Diagnostic Procedure
WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
P0586-SPEED CONTROL VENT SOLENOID CIRCUIT DIAGNOSTIC TEST REFERENCE
| TEST | ACTION | APPLICABILITY |
|---|---|---|
| 1 | Ignition on, engine not running. With the DRBIII®, read DTCs and record the related Freeze Frame data. With the DRBIII®, actuate the Speed Control Vent Solenoid and note operation. Does the Speed Control Vent Solenoid actuate properly? Yes --> Refer to the INTERMITTENT CONDITION SYMPTOM . Perform POWERTRAIN VERIFICATION TEST VER - 4 . No --> Go To 2 |
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| 2 | Turn the ignition off. Disconnect the S/C Servo harness connector. Turn the ignition on. Using the DRBIII®, actuate the S/C Vent Solenoid. Using a test light connected to ground, probe the (V30) S/C Brake Switch Output circuit in the S/C Servo harness connector. Does the test light illuminate brightly and flash on and off? Yes --> Go To 5 No --> Go To 3 |
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| 3 | Turn the ignition off. Disconnect the Brake Switch harness connector. Turn the ignition on. Using the DRBIII®, actuate the S/C Vent Solenoid. Using a test light connected to ground, probe the (V32) S/C Supply circuit in the Brake Switch harness connector. Does the test light illuminate brightly and flash on and off? Yes --> Go To 4 No --> Go To 8 |
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| 4 | Turn the ignition off. Disconnect the S/C Servo harness connector. Measure the resistance of the (Z212) S/C Ground circuit at the S/C Servo harness connector to ground. Is the resistance below 5.0 ohms? Yes --> Go To 5 No --> Repair the open in the (Z212) S/C Ground circuit. Perform POWERTRAIN VERIFICATION TEST VER - 4 . |
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| 5 | Turn the ignition off. Disconnect the Speed Control Servo harness connector. Ignition on, engine not running. With the DRBIII®, actuate the Speed Control Vent Solenoid. Using a 12-volt test light connected to battery voltage, probe the (V35) Speed Control Vent Solenoid Control circuit in the Speed Control Servo harness connector. Does the test light illuminate brightly and flash on and off? Yes --> Replace the Speed Control Servo. Perform POWERTRAIN VERIFICATION TEST VER - 4 . No --> Go To 6 |
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| 6 | Turn the ignition off. Disconnect the S/C Servo harness connector. 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 terminal 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 VER - 4 . |
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| 7 | Turn the ignition off. Disconnect the S/C Servo harness connector. Disconnect the C3 PCM harness connector. 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) Speed Control Vent Solenoid Control circuit. Perform POWERTRAIN VERIFICATION TEST VER - 4 . No --> Go To 10 |
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| 8 | Turn the ignition off. Disconnect the Brake Lamp Switch harness connector. 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 Brake 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 VER - 4 . |
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| 9 | Turn the ignition off. Disconnect the Brake Switch harness connector. Disconnect the C3 PCM harness connector. Measure the resistance between ground and the (V32) S/C Supply circuit 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 VER - 4 . No --> Go To 10 |
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| 10 |
NOTE:
Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary. If the there are no possible causes remaining, view repair.RepairReplace and program the Powertrain Control Module in accordance with the Service Information.Perform POWERTRAIN VERIFICATION TEST VER - 4 . |
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