Cruise Control: Testing and Inspection
AUTOMATIC SPEED CONTROL DEVICE (ASCD)Malfunction Detection Conditions
Fail Safe System Check
1. Turn ignition switch ON.
2. Turn ASCD (Automatic Speed Control Device) main switch to ON position and check if the "cruise indicator" blinks.
If the indicator lamp blinks, check the following.
^ ASCD steering switch. Refer to "DIAGNOSTIC PROCEDURE 5"
Fail-safe System Check:
3. Drive the vehicle at more than 48 kph (30 MPH) and push SET/COAST switch.
If the indicator lamp blinks, check the following:
^ Vehicle speed sensor. Refer to "DIAGNOSTIC PROCEDURE 6".
^ ASCD pump circuit Refer to "DIAGNOSTIC PROCEDURE 7".
^ Replace control unit.
4. Depress brake pedal slowly (brake pedal should be depressed more than 5 seconds)
If the indicator lamp blinks, check the following:
^ ASCD brake/stop lamp switch Refer to "DIAGNOSTIC PROCEDURE 4".
5. END. (System is OK.)
TROUBLE DIAGNOSES
Symptom Chart
Diagnostic Procedure 1 (Power Supply And Ground Circuit Check)
Diagnostic Procedure 2 (ASCD Main Switch Check)
Diagnostic Procedure 3 (ASCD Hold Relay Check)
Diagnostic Procedure 4 (ASCD Brake/Stop Lamp Switch Check
Diagnostic Procedure 5 (ASCD Steering Switch Check)
Diagnostic Procedure 6 (Vehicle Speed Sensor Check)
Diagnostic Procedure 7 (ASCD Pump Circuit Check)
Diagnostic Procedure 8 (ASCD Actuator/Pump Check)
ELECTRICAL COMPONENTS INSPECTION
ASCD Main Switch
ASCD Main Switch:
Check continuity between terminals by pushing switch to each position.
ASCD Brake Switch And Stop Lamp Switch
Check each switch after adjusting brake pedal.
ASCD Clutch Switch (For M/T Models)
Inhibitor Switch (For A/T Models)
Inhibitor Switch (For A/T Models):
