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- Confirm the vehicle status or the ambient conditions to check whether the
auto stop should be carried out or not (Refer to ).
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Q.
Are the conditions for prohibiting the auto stop satisfied?
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Confirm the diagnosis code is set from the following ECU.
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- AS&G-ECU
- Engine-ECU
- CVT-ECU
- ASC-ECU
- Combination meter
- EPS-ECU
- A/C-ECU
- ETACS-ECU
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Q.
Is the diagnosis code set?
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YES <Diagnosis code is set from the AS&G-ECU> : Perform the troubleshooting of the AS&G-ECU (Refer to ).
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YES <Diagnosis code is set from the engine-ECU> : Perform the troubleshooting of the engine-ECU (Refer to GROUP 13C - Troubleshooting - Inspection
Chart for Diagnosis Code ).
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YES <Diagnosis code is set from the CVT-ECU> : Perform the troubleshooting of the CVT-ECU (Refer to GROUP 23A - Troubleshooting - Diagnosis
Code Chart ).
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YES <Diagnosis code is set from the ASC-ECU> : Perform the troubleshooting of the ASC-ECU (Refer to GROUP 35C - Troubleshooting - Diagnosis
Code Chart ).
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YES <Diagnosis code is set from the combination meter> : Perform the troubleshooting of the combination meter (Refer to GROUP 54A - Combination
Meter - Diagnosis Code Chart ).
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YES <Diagnosis code is set from the EPS-ECU> : Perform the troubleshooting of the EPS-ECU (Refer to GROUP 37 - Troubleshooting - Diagnosis
Code Chart ).
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YES <Diagnosis code is set from the A/C-ECU> : Perform the troubleshooting of the A/C-ECU (Refer to GROUP 55 - Troubleshooting - Diagnosis
Code Chart ).
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YES <Diagnosis code is set from the ETACS-ECU> : Perform the troubleshooting of the ETACS-ECU (Refer to GROUP 54A - ETACS - Diagnosis
Code Chart ).
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- Item 11: ENG ECU AS&G system failure
- Item 38: T/M ECU AS&G system failure
- Item 39: ASC ECU AS&G system failure
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OK: OFF (Ignition switch: ON)
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Q.
Is the check result normal?
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NO <The display status "ON" to item 11> : Perform the troubleshooting of the engine-ECU (Refer to GROUP 13C - Troubleshooting - Inspection
Chart for Diagnosis Code ).
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NO <The display status "ON" to item 38> : Perform the troubleshooting of the CVT-ECU.
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NO <The display status "ON" to item 39> : Perform the troubleshooting of the ASC-ECU.
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- Item 12: Idle Stop enable (A/C ECU)
- Item 13: Idle Stop enable (ENG ECU)
- Item 36: Idle Stop enable (T/M ECU)
- Item 37: Idle Stop enable (ASC ECU)
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OK: The display status "Enable"
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Q.
Is the check result normal?
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NO <"Disable" is displayed in item 12.> : It is estimated to be the output of the automatic stop prohibition signal of A/C-ECU.
Recheck the auto stop prohibition signal of A/C ECU.
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NO <"Disable" is displayed in item 13.> : It is estimated to be the output of the automatic stop prohibition signal of engine-ECU.
Go to Step 15.
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NO <"Disable" is displayed in item 36.> : It is estimated to be the output of the automatic stop prohibition signal of CVT-ECU.
Perform the troubleshooting of the CVT-ECU (Refer to GROUP 23A - Troubleshooting - Diagnosis
Code Chart ).
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NO <"Disable" is displayed in item 37.> : It is estimated to be the output of the automatic stop prohibition signal of ASC-ECU.
Go to Step 5.
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Q.
Is the check result normal?
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Replace the hydraulic unit (integrated with ASC-ECU).
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OK:
Close (Hood: Closed) Open (Hood: Opened)
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Q.
Is the check result normal?
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Perform the troubleshooting of the engine hood latch switch circuit (Refer to
GROUP 54A - ETACS - Input Signal Procedures - The Hood Latch Switch
Signal is not Sent to The ETACS-ECU ).
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- Item 15: Ambient temperature
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OK: At ambient temperature (atmospheric temperature) or equivalent
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Q.
Is the check result normal?
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Perform the troubleshooting of the ambient temperature sensor (Refer to GROUP 55 - Troubleshooting - Symptom
Chart ).
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- Refer to Data List Reference Table .
- Item 30: Brake lamp SW
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Q.
Is the check result normal?
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- Check the data lists of the ETACS-ECU (Refer to GROUP 54A - Troubleshooting - Data
List Reference Table ).
- Item 290: Stop lamp switch
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OK: ON (Depress the brake pedal), OFF (Release the brake pedal)
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Q.
Is the check result normal?
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Check the stop lamp switch (Refer to GROUP 35A - Brake pedal - Stop
Lamp Switch Check ).
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Q.
Is the check result normal?
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Check the abnormality of relevant stop lamp switch circuit.
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Replace the AS&G OFF switch.
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- Item 35: Driver’s side door SW
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OK:
Open (Driver’s side door: Opened) Close (Driver’s side door: Closed)
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Q.
Is the check result normal?
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Perform the troubleshooting of the driver’s side door switch circuit
(Refer to GROUP 54A - ETACS - Input Signal Procedures - The Front
Door Switch (RH) Signal is not Sent to The ETACS-ECU ).
