AIRBAG SYSTEM > Diagnosis Circuit |
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DESCRIPTION
DTC output mode is set by connecting terminals TC and CG of the DLC3.DTCs are displayed by blinking of the SRS warning light.
- HINT:
- When each warning light stays blinking, a ground short in the wiring of terminal TC of the DLC3 or an internal ground short in each ECU is suspected.
- A DTC output mode signal is transmitted through the CAN communication system to each ECU including the center airbag sensor. When all systems do not enter DTC output mode, there may be an ECM malfunction.
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work (Click here).
- When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected (Click here).
1.CHECK CAN COMMUNICATION SYSTEM |
Check if a CAN communication system DTC is output (Click here).
Result Result Proceed to DTC is output A DTC is not output B
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B | |
2.CHECK HARNESS AND CONNECTOR (DLC3 - ECM) |
Turn the ignition switch OFF.
Disconnect the A24 ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection Condition Specified Condition J17-13 (TC) - A24-16 (TC) Always Below 1 Ω
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OK | |
3.CHECK HARNESS AND CONNECTOR (DLC3 - BODY GROUND) |
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection Condition Specified Condition J17-4 (CG) - Body ground Always Below 1 Ω
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OK | |
4.CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND) |
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection Condition Specified Condition A24-16 (TC) - Body ground Always 1 MΩ or higher
Result Result Proceed to NG A OK (for 1GR-FE) B OK (for 1UR-FE) C OK (for 3UR-FE) D OK (for 3UR-FBE) E
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E | ||
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