How To Proceed With Troubleshooting
SEAT BELT: SEAT BELT WARNING SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING
HINT
* Use this procedure to troubleshoot the seat belt warning system.
* *: Use the Techstream.
1. VEHICLE BROUGHT TO WORKSHOP
NEXT -- Continue to next step.
2. CUSTOMER PROBLEM ANALYSIS
HINT
* In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
* Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
* The following 5 items are important points in the problem analysis:
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3. INSPECT BATTERY VOLTAGE
(a) Measure the battery voltage.
Standard Voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.
NEXT -- Continue to next step.
4. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM
(a) Use the Techstream to check if the CAN communication system is functioning normally Diagnosis System.
Result:
B -- GO TO CAN COMMUNICATION SYSTEM Diagnosis System
A -- Continue to next step.
5. CHECK COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM
(a) Use the Techstream to check if the multiplex communication system is functioning normally Multiplex Communication System.
Result:
B -- GO TO MULTIPLEX COMMUNICATION SYSTEM Multiplex Communication System
A -- Continue to next step.
6. CHECK FOR DTC (AIRBAG SYSTEM)
(a) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.
(b) Recheck for DTCs.
Result:
B -- GO TO STEP 8
C -- GO TO AIRBAG SYSTEM Airbag System
A -- Continue to next step.
7. CHECK FOR DTC (OCCUPANT CLASSIFICATION SYSTEM)
(a) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.
(b) Recheck for DTCs.
Result:
B -- GO TO OCCUPANT CLASSIFICATION SYSTEM Occupant Classification System
A -- Continue to next step.
8. PROBLEM SYMPTOMS TABLE
(a) Refer to the Problem Symptoms Table Problem Symptoms Table.
Result:
B -- GO TO STEP 10
A -- Continue to next step.
9. OVERALL ANALYSIS AND TROUBLESHOOTING*
(a) Data List / Active Test Scan Tool Testing and Procedures.
(b) Terminals of ECU Pinout Values and Diagnostic Parameters.
(c) On-vehicle Inspection Component Tests and General Diagnostics.
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10. REPAIR OR REPLACE
NEXT -- Continue to next step.
11. CONFIRMATION TEST
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