TEST
ACTION
APPLICABILITY
10
NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay
particular attention to all Power and Ground circuits.
If the there are no possible causes remaining, view repair.
All
Repair
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 4.
11
Turn the ignition off.
Disconnect the S/C Servo harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the S/C Brake Switch Output
circuit in the S/C Servo harness connector.
Does the test light illuminate brightly?
All
Yes
→ Replace the Speed Control Servo.
Perform POWERTRAIN VERIFICATION TEST VER - 4.
No
→ Go To 12
12
Turn the ignition off.
Disconnect the Speed Control Servo harness connector.
Disconnect the Brake Lamp Switch harness connector.
Measure the resistance of the (V30) Speed Control Brake Switch Output circuit
between the Speed Control Servo harness connector and Brake Lamp Switch harness
connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 13
No
→ Repair the open in the (V30) Speed Control Brake Switch Output
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 4.
13
Disconnect the Brake Lamp Switch harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the Speed Control Power Supply
circuit in the Brake Lamp Switch harness connector.
Does the test light illuminate brightly?
All
Yes
→ Replace the Brake Lamp Switch.
Perform POWERTRAIN VERIFICATION TEST VER - 4.
No
→ Go To 14
14
Turn the ignition off.
Disconnect the PCM harness connector.
Disconnect the Brake Lamp Switch harness connector.
Measure the resistance of the (V32) Speed Control Power Supply circuit between the
PCM harness connector and the Brake Lamp Switch harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 15
No
→ Repair the open in the Speed Control Supply circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 4.
195
DRIVEABILITY - SBEC
P1595-SPEED CONTROL SOLENOID CIRCUITS —
Continued