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 PROBLEM SYMPTOMS TABLE and proceed to the relevant troubleshooting .
HINT:
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.
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 ECM | |
| Vehicle speed setting cannot be done. (Although indicator light in combination meter come 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 ECM | |
| Setting cannot be done. (Indicator light in combination meter come 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 | CRUISE CONTROL SWITCH CIRCUIT | |
| 3. Park/Neutral position switch circuit | DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) | |
| 4. Combination meter system | COMBINATION METER | |
| 5. ECM | TERMINALS OF ECM | |
| While the vehicle is driving with cruise control, the set control is canceled. (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 STOP LIGHT SWITCH CIRCUIT MALFUNCTION | |
| 4. Cruise main indicator light circuit | CRUISE MAIN INDICATOR LIGHT CIRCUIT | |
| 5. Park/Neutral position switch circuit | DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) | |
| 6. ECM | TERMINALS OF ECM | |
| 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 speedometer circuit | SPEEDOMETER MALFUNCTION | |
| 3. Laser radar sensor circuit | TERMINALS OF ECM | |
| 4. Distance control ECU circuit | TERMINALS OF ECM | |
| 5. ECM | TERMINALS OF ECM | |
| Setting cannot be cancelled. (When Coast, Acceleration, Resume, Set speed change and Control switch are operated.) | 1. Cruise control switch circuit | CRUISE CONTROL MAIN SWITCH |
| 2. ECM | TERMINALS OF ECM | |
| Erroneous detection or lost sight of the vehicle ahead. | 1. Clean laser radar sensor | - |
| 2. Improper aiming of laser sensor beam axis | DTC P1572 IMPROPER AIMING OF RADAR SENSOR BEAM AXIS | |
| Alarm buzzer does not sound. | 1. Buzzer circuit | DTC P1575 WARNING BUZZER MALFUNCTION |
| 2. VSC system | VEHICLE STABILITY CONTROL SYSTEM | |
| 3. Laser radar sensor circuit | TERMINALS OF ECM | |
| 4. Distance control ECU | TERMINALS OF ECM | |
| 5. ECM | TERMINALS OF ECM | |
| Set distance cannot be changed. | 1. Combination meter system | COMBINATION METER |
| 2. Distance control switch | CRUISE CONTROL MAIN SWITCH | |
| 3. ECM | TERMINALS OF ECM | |
| No display. | 1. Combination meter system | COMBINATION METER |
| 2. ECM | TERMINALS OF ECM | |
| No brake control (when decelerating) | 1. ABS solenoid circuit | DTC C0278/11 OPEN IN ABS SOLENOID RELAY CIRCUIT; DTC C0279/12 SHORT TO B+ IN ABS SOLENOID RELAY CIRCUIT |
| 2. VSC system | VEHICLE STABILITY CONTROL SYSTEM | |
| 3. Distance control ECU | TERMINALS OF ECM | |
| 4. ECM | TERMINALS OF ECM | |
| Constant speed mode cannot be ON. | 1. Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| 2. Wire harness | - | |
| 3. ECM | TERMINALS OF ECM | |
| 4. Combination meter system | COMBINATION METER | |
| Vehicle speed setting cannot be cancelled with wiper Lo/Hi. (Including automatic wiper) | 1. Rain sensor system | - |
| 2. Wiper system | WIPER AND WASHER SYSTEM | |
| 3. Distance control ECU | TERMINALS OF ECM | |
| 4. ECM | TERMINALS OF ECM | |
| Setting cannot be cancelled in SNOW mode. | 1. Pattern select switch circuit | - |
| 2. Automatic transmission system | SYSTEM DESCRIPTION | |
| 3. ECM | TERMINALS OF ECM |