Toyota Yaris: Stop And Start System / How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
*: Use the GTS.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
|
| 2. | CUSTOMER PROBLEM ANALYSIS |
|
| 3. | PRE-CHECK |
(a) Measure the auxiliary battery voltage.
Standard voltage:
11 to 14 V (ignition switch off)
If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.
HINT:
-
If the auxiliary battery voltage is less than 11 V, recharge or replace the auxiliary battery. If the integrated current value does not exceed the threshold*1 even though the auxiliary battery has been replaced or charged until the charging current decreases to 5 A or less, perform an integrated current value initialization*2 and drive the vehicle for approximately 5 to 40 minutes until the stop and start system operates.
-
*1: Refer to System Description for details on the integrated current threshold.
Click here
-
*2: Use the GTS to perform Integrated Current Value Initialization.
Click here
-
*1: Refer to System Description for details on the integrated current threshold.
- When replacing the auxiliary battery, even if the stop and start system operates directly after performing integrated current value initialization, operation of the stop and start system may be prohibited at certain times over the next few trips while auxiliary battery charge learning is performed.
(b) Check the fuses and relays.
(c) Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.
|
| 4. | CHECK DTC AND FREEZE FRAME DATA* |
(a) Check for DTCs.
Powertrain > Stop and Start > Trouble Codes(b) Check for freeze frame data.
HINT:
Record or print DTCs and freeze frame data if necessary.
(c) Clear the DTCs and freeze frame data.
Powertrain > Stop and Start > Clear DTCs(d) Recheck for DTCs.
Powertrain > Stop and Start > Trouble CodesHINT:
If any DTCs for the CAN communication system are output, troubleshoot those DTCs first.
| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTCs are output | B |
| Malfunction cannot be duplicated and DTCs are not output | C |
| B |
 | GO TO DIAGNOSTIC TROUBLE CODE CHART |
| C |
 | USE SIMULATION METHOD TO CHECK |
|
| 5. | REFER TO PROBLEM SYMPTOMS TABLE |
(a) Refer to Problem Symptoms Table.
Click here
| Result | Proceed to |
|---|---|
| Fault is not listed in problem symptoms table | A |
| Fault is listed in problem symptoms table | B |
| B |
 | GO TO STEP 7 |
|
| 6. | OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Data List / Active Test
Click here
(b) Terminals of ECU
Click here
|
| 7. | REPAIR OR REPLACE |
|
| 8. | CONFIRMATION TEST |
(a) Warm up the engine.
(b) Turn the air conditioning system off.
(c) Drive the vehicle for 5 to 40 minutes.
CAUTION:
When performing Confirmation Driving Pattern, obey all speed limits and traffic laws.
(d) Stop the vehicle and confirm that the engine is stopped by stop and start control when all of the following conditions are met:
- Steering wheel centered
- Shift lever to neutral and release the clutch pedal
- Stop and start indicator illuminated
HINT:
If the engine is not stopped by stop and start control, air fuel ratio learning and idle speed learning are necessary. Allow the engine to idle for 3 minutes and check that the engine idle speed is within 50 rpm of the target idle speed.
(e) Depress the clutch pedal and check that the engine restarts.
| NEXT |
 | END |
System Description
SYSTEM DESCRIPTION STOP AND START CONTROL The stop and start system operates according to the following conditions, achieving appropriate engine stop and start control together with safe and smooth driving characteristics...
Operation Check
OPERATION CHECK STOP AND START SYSTEM OPERATION CHECK HINT:
If the cable is disconnected from the battery terminal, stop and start control is prohibited until refresh charge is completed...
Other information:
Toyota Yaris XP210 (2020-2026) Reapir and Service Manual: Diagnosis System
DIAGNOSIS SYSTEM FUNCTION OF WARNING INDICATOR AND MESSAGE (a) If the pre-collision system is not functioning properly, the driver is warned by the PCS warning light and a warning message is displayed on the multi-information display. Warning Message Detail DTC/RoB PCS warning light "Pre-Collision System Malfunction Visit Your Dealer" Pre-collision system malfunctioning Stored Illuminates "Pre-Collision System Radar In Self Calibration Unavailable See Owner's Manual" Millimeter wave radar sensor assembly misaligned Stored Illuminates "Pre-Collision System Out of Temperature Range Unavailable See Owner's Manual" Millimeter wave radar sensor assembly temperature malfunction Stored Illuminates "Pre-Collision System Unavailable See Owner's Manual" Millimeter wave radar sensor assembly voltage malfunction Determination was made for temporary suspension of system operation due to millimeter wave radar sensor assembly detecting interference from other nearby radar emitters Stored Illuminates "Pre-Collision System Radar Sensor Blocked Unavailable Clean Radar Sensor" Foreign matter attached to millimeter wave radar sensor assembly Stored Illuminates "Front Camera Unavailable See Owner's Manual" Abnormal forward recognition camera voltage Stored Illuminates "Front Camera Out of Temperature Range Unavailable Wait until Normal Temperature" Forward recognition camera temperature outside of operational range Stored Illuminates "Front Camera Low Visibility Unavailable See Owner's Manual" Foreign matter attached to forward recognition camera or area of windshield in front of forward recognition camera Forward recognition camera or area of windshield in front of forward recognition camera is fogged up Stored Illuminates "VSC Turned Off Pre-Collision Brake System Unavailable" VSC system is disabled Not stored Illuminates PCS Warning Light Illumination Status PCS Warning Light Condition Illuminates Pre-collision system malfunctioning Pre-collision system temporarily disabled During pre-collision system radar alignment Pre-collision system disabled VSC system disabled Not illuminated Other INITIAL CHECK (a) An initial check is performed when the ignition switch is off for more than 2 seconds and then turned ON...
Toyota Yaris XP210 (2020-2026) Reapir and Service Manual: Front Door Courtesy Switch Circuit
DESCRIPTION The main body ECU (multiplex network body ECU) detects the condition of the front door courtesy light switch assembly. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Before replacing the main body ECU (multiplex network body ECU), refer to Registration...
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Fuel Gauge
The fuel gauge shows approximately how much fuel is remaining in the tank when the ignition is switched ON. We recommend keeping the tank over 1/4 full.
