TEST
ACTION
APPLICABILITY
10
Turn the ignition off.
Disconnect the S/C Servo harness connector.
Turn the ignition on.
Using the S/C ON/OFF-SET button, turn the S/C 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 SPEED CONTROL VERIFICATION - VER-4.
No
→
Go To
11
11
Turn the ignition off.
Disconnect the Speed Control Servo harness connector.
Disconnect the Brake Lamp Switch harness connector.
Measure the resistance of the 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
12
No
→
Repair the Speed Control Brake Switch Output circuit for an
open.
Perform SPEED CONTROL VERIFICATION - VER-4.
12
Disconnect the Brake Lamp Switch harness connector.
Turn the ignition on.
Using the S/C ON/OFF-SET button, select S/C 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 SPEED CONTROL VERIFICATION - VER-4.
No
→
Go To
13
13
Turn the ignition off.
Disconnect the PCM harness connector.
Disconnect the Brake Lamp Switch harness connector.
Measure the resistance of the 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
14
No
→
Repair the Speed Control Supply circuit for an open.
Perform SPEED CONTROL VERIFICATION - VER-4.
14
If there are no possible causes remaining, view repair.
All
Repair
Replace the Powertrain Control Module in accordance with the
Service Information.
Perform SPEED CONTROL VERIFICATION - VER-4.
280
SPEED CONTROL
P1595-SPEED CONTROL SOLENOID CIRCUITS —
Continued