Tech Tips
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | Link |
|---|---|---|
| Stop and start system does not operate | Stop and start system operation prohibition based on the battery conditions (Refer to "Stop and Start System does not Operate (Battery Condition)") | |
| Engine hood courtesy switch circuit | ||
| Driver door courtesy switch circuit (system prohibits control) | ||
| Driver door courtesy switch circuit (CAN communication DTC U0140) | ||
| Driver door courtesy switch circuit | ||
| Driver seat belt buckle switch circuit (system prohibits control) | ||
| Driver seat belt buckle switch circuit (CAN communication DTC U0140) | ||
| Front seat inner belt assembly (for driver side) (w/ Occupant Classification System) | ||
| Front seat inner belt assembly (for driver side) (w/o Occupant Classification System) | ||
| Air conditioning system (system prohibits control) | ||
| Air conditioning system (for Automatic Air Conditioning System) | ||
| Air conditioning system (for Manual Air Conditioning System) | ||
| Brake booster vacuum is low (system prohibits control) | ||
| Brake booster vacuum is low | ||
| Backup boost converter circuit | ||
| Neutral position switch circuit | ||
| Starter signal circuit | ||
| STA signal circuit | ||
| Starter inrush current reduction relay circuit (for CVT) | ||
| Crank position sensor | ||
| ECM | ||
| Relay | - | |
| Vacuum sensor assembly | ||
| Brake booster assembly (for LHD) | ||
| Brake booster assembly (for RHD) | ||
| Oil pump assembly with motor (continuously variable transaxle assembly) (for CVT) | ||
| Starter assembly | ||
| The deceleration sensor 0 point calibration is performed | ||
| Deceleration sensor (airbag sensor assembly) | ||
| Skid control ECU (brake actuator assembly) | ||
| CAN communication system (for LHD with Central Gateway ECU) | ||
| CAN communication system (for LHD without Central Gateway ECU) | ||
| CAN communication system (for RHD with Central Gateway ECU) | ||
| CAN communication system (for RHD without Central Gateway ECU) | ||
| Engine stop and start ECU | ||
| Battery*1 | ||
| Wire harness or connector | - | |
| Starter assembly does not operate | Battery | |
| Starter assembly | ||
| Park/neutral position switch assembly (for CVT) | ||
| Neutral position switch (for Manual Transaxle) | ||
| Entry and start system (for start function) (w/ Entry and Start System) | ||
| SFI system | ||
| Starter signal circuit | ||
| Cranking speed decreases | Battery | |
| Starter inrush current reduction relay circuit (for CVT) | ||
| Starter assembly | ||
| Stop and start cancel indicator light does not operate | Combination meter assembly | |
| Indicator circuit (CAN communication system) | ||
| Engine stop and start ECU | ||
| Stop and start indicator light does not operate | Combination meter assembly | |
| Indicator circuit (CAN communication system) | ||
| Engine stop and start ECU | ||
| Stop and start control cannot be canceled | ECAN terminal voltage | |
| Stop and start cancel switch circuit | ||
| Engine not stopped by stop and start control (stop and start operation prohibited) | Engine hood courtesy switch circuit | |
| Driver side door courtesy switch circuit | ||
| Stop light switch assembly | ||
| Clutch start switch assembly (for lower) (for Manual Transaxle) | ||
| Clutch start switch assembly (for upper) (for Manual Transaxle) | ||
| Engine stop and start ECU | ||
| The shift lever is operated without depressing the clutch pedal (system operation prohibition) (for Manual Transaxle) | ||
| Multi-information display screen does not change after pressing steering pad switch assembly. | Stop and start priority control system | |
| Multi-information display screen changes without pressing steering pad switch assembly. | Stop and start priority control system | |
| Multi-information display screen does not change but control mode changes. | Stop and start priority control system | |
| Multi-information display screen changes but control mode does not change. | Stop and start priority control system | |
| An interruption message is not displayed on the multi-information display when the eco run cancel switch assembly is pressing and holding. | Stop and start priority control system | |
| The control mode changes but an interruption message is not displayed on the multi-information display. | Stop and start priority control system | |
| The control mode does not change but an interruption message is displayed on the multi-information display. | Stop and start priority control system | |
| Control mode returns to default mode after turning ignition switch to ON | Stop and start priority control system |
*1: If the vehicle has not been used for a long time, the battery charge will be low and stop and start control operation will be prohibited. In this case, recharge the battery, initialize the integrated current value* and drive the vehicle approximately 5 to 40 minutes until stop and start control operation is permitted.
*: Use the GTS to perform Integrated Current Value Initialization.
Tech Tips
If the Data List item "Integrated Current" is 0 or higher, it is not necessary to perform initialization.