TEST ACTION APPLICABILITY
2 Turn the ignition off.
Disconnect the PCM harness connector.
Disconnect the Brake Lamp Switch 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 Power 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 3
No → Repair the open/high resistance in the (V32) S/C Power Supply
circuit between the PCM and Brake Switch.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
3 Turn the ignition off.
Disconnect the PCM harness connector.
Disconnect the Brake Switch harness connector.
Measure the resistance between ground and the (V32) S/C Power Supply circuit in
the Brake Switch harness connector.
Is the resistance below 100 ohms?
All
Yes → Go To 4
No → Repair the short to ground in the (V32) S/C Power Supply circuit.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
4 Turn the ignition off.
Disconnect the S/C Servo harness connector.
Disconnect the Brake Switch harness connector.
Measure the resistance of the (V40) S/C Brake Switch Output circuit from the Brake
Switch harness connector to the S/C Servo harness connector.
Is the resistance below 5.0 ohms?
All
Yes → Go To 5
No → Repair the open/high resistance in the (V40) S/C Brake Switch
Output circuit.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
5 Turn the ignition off.
Disconnect the Speed Control Servo harness connector.
Disconnect the Brake Switch harness connector.
Measure the resistance between ground and the (V40) S/C Brake Switch Output
circuit at the Speed Control Servo harness connector.
Is the resistance below 100 ohms?
All
Yes → Repair the short to ground in the (V40) S/C Brake Switch Output
circuit.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
No → Go To 6
234
DRIVEABILITY - NGC
P0594-SPEED CONTROL SERVO POWER CIRCUIT — Continued
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