Problem Symptoms Table
PROBLEM SYMPTOMS CHART
| Symptom | Suspected Area | See |
|---|---|---|
| Main switch cannot be turned ON. (CRUISE main indicator light on combination meter does not illuminate.) | 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. (CRUISE main indicator light on combination meter illuminates when main switch is turned ON, but turns off when operating SET function.) | 1. Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| 2. ECM | TERMINALS OF ECU | |
| Vehicle speed setting cannot be done. (CRUISE main indicator light on combination meter illuminates when main switch is turned ON, and remains illuminated when operating SET function.) | 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 (for AA80E) | MONITOR DESCRIPTION | |
| 3. Park / neutral position switch circuit (for A760E) | DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) | |
| 3. Park / neutral position switch circuit (for A760H) | DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) > | |
| 4. Transmission control switch circuit (for AA80E) | AUTOMATIC TRANSMISSION UNIT | |
| 4. Transmission control switch circuit (for A760E) | TRANSMISSION CONTROL SWITCH CIRCUIT | |
| 4. Transmission control switch circuit (for A760H) | TRANSMISSION CONTROL SWITCH CIRCUIT | |
| 5. Combination meter system | HOW TO PROCEED WITH TROUBLESHOOTING | |
| 6. ECM | TERMINALS OF ECU | |
| While the vehicle is driving with cruise control, the set control is canceled. (CRUISE main indicator light remains illuminated.) | 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 "A" Intermittent / Erratic / High | |
| 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 (for AA80E) | MONITOR DESCRIPTION | |
| 5. Park / neutral position switch circuit (for A760E) | DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT) | |
| 5. Park / neutral position switch circuit (for A760H) | DTC 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 "A" Intermittent / Erratic / High |
| 2. ECM | TERMINALS OF ECU | |
| Vehicle speed setting cannot be canceled. (When Coast, Acceleration, Resume, Set speed change are operated.) | 1. Cruise control switch circuit | CRUISE CONTROL SWITCH CIRCUIT |
| 2. ECM | TERMINALS OF ECU | |
| DTC is not output, or is output when it should not be. | 1. TC and CG terminal circuit | TC AND CG TERMINAL CIRCUIT |
| 2. ECM | TERMINALS OF ECU | |
| CRUISE main indicator light 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 | |
| 4. Combination meter | - |