Symptom:
P1593-SPEED CONTROL SWITCH STUCK
When Monitored and Set Condition:
P1593-SPEED CONTROL SWITCH STUCK
When Monitored: Ignition on.
Set Condition: S/C Switch is mechanically stuck in the On/Off, Resume/Accel, or Set
position for too long. One trip fault.
POSSIBLE CAUSES
SPEED CONTROL SWITCH STATUS
SPEED CONTROL SWITCHES
(V37) S/C SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
(V37) S/C SIGNAL CIRCUIT OPEN
(K4) SENSOR GROUND OPEN
PCM
TEST ACTION APPLICABILITY
1 Start the engine.
With the DRBIIIt, monitor each switch function for the Speed Control Switches.
Press and release each Speed Control Button.
- Resume/Accel
- Cancel
- Decel (Coast)
- On/Off
- Set
Does each switch function change status when pressing and then depressing each
switch?
All
Yes → Refer to the INTERMITTENT CONDITION Symptom in the
Diagnostic category.
Perform POWERTRAIN VERIFICATION TEST VER-4-NGC.
No → Go To 2
259
DRIVEABILITY - NGC
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