Pinpoint Test F - System Will Not Set
- Verify condition. Check throttle linkage for proper operation and adjustment. Adjust and service as necessary. If throttle linkage is okay, check all harness connectors for security. If all harness connectors are okay, perform CONTROL SWITCHES test under DIAGNOSIS & TESTING. If control switches are okay, go to next step.
- Test dump valve. See VACUUM DUMP VALVE under DIAGNOSIS & TESTING. If dump valve is okay, check clutch switch for proper operation. See CLUTCH SWITCH under DIAGNOSIS & TESTING. If clutch switch is okay, apply brake pedal and observe brakelights. Service brakelight circuit as necessary. If brakelights are okay, go to next step.
- Perform appropriate SERVO test under DIAGNOSIS & TESTING. Replace servo as necessary. If servo is okay, perform VEHICLE SPEED SENSOR (VSS) test under DIAGNOSIS & TESTING. Replace VSS as necessary. If VSS is okay, check amplifier and replace as necessary. See AMPLIFIER TEST under DIAGNOSIS & TESTING.