Dynamic Laser Cruise Control System
PROBLEM SYMPTOMS TABLE
| Symptom | Suspected area | See |
|---|---|---|
| Main switch cannot be turned ON. (Cruise indicator light in combination meter does not come on.) | 1. Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| 2. CRUISE main indicator light circuit | CRUISE MAIN INDICATOR LIGHT CIRCUIT | |
| 3. ECM | TERMINALS OF ECU | |
| 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.) | 1. Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| 2. ECM | TERMINALS OF ECU | |
| Setting cannot be done. (Indicator light in combination meter comes on when the main switch is turned ON and it remains ON while setting.) | 1. Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| 2. Stop light switch circuit | DTC P0571 BRAKE SWITCH "A" CIRCUIT | |
| 3. Park/Neutral position switch circuit (DTC P0705) | AX-38DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) | |
| 4. Transmission control switch circuit | AX-125TRANSMISSION CONTROL SWITCH CIRCUIT | |
| 5. Combination meter system | ME-14SYSTEM DESCRIPTION | |
| 6. ECM | TERMINALS OF ECU | |
| While the vehicle is driven with cruise control, the set control is cancelled. (Indicator light and CRUISE remain ON.) | 1. Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| 2. Vehicle speed sensor circuit | DTC P0500 VEHICLE SPEED SENSOR MALFUNCTION; DTC P0503 VEHICLE SPEED SENSOR CIRCUIT MALFUNCTION | |
| 3. Stop light switch circuit | DTC P0571 BRAKE SWITCH "A" CIRCUIT | |
| 4. Cruise main indicator light circuit | CRUISE MAIN INDICATOR LIGHT CIRCUIT | |
| 5. Park/Neutral position switch circuit (DTC P0705) | AX-38DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) | |
| 6. ECM | TERMINALS OF ECU | |
| Hunting (Speed is not constant.) | 1. Vehicle speed sensor circuit | DTC P0500 VEHICLE SPEED SENSOR MALFUNCTION; DTC P0503 VEHICLE SPEED SENSOR CIRCUIT MALFUNCTION |
| 2. Malfunction in speed meter circuit | ME-14SPEEDOMETER MALFUNCTION | |
| 3. Laser sensor power source circuit | LASER SENSOR POWER SOURCE CIRCUIT | |
| 4. Distance control ECU power source circuit | DISTANCE CONTROL ECU POWER SOURCE CIRCUIT | |
| 5. Distance control ECU | DISTANCE CONTROL ECU POWER SOURCE CIRCUIT | |
| 6. ECM | TERMINALS OF ECU | |
| Setting cannot be cancelled. (When Coast, Acceleration, Resume, Set speed change and Control switch are operated.) | 1. Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| 2. ECM | TERMINALS OF ECU | |
| Erroneous detection or lost sight of the vehicle ahead. | 1. Clean laser sensor with soft cloth, etc. | REMOVAL |
| 2. Improper aiming of sensor beam axis | ADJUSTMENT | |
| Alarm buzzer does not sound. | 1. Buzzer circuit | BC-230SKID CONTROL BUZZER CIRCUIT |
| 2. VSC system | BC-101VEHICLE STABILITY CONTROL SYSTEM | |
| 3. Laser sensor power source circuit | LASER SENSOR POWER SOURCE CIRCUIT | |
| 4. Distance control ECU power source circuit | DISTANCE CONTROL ECU POWER SOURCE CIRCUIT | |
| 5. Distance control ECU | TERMINALS OF ECU | |
| 6. ECM | TERMINALS OF ECU | |
| Set distance cannot be changed. | 1. Combination meter system | ME-14SYSTEM DESCRIPTION |
| 2. Distance control switch circuit | DISTANCE CONTROL SWITCH CIRCUIT | |
| 3. Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT | |
| 4. ECM | TERMINALS OF ECU | |
| No display | 1. Combination meter system | ME-14 |
| 2. ECM | TERMINALS OF ECU | |
| No brake control (when decelerating) | 1. VSC system | BC-101 |
| 2. Distance control ECU power source circuit | DISTANCE CONTROL ECU POWER SOURCE CIRCUIT | |
| 3. Distance control ECU | TERMINALS OF ECU | |
| 4. ECM | TERMINALS OF ECU | |
| Constant speed mode cannot be turned on. | 1. Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| 2. Combination meter system | ME-14 | |
| 3. ECM | TERMINALS OF ECU | |
| Vehicle speed setting cannot be cancelled with wiper LO/HI. (Including automatic wiper) | 1. Rain sensor circuit | MP-63 |
| 2. Wiper switch circuit | WIPER SIGNAL CIRCUIT | |
| 3. Distance control ECU | TERMINALS OF ECU | |
| 4. ECM | TERMINALS OF ECU | |
| Unable to adjust (complete) beam axis of millimeter wave radar sensor. | 1. Check for DTC P1570 | DTC P1570 RADAR SENSOR MALFUNCTION |
| 2. Check position, distance and angle of reflector | REMOVAL | |
| 3. Check installation of laser sensor | REMOVAL | |
| 4. Laser sensor | LASER SENSOR POWER SOURCE CIRCUIT | |
| 5. ECM | TERMINALS OF ECU |