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 Vent 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 and flash on and off?
All
Yes
→ Go To 4
No
→ Go To 6
4
Turn the ignition off.
Disconnect the S/C Servo harness connector.
Measure the resistance of the (Z115) 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 (Z155) S/C Ground circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 4 - NGC.
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 Vent Solenoid.
Using a 12-volt test light connected to battery voltage, probe the (V35) Speed Control
Vent Solenoid Control circuit in the Speed Control Servo harness connector.
Does the test light illuminate brightly and flash on and off?
All
Yes
→ Replace the Speed Control Servo.
Perform POWERTRAIN VERIFICATION TEST VER - 4 - NGC.
No
→ Go To 8
6
Turn the ignition off.
Disconnect the Brake Lamp 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 TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the (V32) S/C Supply circuit from the Brake Lamp Switch
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 (V32) S/C Supply circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 4 - NGC.
230
DRIVEABILITY - NGC
P0586-SPEED CONTROL VENT SOLENOID CIRCUIT —
Continued