Dodge Dakota (R1). Manual — part 165
TEST
ACTION
APPLICABILITY
7
Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Vehicle Speed Sensor harness connector.
Note: Check connectors - Clean/repair as necessary.
Remove the ASD/Diesel Power Relay from the PDC.
Connect a jumper wire between ASD/Diesel Power Relay cavities 30 and 87 (in PDC).
Turn the ignition on.
Measure the voltage of the Vehicle Speed Sensor Signal circuit.
Is the voltage above 5.5 volts?
All
Yes
→
No
→
Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
8
If there are no possible causes remaining, view repair.
All
Repair
Repair the Vehicle Speed Sensor Signal circuit for a short to
voltage.
Perform ROAD TEST VERIFICATION - VER-2.
9
Turn the ignition off.
Disconnect the Vehicle Speed Sensor harness connector.
Disconnect the PCM C1 and C2 harness connectors.
Check connectors - Clean/repair as necessary
Measure the resistance between the Vehicle Speed Sensor Signal circuit and the
5-volt Supply circuit.
Is the resistance above 100 kohms?
All
Yes
→
No
→
Repair the Vehicle Speed Sensor Signal circuit for a short to the
5-volt Supply circuit.
Perform ROAD TEST VERIFICATION - VER-2.
10
Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Vehicle Speed Sensor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Vehicle Speed Sensor Signal circuit.
Is the resistance below 5.0 ohms?
All
Yes
→
No
→
Repair the Vehicle Speed Sensor Signal circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
11
Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Vehicle Speed Sensor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between ground and the Vehicle Speed Sensor Signal circuit.
Is the resistance above 100 kohms?
All
Yes
→
No
→
Repair the Vehicle Speed Sensor Signal circuit for a short to
ground.
Perform ROAD TEST VERIFICATION - VER-2.
195
DRIVEABILITY - DIESEL
*CHECKING THE VEHICLE SPEED SIGNAL —
Continued
TEST
ACTION
APPLICABILITY
12
Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Vehicle Speed Sensor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Vehicle Speed Sensor Ground circuit.
Is the resistance below 5.0 ohms?
All
Yes
→
No
→
Repair the Vehicle Speed Sensor Ground circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
13
Turn the ignition off.
Disconnect the Vehicle Speed Sensor harness connector.
NOTE: Ensure the ECM and PCM harness connectors are connected before
continuing.
Turn the ignition on.
Connect a jumper wire to the Vehicle Speed Sensor Signal circuit in the VSS harness
connector.
With the DRB, monitor the VEHICLE SPEED while tapping the other end of the
jumper wire to ground.
Does the DRB display km/h (MPH) greater than 0?
All
Yes
→
Replace the Vehicle Speed Sensor.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
14
Turn the ignition off.
Disconnect the Vehicle Speed Sensor harness connector.
Disconnect the PCM harness connectors.
Check connectors - Clean/repair as necessary
Measure the resistance between the Vehicle Speed Sensor Signal circuit and the
Sensor Ground circuit.
Is the resistance above 100 kohms?
All
Yes
→
No
→
Repair the Vehicle Speed Sensor Signal circuit for a short to the
Sensor Ground circuit.
Perform ROAD TEST VERIFICATION - VER-2.
15
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
16
Turn the ignition off.
Disconnect the Vehicle Speed Sensor harness connector.
Disconnect the PCM harness connectors.
Check connectors - Clean/repair as necessary
Turn the ignition on.
Measure the voltage between ground and the 5-volt Supply circuit.
Is the voltage below 0.5 volt?
All
Yes
→
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
196
DRIVEABILITY - DIESEL
*CHECKING THE VEHICLE SPEED SIGNAL —
Continued
TEST
ACTION
APPLICABILITY
17
Turn the ignition off.
Repair the 5-volt Supply circuit for a short to voltage.
Reconnect all harness connectors except the Vehicle Speed Sensor harness connector.
Turn the ignition on.
Measure the voltage of the 5-volt Supply circuit.
Is the voltage above 4.8 volts?
All
Yes
→
The repair is complete.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
18
Turn the ignition off.
Disconnect the Vehicle Speed Sensor harness connector.
Disconnect the PCM C1 harness connector.
Check connectors - Clean/repair as necessary
Measure the resistance of the 5-volt Supply circuit between the Vehicle Speed Sensor
harness connector and the PCM C1 harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→
No
→
Repair the 5-volt Supply circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
19
Turn the ignition off.
Disconnect the Vehicle Speed Sensor harness connector.
Disconnect the PCM harness connectors.
Check connectors - Clean/repair as necessary
Measure the resistance between ground and the 5-volt Supply circuit.
Is the resistance above 100 kohms?
All
Yes
→
No
→
Repair the 5-volt Supply circuit for a short to ground.
Perform ROAD TEST VERIFICATION - VER-2.
20
Turn the ignition off.
Disconnect the Vehicle Speed Sensor harness connector.
Disconnect the PCM harness connectors.
Check connectors - Clean/repair as necessary
Measure the resistance between the 5-volt Supply circuit and the Sensor Ground
circuit in the Vehicle Speed Sensor harness connector.
Is the resistance above 100 kohms?
All
Yes
→
No
→
Repair the 5-volt Supply circuit for a short to the Sensor Ground
circuit.
Perform ROAD TEST VERIFICATION - VER-2.
21
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 ROAD TEST VERIFICATION - VER-2.
197
DRIVEABILITY - DIESEL
*CHECKING THE VEHICLE SPEED SIGNAL —
Continued
Symptom:
*CHECKING THE WAIT TO START LAMP OPERATION
POSSIBLE CAUSES
ACTUATE THE WAIT TO START LAMP WITH THE DRB
INSTRUMENT CLUSTER - LAMP NEVER ON
INSTRUMENT CLUSTER - LAMP ON CONTINUOUSLY
WAIT TO START LAMP BULB
ENGINE CONTROL MODULE - FAILS TO ACTIVATE LAMP
ENGINE CONTROL MODULE - LAMP ON CONTINUOUSLY
WAIT TO START LAMP CONTROL CIRCUIT SHORTED TO VOLTAGE
WAIT TO START LAMP CONTROL CIRCUIT OPEN
WAIT TO START LAMP CONTROL CIRCUIT SHORTED TO GROUND
TEST
ACTION
APPLICABILITY
1
Turn the ignition on and observe the Wait To Start Lamp.
Did the Wait To Start Lamp illuminate and stay on longer than 20 seconds?
All
Yes
→
No
→
2
Turn the ignition off.
Disconnect the ECM harness connectors.
Turn the ignition on.
Is the Glow Plug Lamp on?
All
Yes
→
No
→
Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
3
Turn the ignition off.
Disconnect the PCM harness connectors.
Disconnect the ECM harness connectors.
Measure the resistance between ground and the Wait To Start Lamp Control circuit.
Is the resistance above 100 kohms?
All
Yes
→
Replace the Instrument Cluster in accordance with the Service
Information.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
Repair the Wait To Start Lamp Control circuit for a short to
ground.
Perform ROAD TEST VERIFICATION - VER-2.
198
DRIVEABILITY - DIESEL
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