Dodge Durango (HB). Manual — part 917
P0593-SPEED CONTROL SWITCH 2 CIRCUIT HIGH
HB
ENGINE ELECTRICAL DIAGNOSTICS
9 - 667
P0593-SPEED CONTROL SWITCH 2 CIRCUIT HIGH (CONTINUED)
For the Engine circuit diagram (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS).
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition key on.
•
Set Condition:
Speed Control Switch No.2 input above the maximum acceptable voltage at the PCM. One trip fault.
Possible Causes
(V38) S/C SIGNAL NO.2 CIRCUIT SHORTED TO VOLTAGE
(V38) S/C SWITCH NO.2 SIGNAL CIRCUIT OPEN BETWEEN THE PCM AND CLOCKSPRING
(V937) SWITCH RETURN CIRCUIT OPEN BETWEEN PCM AND CLOCKSPRING
(V38) S/C SWITCH NO.2 SIGNAL CIRCUIT OPEN BETWEEN THE CLOCKSPRING AND S/C SWITCH
(V937) SWITCH RETURN CIRCUIT OPEN BETWEEN CLOCKSPRING AND S/C SWITCH
CLOCKSPRING
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 VOLTAGE HIGH
NOTE: Do not press any of the Speed Control Switch buttons.
Ignition on, engine not running.
With a scan tool, read the Speed Control voltage.
Is the Speed Control voltage above 4.8 volts?
Yes
>> Go To 2
No
>> Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
9 - 668
ENGINE ELECTRICAL DIAGNOSTICS
HB
P0593-SPEED CONTROL SWITCH 2 CIRCUIT HIGH (CONTINUED)
2.
SPEED CONTROL SWITCHES
Disconnect and remove the Speed Control Switches from the steering wheel.
Measure the resistance across each Speed Control Switch.
Monitor the ohmmeter while pressing each function button on each switch.
The following resistance specs are taken between terminals (V38) S/C Switch No.2 Signal and (V937) S/C Switch
Return circuits of the Switch when holding the switch button in the following position.
Not pressing any switch - 20.5 kohms
On/Off - 8.87 kohms
Set - 0.825 kohms
Coast - 0.47 kohms
Cancel - 3.92 kohms
Resume/Accel - 1.87 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)
HB
ENGINE ELECTRICAL DIAGNOSTICS
9 - 669
P0593-SPEED CONTROL SWITCH 2 CIRCUIT HIGH (CONTINUED)
3.
CLOCKSPRING
Disconnect the C1 and C3 Clockspring harness connectors per Ser-
vice Information.
Measure the resistance of the (V937) Switch Return circuit between
the upper and lower clockspring harness connectors.
Measure the resistance of the (V38) S/C Switch No.2 Signal circuit
between the C1 and C3 Clockspring harness connectors.
Was the resistance above 5.0 ohms for either circuit?
Yes
>> Replace the clockspring.
Perform the POWERTRAIN VERIFICATION TEST. (Refer
to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 4
4.
(V38) SIGNAL NO.2 CIRCUIT SHORTED TO BATTERY VOLTAGE
Connect the C1 and C3 Clockspring harness connectors per Service
Information.
Disconnect the C3 PCM harness connector.
Measure the voltage on the (V38) S/C Signal No.2 circuit in the Speed
Control harness connector.
Ignition on, engine not running.
Is the voltage above 5.2 volts?
Yes
>> Repair the short to battery voltage in the (V38) S/C Signal
No.2 circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer
to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 5
9 - 670
ENGINE ELECTRICAL DIAGNOSTICS
HB
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