P0582-SPEED CONTROL VACUUM CONTROL CIRCUIT

For a complete wiring diagram Refer to Section 8W.

When Monitored:
Ignition on and battery voltage greater than 10 volts.
Set Condition:
An open or shorted condition detected in the Speed control vacuum solenoid control circuit. One Trip Fault. Three good trips to turn off the MIL.

Possible Causes

(V32) S/C SUPPLY CIRCUIT OPEN

(V32) S/C SUPPLY SHORT TO GROUND

(V36) S/C VACUUM SOL CONTROL CIRCUIT SHORTED TO GROUND

(V36) S/C VACUUM SOL CONTROL CIRCUIT OPEN

(Z384) GROUND CIRCUIT OPEN

SPEED CONTROL VACUUM SOLENOID

PCM

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

Diagnostic Test

1.SPEED CONTROL VACUUM CONTROL

Does the Speed Control Vacuum Solenoid actuate properly?

Yes

Refer to the INTERMITTENT CONDITION symptom in the Driveability category.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

Go To 2

2. (V30) S/C BRAKE SWITCH OUTPUT CIRCUIT

Does the test light illuminate brightly and flash on and off?

Yes

Go To 5

Go To 3

3.(V32) S/C SUPPLY CIRCUIT

Does the test light illuminate brightly?

Yes

Go To 4

Go To 8

4.(Z384) S/C GROUND CIRCUIT OPEN

Is the resistance below 5.0 ohms?

Yes

Go To 5

Repair the open in the (Z384) S/C Ground circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

5.SPEED CONTROL VACUUM SOLENOID

Does the test light illuminate brightly and flash on and off?

Yes

Replace the Speed Control Servo.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

Go To 6

6.(V36) S/C VACUUM SOL CONTROL CIRCUIT OPEN

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.

Is the resistance below 5.0 ohms?

Yes

Go To 7

Repair the open/high resistance in the (V36) S/C Vacuum Sol Control circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

7.(V36) SPEED CONTROL VACUUM SOLENOID CONTROL CIRCUIT SHORTED TO GROUND

Is the resistance below 100 ohms?

Yes

Repair the short to ground in the (V36) S/C Vacuum Sol Control circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

Go To 10

8.(V32) S/C SUPPLY OPEN

Is the resistance below 5.0 ohms?

Yes

Go To 9

Repair the open/high resistance in the (V32) S/C Supply circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

9.(V32) S/C SUPPLY CIRCUIT SHORTED TO GROUND

Is the resistance below 100 ohms?

Yes

Repair the short to ground in the (V32) S/C Supply circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

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 the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

Replace and program the Powertrain Control Module per Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)