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Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSIS PROCEDURE - P0580-SPEED CONTROL SWITCH #1 LOW

TEST ACTION APPLICABILITY
1
NOTE: Do not press any of the Speed Control Switch buttons.
Ignition on, engine not running.With the DRBIII®, read the Speed Control voltage.Is the Speed Control voltage below 1.0 volt?Yes --> Go To 2No --> Refer to the INTERMITTENT CONDITION .Perform POWERTRAIN VERIFICATION TEST VER - 4 - NGC .		 All
2 Ignition on, engine not running.
With the DRBIII®, monitor the Speed Control Switch voltage.
Disconnect the Speed Control On/Off Switch harness connector.
Did the voltage change to above 4.7 volts?
Yes --> Replace the Speed Control On/Off Switch.
Perform POWERTRAIN VERIFICATION TEST VER - 4 - NGC .
No --> Go To 3		 All
3 Ignition on, engine not running.
With the DRBIII®, monitor the Speed Control Switch voltage.
Disconnect the Speed Control Resume/Accel Switch harness connector.
Did the volt change to above 4.7 volts?
Yes --> Replace the Speed Control Resume/Accel Switch.
Perform POWERTRAIN VERIFICATION TEST VER - 4 - NGC .
No --> Go To 4		 All
4 Turn the ignition off.
Disconnect the Speed Control On/Off Switch harness connector.
Disconnect the Speed Control Resume/Accel Switch harness connector.
Disconnect the 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 between the (K4) Sensor ground circuit and the (V37) S/C Switch Signal circuit at the Speed Control Switch.
Is the resistance below 5.0 ohms?
Yes --> Repair the (V37) S/C Switch Signal circuit short to (K4) Sensor ground circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 4 - NGC .
No --> Go To 5		 All
5 Turn the ignition off.
Disconnect the Speed Control On/Off Switch harness connector.
Disconnect the Speed Control Resume/Accel Switch harness connector.
Disconnect the 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 between ground and the (V37) S/C Switch Signal circuit to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
Yes --> Repair the short to ground in the (V37) S/C Switch Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 4 - NGC .
No --> Go To 6		 All
6
NOTE: Before continuing, disconnect the PCM harness connector and check the related wiring terminals for corrosion, damage or terminal push out. Repair as necessary.
If 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 - NGC .		 All
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