Toyota Yaris: Seat Belt Warning System / How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
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Use the following procedure to troubleshoot the seat belt warning system.
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*: Use the GTS.
PROCEDURE
1. | VEHICLE BROUGHT TO WORKSHOP |
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2. | CUSTOMER PROBLEM ANALYSIS |
(a) Interview the customer to confirm the trouble.
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(a) Measure the auxiliary battery voltage with the ignition switch off.
Standard Voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.
(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.
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4. | CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* |
(a) Using the GTS, check if the CAN communication system is functioning normally.
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Result | Proceed to |
CAN DTCs are not output | A |
CAN DTCs are output | B |
B |
| GO TO CAN COMMUNICATION SYSTEM |
A |
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5. | CHECK COMBINATION METER ASSEMBLY |
(a) Check the operation of the speedometer and shift indicator on the combination meter assembly.
OK:
The speedometer and shift indicator on the combination meter assembly operate normally.
NG |
| GO TO METER / GAUGE SYSTEM |
OK |
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6. | 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 8 |
A |
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7. | OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Data List / Active Test
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(b) Terminals of ECU
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(c) On-vehicle Inspection
Click here
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SYSTEM DESCRIPTION SEAT BELT WARNING SYSTEM DESCRIPTION (a) Seat belt warning light operation for driver seat belt: (1) The seat belt warning light on the combination meter assembly illuminates, blinks or turns off in accordance with the driver seat belt state, vehicle speed, shift lever position and parking brake state...
CUSTOMIZE PARAMETERS CUSTOMIZE SEAT BELT WARNING SYSTEM NOTICE:
When the customer requests a change in a function, first make sure that the function can be customized...
Other information:
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...
INSPECTION PROCEDURE 1. INSPECT HEADLIGHT LEVELING SWITCH (a) Check the voltage. (1) Connect a positive (+) lead from the auxiliary battery to terminal 5 (B) and a negative (-) lead to terminal 2 (E).
*a Component without harness connected (Headlight Leveling Switch) (2) Measure the voltage according to the value(s) in the table below...