Symptom:
P0580-SPEED CONTROL SWITCH #1 LOW
When Monitored and Set Condition:
P0580-SPEED CONTROL SWITCH #1 LOW
When Monitored: With the ignition key on. Battery voltage above 10 volts.
Set Condition: The PCM detects the Speed Control Switch Signal circuit voltage is less
than 0.43. One Trip Fault.
POSSIBLE CAUSES
SPEED CONTROL SWITCH VOLTAGE LOW
SPEED CONTROL ON/OFF SWITCH
SPEED CONTROL RESUME/ACCEL SWITCH
(V37) S/C SWITCH SIGNAL CIRCUIT SHORTED TO (K4) SENSOR GROUND
(V37) S/C SWITCH SIGNAL CIRCUIT SHORTED TO GROUND
PCM
TEST ACTION APPLICABILITY
1 NOTE: Do not press any of the Speed Control Switch buttons.
Ignition on, engine not running.
With the DRBIIIt, read the Speed Control voltage.
Is the Speed Control voltage below 1.0 volt?
All
Yes → Go To 2
No → Refer to the INTERMITTENT CONDITION symptom in the
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER-4-NGC.
2 Ignition on, engine not running.
With the DRBIIIt, monitor the Speed Control Switch voltage.
Disconnect the Speed Control On/Off Switch harness connector.
Did the voltage change to above 4.7 volts?
All
Yes → Replace the Speed Control On/Off Switch.
Perform POWERTRAIN VERIFICATION TEST VER-4-NGC.
No → Go To 3
3 Ignition on, engine not running.
With the DRBIIIt, monitor the Speed Control Switch voltage.
Disconnect the Speed Control Resume/Accel Switch harness connector.
Did the volt change to above 4.7 volts?
All
Yes → Replace the Speed Control Resume/Accel Switch.
Perform POWERTRAIN VERIFICATION TEST VER-4-NGC.
No → Go To 4
225
DRIVEABILITY - NGC