Dodge Durango (HB). Manual — part 944
P1593-SPEED CONTROL SWITCH 1/2 STUCK (CONTINUED)
14.
PCM
NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal
push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and
Ground circuits.
Were there any problems found?
Yes
>> Repair as necessary.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Replace and program the Powertrain Control Module per Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
HB
ENGINE ELECTRICAL DIAGNOSTICS
9 - 775
P1593-SPEED CONTROL SWITCH 1 STUCK (3.7L, 4.7L)
9 - 776
ENGINE ELECTRICAL DIAGNOSTICS
HB
P1593-SPEED CONTROL SWITCH 1 STUCK (3.7L, 4.7L) (CONTINUED)
For the Engine circuit diagram (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS).
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Ignition on.
•
Set Condition:
S/C Switch No.1 is mechanically stuck in the On/Off, Resume/Accel, or Set position for too long. One trip fault.
Possible Causes
(V37) S/C SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
(V37) S/C SIGNAL CIRCUIT OPEN
(K900) SENSOR GROUND OPEN
(V37) S/C SIGNAL CIRCUIT SHORTED TO GROUND
(V37) S/C SIGNAL CIRCUIT SHORTED TO THE (K900) SENSOR GROUND
SPEED CONTROL SWITCH
PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1.
SPEED CONTROL SWITCH STATUS
Start the engine.
With a scan tool, monitor each which function for the Speed Control Switches.
Press and release each Speed Control Button.
- Resume/Accel
- Cancel
- Decel (Coast)
- On/Off
- Set
Does each switch function change status when pressing each switch?
Yes
>> Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 2
HB
ENGINE ELECTRICAL DIAGNOSTICS
9 - 777
P1593-SPEED CONTROL SWITCH 1 STUCK (3.7L, 4.7L) (CONTINUED)
2.
SPEED CONTROL SWITCHES
Turn the ignition off.
Disconnect and remove the Speed Control Switches from the steering wheel per Service Information.
Measure the resistance across each Speed Control Switch.
Monitor the ohmmeter while pressing each function button on each switch.
Resume/Accel - 15.4 kohms
Cancel - 1.24 kohms
Coast - 2.94 kohms
On/Off -0.47 kohms
Set - 5.49 kohms
Does the function on the Speed Control Switches have the correct resistance value?
Yes
>> Go To 3
No
>> Replace the Speed Control Switch that had the incorrect resistance value.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
3.
(V37) S/C SWITCH NO.1 SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
Turn the ignition off.
Disconnect the C2 and C3 PCM harness connectors.
Measure the voltage of the (V37) S/C Switch No.1 Signal circuit in the
Speed Control harness connector.
Is the voltage above 5.0 volts?
Yes
>> Repair the short to battery voltage in the (V37) S/C Signal
No.1 circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer
to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 4
9 - 778
ENGINE ELECTRICAL DIAGNOSTICS
HB
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