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 step.
CRUISE CONTROL SYSTEM (w/o Electronic Throttle Control System)
CRUISE CONTROL SYSTEM (W/O ELECTRONIC THROTTLE CONTROL SYSTEM) PROBLEM SYMPTOM
| Symptom | Suspected area | See example |
|---|---|---|
| SET not occurring or CANCEL occurring. (DTC is Normal) | 1. Cruise control main switch circuit (Cruise control switch) | CRUISE CONTROL SWITCH CIRCUIT |
| 2. Vehicle speed sensor circuit | DTC 21 OPEN VEHICLE SPEED SENSOR CIRCUIT; DTC 23 VEHICLE SPEED SIGNAL ABNORMAL | |
| 3. Stop light switch circuit | STOP LIGHT SWITCH CIRCUIT | |
| 4. Park/neutral position switch circuit (A/T) | DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) | |
| 5. Clutch switch circuit (M/T) | CLUTCH SWITCH CIRCUIT | |
| 6. Actuator motor circuit | DTC 11 ACTUATOR MOTOR CIRCUIT; DTC 15 ACTUATOR MOTOR CIRCUIT | |
| 7. Cruise control cable | CRUISE CONTROL SWITCH CIRCUIT | |
| 8. Cruise control ECU assembly | CRUISE CONTROL SWITCH CIRCUIT | |
| SET not occurring or CANCEL occurring. (DTC dose not output) | 1. ECU power source circuit | ECU POWER SOURCE CIRCUIT |
| 2. Cruise control ECU assembly | CRUISE CONTROL SWITCH CIRCUIT | |
| Actual vehicle speed deviates above or below the set speed. | 1. Cruise control cable | CRUISE CONTROL SWITCH CIRCUIT |
| 2. Vehicle speed signal abnormal | DTC 21 OPEN VEHICLE SPEED SENSOR CIRCUIT; DTC 23 VEHICLE SPEED SIGNAL ABNORMAL | |
| 3. Electronically controlled transmission communication circuit (A/T) | ECU POWER SOURCE CIRCUIT | |
| 4. Actuator motor circuit | DTC 11 ACTUATOR MOTOR CIRCUIT; DTC 15 ACTUATOR MOTOR CIRCUIT | |
| 5. Idle signal circuit (Main throttle position sensor) | DTC 51 IDLE SIGNAL CIRCUIT | |
| 6. Cruise control ECU assembly | CRUISE CONTROL SWITCH CIRCUIT | |
| A/T: Gear shifting frequent between 3rd and O/D when driving on uphill road. (Hurting) | 1. Electronically controlled transmission communication circuit | ECU POWER SOURCE CIRCUIT |
| 2. Cruise control ECU assembly | CRUISE CONTROL SWITCH CIRCUIT | |
| Cruise control not cancelled, even when brake pedal is depressed. | 1. Cruise control cable | CRUISE CONTROL SWITCH CIRCUIT |
| 2. Stop light switch circuit | STOP LIGHT SWITCH CIRCUIT | |
| 3. Actuator motor circuit | DTC 11 ACTUATOR MOTOR CIRCUIT; DTC 15 ACTUATOR MOTOR CIRCUIT | |
| 4. Cruise control ECU assembly | CRUISE CONTROL SWITCH CIRCUIT | |
| A/T: Cruise control not cancelled, even when transmission is shifted to "N" position. | 1. Cruise control cable | CRUISE CONTROL SWITCH CIRCUIT |
| 2. Park/neutral position switch circuit | DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) | |
| 3. Actuator motor circuit | DTC 11 ACTUATOR MOTOR CIRCUIT; DTC 15 ACTUATOR MOTOR CIRCUIT | |
| 4. Cruise control ECU assembly | CRUISE CONTROL SWITCH CIRCUIT | |
| Control switch does not operate. (SET/COAST, ACC/RES, CANCEL not possible) | 1. Cruise control cable | CRUISE CONTROL SWITCH CIRCUIT |
| 2. Actuator motor circuit | DTC 11 ACTUATOR MOTOR CIRCUIT; DTC 15 ACTUATOR MOTOR CIRCUIT | |
| 3. Cruise control ECU assembly | CRUISE CONTROL SWITCH CIRCUIT | |
| SET possible at 40 km/h (25 mph) or less, or CANCEL does not operate at 40 km/h (25 mph) or less. | 1. Cruise control cable | CRUISE CONTROL SWITCH CIRCUIT |
| 2. Vehicle speed signal abnormal | DTC 21 OPEN VEHICLE SPEED SENSOR CIRCUIT; DTC 23 VEHICLE SPEED SIGNAL ABNORMAL | |
| 3. Actuator motor circuit | DTC 11 ACTUATOR MOTOR CIRCUIT; DTC 15 ACTUATOR MOTOR CIRCUIT | |
| 4. Cruise control ECU assembly | CRUISE CONTROL SWITCH CIRCUIT | |
| Poor response is ACCEL and RESUME modes. | 1. Cruise control cable | CRUISE CONTROL SWITCH CIRCUIT |
| 2. Electronically controlled transmission communication circuit (A/T) | ECU POWER SOURCE CIRCUIT | |
| 3. Actuator motor circuit | DTC 11 ACTUATOR MOTOR CIRCUIT; DTC 15 ACTUATOR MOTOR CIRCUIT | |
| 4. Cruise control ECU assembly | CRUISE CONTROL SWITCH CIRCUIT | |
| A/T: O/D does not RESUME, even though the road is not uphill. | 1. Electronically controlled transmission communication circuit | ECU POWER SOURCE CIRCUIT |
| 2. Cruise control ECU assembly | CRUISE CONTROL SWITCH CIRCUIT | |
| DTC memory is erased. | Cruise control ECU assembly | CRUISE CONTROL SWITCH CIRCUIT |
| DTC is not output, or is output when it should not be. | 1. Diagnosis circuit | DIAGNOSIS CIRCUIT |
| 2. Cruise control ECU assembly | CRUISE CONTROL SWITCH CIRCUIT | |
| Cruise main indicator light remains ON or falls to light up. | 1. Cruise main indicator light circuit | CRUISE MAIN INDICATOR LIGHT CIRCUIT |
| 2. Cruise control ECU assembly | CRUISE CONTROL SWITCH CIRCUIT |