Problem Symptoms Table
If a normal code is displayed during the DTC check but the problem still occurs, check the circuits for each problem symptom in the order given in the table below and proceed to the relevant troubleshooting page.
HINT:
Inspect the "Fuse" and "Relay" before confirming the suspected area as shown in the charts below.
Inspect each malfunction circuit in numerical order for the corresponding symptom.
If the malfunction still exist even after checking and confirming that all the circuit are normal, replace the ECM.
SYMPTOM CHART
| Symptom | Suspect Area | See Procedure |
|---|---|---|
| Main switch cannot be turned ON. (Cruise indicator light in combination meter does not come on.) |
|
CRUISE CONTROL SWITCH CIRCUIT CRUISE MAIN INDICATOR LIGHT CIRCUIT ELECTRONIC CIRCUIT INSPECTION PROCEDURE |
| Vehicle speed setting cannot be done. (Although indicator light in combination meter comes on when the main switch is turned ON, it goes off when vehicle speed is set.) |
|
CRUISE CONTROL SWITCH CIRCUIT ELECTRONIC CIRCUIT INSPECTION PROCEDURE |
| Setting cannot be done. (Indicator light in combination meter comes on when the main switch is turned ON and it remains ON while setting.) |
|
CRUISE CONTROL SWITCH CIRCUIT P0571/52 BRAKE SWITCH "A" CIRCUIT DTC P0705: TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) HOW TO PROCEED WITH TROUBLESHOOTING ELECTRONIC CIRCUIT INSPECTION PROCEDURE |
| While the vehicle is driving with cruise control, the set control is canceled. (Indicator light and CRUISE remain ON.) |
|
CRUISE CONTROL SWITCH CIRCUIT DTC P0500/21 VEHICLE SPEED SENSOR CIRCUIT P0571/52 BRAKE SWITCH "A" CIRCUIT CRUISE MAIN INDICATOR LIGHT CIRCUIT DTC P0705: TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) ELECTRONIC CIRCUIT INSPECTION PROCEDURE |
| Hunting (Speed is not constant.) |
|
DTC P0500/21 VEHICLE SPEED SENSOR CIRCUIT MALFUNCTION IN SPEEDOMETER P1570/73 LASER RADAR SENSOR MALFUNCTION DISTANCE CONTROL ECU POWER SOURCE CIRCUIT ELECTRONIC CIRCUIT INSPECTION PROCEDURE |
| Setting cannot be cancelled. (When Coast, Acceleration, Resume, Set speed change and Control switch are operated.) |
|
CRUISE CONTROL SWITCH CIRCUIT ELECTRONIC CIRCUIT INSPECTION PROCEDURE |
| Erroneous detection or lost sight of the vehicle ahead. |
|
- ADJUSTMENT |
| Alarm buzzer does not sound. |
|
P1575/66 WARNING BUZZER MALFUNCTION (
) HOW TO PROCEED WITH TROUBLESHOOTING P1570/73 LASER RADAR SENSOR MALFUNCTION ELECTRONIC CIRCUIT INSPECTION PROCEDURE ELECTRONIC CIRCUIT INSPECTION PROCEDURE |
| Set distance cannot be changed. |
|
HOW TO PROCEED WITH TROUBLESHOOTING DISTANCE CONTROL SWITCH CIRCUIT ELECTRONIC CIRCUIT INSPECTION PROCEDURE |
| No display. |
|
HOW TO PROCEED WITH TROUBLESHOOTING ELECTRONIC CIRCUIT INSPECTION PROCEDURE |
| No brake control (when decelerating) |
|
DTC C0278/11, C0279/12: OPEN OR SHORT CIRCUIT IN ABS SOLENOID RELAY, SHORT CIRCUIT IN ABS SOLENOID RELAY CIRCUIT HOW TO PROCEED WITH TROUBLESHOOTING ELECTRONIC CIRCUIT INSPECTION PROCEDURE ELECTRONIC CIRCUIT INSPECTION PROCEDURE |
| Constant speed mode cannot be ON. |
|
CRUISE CONTROL SWITCH CIRCUIT ELECTRONIC CIRCUIT INSPECTION PROCEDURE HOW TO PROCEED WITH TROUBLESHOOTING |
| Vehicle speed setting cannot be cancelled with wiper Lo/Hi. (Including automatic wiper) |
|
RAIN SENSOR CIRCUIT WIPER SIGNAL CIRCUIT ELECTRONIC CIRCUIT INSPECTION PROCEDURE ELECTRONIC CIRCUIT INSPECTION PROCEDURE |
| Setting cannot be cancelled in SNOW mode. |
|
PATTERN SELECT SWITCH CIRCUIT HOW TO PROCEED WITH TROUBLESHOOTING ELECTRONIC CIRCUIT INSPECTION PROCEDURE |
| Unable to adjust (complete) the optical axis of the laser radar sensor. |
|
PRE-CHECK ADJUSTMENT - P1570/73 LASER RADAR SENSOR MALFUNCTION ELECTRONIC CIRCUIT INSPECTION PROCEDURE |