Dodge Dakota (R1). Manual — part 160
TEST
ACTION
APPLICABILITY
4
Turn the ignition off.
Disconnect the Fuel Level Sensor harness connector.
Disconnect the PCM harness connectors.
Measure the resistance between Sensor Ground and the Fuel Level Sensor Signal
circuit.
Is the resistance below 1000.0 ohms?
All
Yes
→
Repair the Fuel Level Sensor Signal circuit for a short to Sensor
Ground.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
5
Turn the ignition off.
Completely drain the fuel tank. Refer to Service Information for proper procedure.
NOTE: It is necessary to know the fuel tank capacity for this test.
Fill the fuel tank to 1/4 of its capacity then turn the ignition on and note the
instrument cluster fuel gauge reading.
Turn the ignition off.
Fill the fuel tank to 3/4 of its capacity then turn the ignition on and note the
instrument cluster fuel gauge reading.
Does the Fuel Gauge read the fuel tank levels accurately?
All
Yes
→
Test Complete.
No
→
Replace the Fuel Level Sensor.
Perform ROAD TEST VERIFICATION - VER-2.
175
DRIVEABILITY - DIESEL
*CHECKING THE FUEL LEVEL GAUGE OPERATION —
Continued
Symptom:
*CHECKING THE FUEL TEMPERATURE SENSOR CALIBRATION
POSSIBLE CAUSES
FUEL TEMPERATURE SENSOR - COLD
FUEL TEMPERATURE SENSOR - HOT
TEST
ACTION
APPLICABILITY
1
Disconnect the Fuel Heater harness connector.
With the DRB, monitor the engine coolant temperature and fuel temperature.
Start and idle the engine until engine temperature reaches 70°C (160°F).
NOTE: If the engine temperature is above 70°C (160°F), allow the engine to
cool down to 70°C (160°F).
Is the fuel temperature between 20°C (70°F) and 50°C (120°F)?
All
Yes
→
No
→
Replace the Fuel Injection Pump Assembly in accordance with the
Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
2
Disconnect the Fuel Heater harness connector.
With the DRB, monitor the engine coolant temperature and fuel temperature.
Start and idle the engine until engine temperature reaches 70°C (160°F).
NOTE: If the engine temperature is above 70°C (160°F), allow the engine to
cool down to 70°C (160°F).
Start the engine and allow engine to reach operating temperature of 90°C (195°F).
Does the Fuel Temperature increase smoothly to 40-60°C (100-140°F)?
All
Yes
→
Test Complete.
No
→
Replace the Fuel Injection Pump Assembly in accordance with the
Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
176
DRIVEABILITY - DIESEL
Symptom:
*CHECKING THE GLOW PLUG OPERATION
POSSIBLE CAUSES
CHECKING THE GLOW PLUGS
FUSED B+ CIRCUIT OPEN
GLOW PLUG RELAY
GLOW PLUG RELAY OUTPUT CIRCUIT OPEN
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
Disconnect all four Glow Plug connectors.
Turn the ignition on.
With the DRB, actuate Glow Relay #1.
Using a 12-volt test light connected to ground, probe each Glow Plug connector.
Does the test light cycle on and off for each Glow Plug connector during actuator test?
All
Yes
→
No
→
2
Refer to the Service Information and perform the Glow Plug Test.
Are all the Glow Plugs operating properly?
All
Yes
→
Test Complete.
No
→
Replace the Glow Plug(s) as necessary in accordance with the
Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
3
Remove the Glow Plug Relay from the PDC.
Turn the ignition on.
Using a 12-volt test light connected to ground, check the Fused B+ circuit in the Glow
Plug Relay connector in the PDC.
Is the test light on?
All
Yes
→
No
→
Repair the Fused B+ circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
4
Turn the ignition off.
Disconnect all the Glow Plug connectors.
Remove the Glow Plug Relay from the PDC.
Connect a jumper wire across the Glow Plug Relay connector cavities 30 and 87.
Using a 12-volt test light connected to ground, check each Glow Plug Relay Output
circuit at each Glow Plug connector.
Is the test light on at each of the Glow Plug connectors?
All
Yes
→
Replace the Glow Plug Relay.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
Repair the Glow Plug Relay Output circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
177
DRIVEABILITY - DIESEL
Symptom:
*CHECKING THE LOW COOLANT LAMP OPERATION
POSSIBLE CAUSES
CHECK THE LOW COOLANT SWITCH
POWERTRAIN CONTROL MODULE - CONTROL OPEN
CHECK FOR COMMUNICATION DTCS
LOW COOLANT SWITCH SIGNAL CIRCUIT OPEN
LOW COOLANT SWITCH SIGNAL CIRCUIT SHORTED TO GROUND
LOW COOLANT SWITCH GROUND CIRCUIT OPEN
LOW COOLANT SWITCH - OPEN
LOW COOLANT SWITCH SIGNAL CIRCUIT SHORTED TO SWITCH GROUND
LOW COOLANT SWITCH - INTERNAL SHORT
POWERTRAIN CONTROL MODULE - SIGNAL OPEN
LOW COOLANT LAMP BULB
POWERTRAIN CONTROL MODULE - SIGNAL SHORT TO GROUND
INSTRUMENT CLUSTER
TEST
ACTION
APPLICABILITY
1
NOTE: Ensure the engine coolant is at the proper level before continuing.
Turn the ignition on and observe the Low Coolant Lamp.
Select the outcome of this operation.
All
Lamp on for 2 seconds, then off
Lamp on continuously
Lamp inoperative
2
Turn the ignition off.
Remove the coolant from the coolant reservoir.
Turn the ignition on.
Did the Low Coolant Lamp illuminate and stay on?
All
Yes
→
The Low Coolant Lamp System is working properly.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
178
DRIVEABILITY - DIESEL
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