Dodge Dakota (ND). Manual — part 756
P0586-SPEED CONTROL VENT CONTROL CIRCUIT (CONTINUED)
6.
(V35) S/C VENT CONTROL CIRCUIT OPEN
Turn the ignition off.
Disconnect the C3 PCM harness connector.
CAUTION: Do not probe the PCM harness connectors. Probing
the PCM harness connectors will damage the PCM terminals
resulting in poor terminal to pin connection. Install Miller Special
Tool #8815 to perform diagnosis.
Measure the resistance of the (V35) S/C Vent Sol Control circuit from
the Speed Control Servo harness connector to the appropriate termi-
nal of special tool # 8815.
Is the resistance below 5.0 ohms?
Yes
>> Go To 7
No
>> Repair the open/high resistance in the (V35) S/C Vent Sol
Control circuit.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9
- ENGINE - STANDARD PROCEDURE)
7.
(V35) SPEED CONTROL VENT SOLENOID CONTROL CIRCUIT SHORTED TO GROUND
Measure the resistance between ground and the (V35) S/C Vent Sol
Control circuit at the Speed Control Servo harness connector.
Is the resistance below 100 ohms?
Yes
>> Repair the short to ground in the (V35) S/C Vent Sol Con-
trol circuit.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9
- ENGINE - STANDARD PROCEDURE)
No
>> Go To 10
9 - 562
ENGINE ELECTRICAL DIAGNOSTICS
ND
P0586-SPEED CONTROL VENT CONTROL CIRCUIT (CONTINUED)
8.
(V32) S/C SUPPLY OPEN
Turn the ignition off.
Disconnect the C3 PCM harness connector.
CAUTION: Do not probe the PCM harness connectors. Probing
the PCM harness connectors will damage the PCM terminals
resulting in poor terminal to pin connection. Install Miller Special
Tool #8815 to perform diagnosis.
Measure the resistance of the (V32) S/C Supply circuit from the Stop
Lamp Switch harness connector to the appropriate terminal of special
tool #8815.
Is the resistance below 5.0 ohms?
Yes
>> Go To 9
No
>> Repair the open/high resistance in the (V32) S/C Supply
circuit.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9
- ENGINE - STANDARD PROCEDURE)
9.
(V32) S/C SUPPLY CIRCUIT SHORTED TO GROUND
Measure the resistance between ground and the (V32) S/C Supply cir-
cuit at the Speed Control Servo harness connector.
Is the resistance below 100 ohms?
Yes
>> Repair the short to ground in the (V32) S/C Supply circuit.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9
- ENGINE - STANDARD PROCEDURE)
No
>> Go To 10
10.
PCM
NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal
push out. Repair as necessary.
Were there any problems found?
Yes
>> Repair as necessary.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Replace and program the Powertrain Control Module per Service Information.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
ND
ENGINE ELECTRICAL DIAGNOSTICS
9 - 563
P0594-SPEED CONTROL SERVO POWER RELAY CIRCUIT
9 - 564
ENGINE ELECTRICAL DIAGNOSTICS
ND
P0594-SPEED CONTROL SERVO POWER RELAY CIRCUIT (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. The speed control switched on.
•
Set Condition:
The speed control power supply circuit is either open or shorted to ground. One Trip Fault. Three good trips to
turn off the MIL.
Possible Causes
(V32) S/C SUPPLY CIRCUIT OPEN
(V32) S/C SUPPLY CIRCUIT SHORTED TO GROUND
(V30) S/C BRAKE SWITCH OUTPUT CIRCUIT OPEN
(V30) S/C BRAKE SWITCH OUTPUT CIRCUIT SHORTED TO GROUND
STOP LAMP SWITCH
PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1.
ACTIVE DTC
NOTE: If this code is setting on a vehicle that doesn’t have a S/C Servo, flash the correct code into the PCM
or the wrong PCM may have previously been installed.
Ignition on, engine not running.
With a scan tool, read DTCs.
Is the DTC active at this time?
Yes
>> Go To 2
No
>> Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
ND
ENGINE ELECTRICAL DIAGNOSTICS
9 - 565
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