Symptom:
P0581-SPEED CONTROL SWITCH #1 HIGH
When Monitored and Set Condition:
P0581-SPEED CONTROL SWITCH #1 HIGH
When Monitored: With the ignition key on. Battery voltage above 10 volts.
Set Condition: The PCM detects an open or short to voltage in the Speed Control Switch
Signal circuit. One Trip Fault.
POSSIBLE CAUSES
SPEED CONTROL SWITCH VOLTAGE HIGH
SPEED CONTROL SWITCHES
(V37) S/C SWITCH SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
(K4) SENSOR GROUND OPEN
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 above 4.8 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 Turn the ignition off.
Remove the Speed Control Switches from the steering wheel.
Measure the resistance across each Speed Control Switch.
Monitor the ohmmeter while pressing each function button on each switch.
Resume/Accel - 15,400 ohms
Cancel - 909 +/- 9 ohms
Decel (Coast) - 2940 +/- 30 ohms
On/Off - 0 ohms
Set - 6650 +/- 66 ohms
Does the function on the Speed Control Switches have the correct ohm value?
All
Yes → Go To 3
No → Replace the Speed Control Switch that had the incorrect resis-
tance value.
Perform POWERTRAIN VERIFICATION TEST VER-4-NGC.
216
DRIVEABILITY - NGC
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