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- Item 10: Seat belt fasten status
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OK:
Fastened (Driver’s seat belt: Fastened) Not fastened (Driver’s seat belt: Not fastened)
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Q.
Is the check result normal?
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Check the relevant to the seat belt in accordance with "Check Procedure for Each
Multi Information Display Screen" of the combinations meter (Refer to GROUP 54A - Combination
Meter - Symptom Procedures - Check Procedure for Each Multi Information Display Screen ).
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- Refer to Data List Reference Table .
- Item 29: Parking brake SW
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Q.
Is the check result normal?
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Check the relevant to the parking brake switch in accordance with "Check Procedure
for Each Multi Information Display Screen" of the combinations meter (Refer to GROUP 54A - Combination
Meter - Symptom Procedures - Check Procedure for Each Multi Information Display
Screen ).
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- Check the data lists of the ASC-ECU (Refer to GROUP 35C - Troubleshooting - Data
List Reference Table).
- Item 10: Master cylinder pressure
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Q.
Is the check result normal?
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Perform the troubleshooting of the ASC-ECU (Refer to GROUP 35C - Troubleshooting - Diagnosis
Code Chart ).
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- Refer to Data List Reference Table .
- Item 17: Vehicle speed
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Q.
Is the check result normal?
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Perform the troubleshooting of the ASC-ECU (Refer to GROUP 35C - Troubleshooting - Diagnosis
Code Chart ).
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- Refer to Data List Reference Table .
- Item 44: Yaw rate sensor
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Q.
Is the check result normal?
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Perform the troubleshooting of the ASC-ECU (Refer to GROUP 35C - Troubleshooting - Diagnosis
Code Chart ).
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- Refer to Data List Reference Table .
- Item 18: Accelerator pedal position
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Q.
Is the check result normal?
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Perform the troubleshooting of the accelerator pedal position sensor (Refer to
GROUP 13C - Troubleshooting - Diagnosis Code Chart ).
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- Refer to Data List Reference Table .
- Item 45: Brake booster pressure
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Q.
Is the check result normal?
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Perform the troubleshooting of the engine-ECU (Refer to GROUP 13C - Troubleshooting - Diagnosis
Code Chart ).
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- Check the data lists of the engine-ECU (Refer to GROUP 13C - Troubleshooting - Data
List Reference Table ).
- Item 6: Engine coolant temperature sensor
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OK:
Engine cold state: At ambient temperature (atmospheric temperature) or equivalent. Engine hot state: At 80 - 120°C
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Q.
Is the check result normal?
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Perform the troubleshooting of the engine coolant temperature sensor (Refer to
GROUP 13C - Troubleshooting - Diagnosis Code Chart ).
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- Check the data lists of the engine-ECU (Refer to GROUP 13C - Troubleshooting - Data
List Reference Table ).
- Item 160: Battery temperature
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Q.
Is the check result normal?
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Perform the troubleshooting of the engine coolant temperature sensor (Refer to
GROUP 13C - Troubleshooting - Diagnosis Code Chart ).
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- Check the following items.
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- After a malfunction occurs, the negative (-)
cable is disconnected from the battery once.
- After a malfunction occurs, the connector is disconnected from the engine-ECU once.
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Q.
Is any of the items above true?
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- Disconnect the negative (-) cable from the
battery (this can delete backup data).
- Charge the battery (Refer to GROUP 54A - Battery - On-vehicle
Service - Charging ).
- As soon as the battery is charged, leave the engine idling and turn off lamps and
all accessories.
- Check the data lists of the engine-ECU (Refer to GROUP 13C - Troubleshooting - Data
List Reference Table ).
- Item No. 165: Charging battery mode flag
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OK: The display status "ON" is changed to "OFF" within approximately 10 minutes.
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Q.
Is the check result normal?
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Turn the ignition switch to "ON" position after stopping the engine. Then go to
Step 24.
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- Turn the ignition switch to "ON" position (But do
not start the engine).
- Check the data lists of the engine-ECU (Refer to GROUP 13C - Troubleshooting - Data
List Reference Table ).
- Item No. 169: Vehicle Consumption Current
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OK: When the headlamp is lit, the numerical value should increase.
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Q.
Is the check result normal?
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Replace the battery current sensor.
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1. Turn the ignition switch to "ON" position (But
do not start the engine). 2. Check the data lists of the engine-ECU (Refer to GROUP 13C - Troubleshooting - Data
List Reference Table ) and adjust the electrical load so
that the displayed value should be 30 ± 2 A.
- Item No. 169: Vehicle Consumption Current
3. Continue the conditions of Step 2 for 120 seconds and discharge the battery. 4. Run the engine for 10 seconds after the engine start and check on the battery
deterioration with data lists of the engine-ECU.
- Item No. 152: Check battery flag
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OK: OFF (Engine: Idle operation)
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5. After checking that the data list item No. 152
of the engine-ECU is displayed, swiftly turn the ignition switch to "LOCK" (OFF) position and
leave it for 10 seconds. 6. Repeat Steps 1-5 four times. Check that data list item No. 152 always shows "OFF".
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Q.
Is the check result normal?
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Recharge the battery because the battery is discharged during the check. (Refer
to GROUP 54A - Battery - On-vehicle Service - Battery Charging ).
After the battery is charged, go to Step 25.
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Q.
Does the trouble symptom persist?
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Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection
Service Points - How to Cope with Intermittent Malfunctions ).
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