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Use M.U.T.-III to diagnose the CAN bus lines.
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Q.
Is the check result normal?
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Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ).
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(1)Connect the negative battery terminal.
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(2)After erasing the diagnosis code memory, check the diagnosis code again.
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(3)Disconnect the negative battery terminal.
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Q.
Is the diagnosis code No. B1648 set?
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Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection
Service Points - How to Cope with Intermittent Malfunction ).
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It is checked whether passenger’s air bag ON indicator lamp is normal (Refer
to ).
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Q.
Is the check result normal?
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Replace hazard indicator assembly (Refer to GROUP 52A - Instrument Panel
Assembly ).
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(1)Check that the negative battery terminal is disconnected. If the negative battery
terminal is connected, disconnect it.
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(2)While pushing the part "A" indicated in the figure of the harness side connector, turn
the lock lever to the direction of the arrow to release the lock lever, and disconnect the SRS-ECU
connector. (3)Disconnect the hazard indicator assembly connector. (4)Take the measurements below at the SRS-ECU and hazard indicator assembly wiring
harness side connectors.
- Continuity ONLP line between SRS-ECU connector and hazard
indicator assembly connector
OK: Continuity (less than 2 Ω)
Q.
Is the check result normal?
Go to Step 5.
Repair the wiring harnesses ONLP line between the SRS-ECU connector and the hazard
indicator assembly connector.
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(1)Disconnect the hazard indicator assembly connector.
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(2)Connect the negative battery terminal.
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(4)Measure the voltage between the hazard indicator assembly harness side connector
and the body earth. OK: System voltage
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Q.
Is the check result normal?
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Repair the wiring harness IG+ line between the ETACS-ECU connector and
the hazard indicator assembly connector.
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Q.
Is the diagnosis code No. B1648 set?
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Replace SRS-ECU (Refer to ).
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Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection
Service Points - How to Cope with Intermittent Malfunction ).
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