Dodge Dakota (R1). Manual — part 159
Symptom:
*CHECKING THE FUEL HEATER OPERATION
POSSIBLE CAUSES
FUEL HEATER RELAY
FUEL HEATER RELAY OUTPUT CIRCUIT OPEN
FUEL HEATER RESISTANCE
FUSED B+ CIRCUIT OPEN
GROUND CIRCUIT OPEN
IGNITION SWITCH OUTPUT CIRCUIT OPEN
RELAY GROUND CIRCUIT OPEN
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
Disconnect the Fuel Heater harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, check the Fuel Heater Relay Output
circuit at the Fuel Heater harness connector.
Is the test light on?
All
Yes
→
No
→
2
Turn the ignition off.
Disconnect the Fuel Heater harness connector.
Turn the ignition on.
Using a 12-volt test light connected to 12-volts, check the Ground circuit at the Fuel
Heater harness connector.
Is the test light on?
All
Yes
→
No
→
Repair the Ground circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
3
Turn the ignition off.
Disconnect the Fuel Heater harness connector.
Turn the ignition on.
With the DRB, read the Fuel Temperature Sensor.
NOTE: The Fuel temperature must be below 4.5°C (40°F).
Measure the resistance of the Fuel Heater.
Is the resistance between 0.7 and 2.0 ohms?
All
Yes
→
Test Complete.
No
→
Replace the Fuel Heater.
Perform ROAD TEST VERIFICATION - VER-2.
171
DRIVEABILITY - DIESEL
TEST
ACTION
APPLICABILITY
4
Turn the ignition off.
Install a substitute relay in place of the Fuel Heater Relay.
Disconnect the Fuel Heater harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, check the Fuel Heater Relay Output
circuit.
Is the test light on?
All
Yes
→
Replace the initial Fuel Heater Relay.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
5
Turn the ignition off.
Remove the Fuel Heater Relay.
Using a 12-volt test light connected to ground, check the Fused B+ circuit.
Is the test light on?
All
Yes
→
No
→
Repair the Fused B+ circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
6
Turn the ignition off.
Remove the Fuel Heater Relay.
Turn the ignition on.
Using a 12-volt test light connected to ground, check the Ignition Switch Output
circuit.
Is the test light on?
All
Yes
→
No
→
Repair the Ignition Switch Output circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
7
Turn the ignition off.
Remove the Fuel Heater Relay.
Turn the ignition on.
Using a 12-volt test light connected to 12-volts, check the Ground circuit at the Fuel
Heater Relay connector.
Is the test light on?
All
Yes
→
Repair the Fuel Heater Relay Output circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
Repair the Ground circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
172
DRIVEABILITY - DIESEL
*CHECKING THE FUEL HEATER OPERATION —
Continued
Symptom:
*CHECKING THE FUEL INJECTION PUMP
POSSIBLE CAUSES
CHECKING THE FUEL INJECTION PUMP
TEST
ACTION
APPLICABILITY
1
NOTE: This test should be performed before replacing the ECM during fault
code diagnostics.
NOTE: This test checks for shorted circuits internal to the Fuel Injection
Pump assembly.
Turn the ignition off.
Disconnect the Fuel Injection Pump 10-way harness connector.
NOTE: The following resistance measurements are performed on the Fuel
Injection Pump 10-way harness connector (pump side). Resistance on these
measurements should be greater than 100.0 ohms each.
Measure the resistance between cavity 1 and cavities 4, 5, 6, 7, 8, 9, 10 and case
ground.
Measure the resistance between cavity 4 and cavities 5, 6, 8, 9, 10 and case ground.
Measure the resistance between cavity 5 and cavities 6, 7, 8 and case ground.
Measure the resistance between cavity 6 and cavities 7, 8, 9 and 10.
Measure the resistance between cavity 7 and cavities 8, 9, 10 and case ground.
Is the resistance below 100.0 ohms for any of the measurements?
All
Yes
→
Replace the Fuel Injection Pump Assembly in accordance with the
Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
Test Complete.
173
DRIVEABILITY - DIESEL
Symptom:
*CHECKING THE FUEL LEVEL GAUGE OPERATION
POSSIBLE CAUSES
FUEL LEVEL SENSOR
FUEL LEVEL SENSOR SIGNAL CIRCUIT OPEN
FUEL LEVEL SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
FUEL LEVEL SENSOR SIGNAL CIRCUIT SHORTED TO SENSOR GROUND
INSTRUMENT CLUSTER
TEST
ACTION
APPLICABILITY
1
Perform the Instrument Cluster Self Test using the following steps:
Turn the ignition off and wait 30 seconds.
Press and hold the Tripometer reset button while turning the ignition on.
When CHEC appears in the odometer, release the Tripometer button.
When 999 appears in the odometer, press and release the Tripometer reset button
again.
Observe the Fuel Level Gauge.
NOTE: There are 4 calibration points and they are as follows: #1 Empty, #2
1/8 Full, #3 1/4 Full, #4 Full.
Observe the gauge during the Self Test and compare the readings with the readings
described in the NOTE.
NOTE: With the DRB ensure there are no PCM Fuel Level Sensor DTCs. If
there are DTCs, they must be repaired before continuing.
Did the gauge reach the proper calibration points?
All
Yes
→
No
→
Replace the Instrument Cluster.
Perform ROAD TEST VERIFICATION - VER-2.
2
Turn the ignition off.
Disconnect the Fuel Level Sensor harness connector.
Disconnect the PCM harness connectors.
Measure the resistance of the Fuel Level Sensor Signal circuit.
Is the resistance below 10.0 ohms?
All
Yes
→
No
→
Repair the Fuel Level Sensor Signal circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
3
Turn the ignition off.
Disconnect the Fuel Level Sensor harness connector.
Disconnect the PCM harness connectors.
Measure the resistance between 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 ground.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
174
DRIVEABILITY - DIESEL
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст