crankshaft tone wheel for debris and
deterioration
Engine Exhaust System - must be free of any restriction
Engine Drive Sprocket - must be properly positioned
Vacuum System - must operate properly and be free of any vacuum leaks
Fuel - must have adequate supply and must be free of contamination (ie. debris,
water and gasoline)
Fuel Injectors - must not be plugged or restricted
Fuel Lift Pump - must operate properly (where applicable)
Fuel Injection Pump - must be producing the correct output volume and pressure
Inspect the Fuel Lines, Fuel Filter and Fuel Pressure Relief Valve for signs of
restriction and leaks
NOTE: Check for any Technical Service Bulletins that may relate to the
problem.
Are there any problems evident?

All

Yes

→ Repair as necessary.

Perform ROAD TEST VERIFICATION - VER-2.

No

→ Test Complete.

221

DRIVEABILITY - DIESEL

Symptom:

*CHECKING THE FUEL PRESSURE SENSOR CIRCUITS

POSSIBLE CAUSES

OPEN CIRCUITS

TEST

ACTION

APPLICABILITY

1

Turn the ignition off.
Disconnect the Fuel Pressure Sensor 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 each of the three Fuel Pressure Sensor circuits between the
ECM harness connector and the Fuel Pressure Sensor harness connector.
Is the resistance below 10.0 ohms for each measurement?

All

Yes

→ Test Complete.

No

→ Repair open circuit(s) as necessary.

Perform ROAD TEST VERIFICATION - VER-2.

222

DRIVEABILITY - DIESEL