TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the Brake Switch harness connector.
Turn the ignition on.
Using the DRBIII
t, actuate the S/C Vacuum 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?
All
Yes
→ Go To 4
No
→ Go To 8
4
Turn the ignition off.
Disconnect the S/C Servo harness connector.
Measure the resistance of the (Z901) S/C Ground circuit at the S/C Servo harness
connector to ground.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 5
No
→ Repair the open in the (Z901) S/C Ground circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 4.
5
Turn the ignition off.
Disconnect the Speed Control Servo harness connector.
Ignition on, engine not running.
With the DRBIII
t, actuate the Speed Control Vacuum Solenoid.
Using a 12-volt test light connected to battery voltage, probe the S/C Vacuum Control
circuit.
Does the test light illuminate brightly and flash on and off?
All
Yes
→ Replace the Speed Control Servo.
Perform POWERTRAIN VERIFICATION TEST VER - 4.
No
→ Go To 6
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 TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the (V36) S/C Vacuum 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?
All
Yes
→ Go To 7
No
→ Repair the open/high resistance in the (V36) S/C Vacuum Sol
Control circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 4.
221
DRIVEABILITY - NGC
P0582-SPEED CONTROL VACUUM SOLENOID CIRCUIT —
Continued