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- Steering wheel sensor contains the power supply circuit
for Steering wheel sensor. The power is supplied from the ETACS-ECU (IG11 terminal). The power
is supplied from the fusible link.
- When malfunction occurs in steering wheel sensor power supply, the communication
with M.U.T.-III becomes unavailable.
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- Damaged wiring harness and connectors
- Fusible link malfunction
- Improper tightening of battery terminal
- Battery failure
- Charging system failed
- Steering wheel sensor malfunction
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Check if diagnosis code is set to the ETACS-ECU.
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Q.
Is the diagnosis code set?
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Troubleshoot the ETACS. Refer to GROUP 54A - ETACS .
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Resistance between the steering wheel sensor connector (earth terminal) and the
body earth OK: Continuity exists (2 Ω or less)
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Q.
Is the check result normal?
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Q.
Is the check result normal?
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Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use
Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
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Repair the connector(s) or wiring harness. Then go to Step 6.
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Q.
Is the check result normal?
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Repair the connector(s) or wiring harness. Then go to Step 6.
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Q.
Is the communication with M.U.T.-III possible?
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Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/How
to Cope with Intermittent Malfunctions ).
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Replace the steering wheel sensor (Refer to ).
Then go to Step 6.
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Q.
Is the communication with M.U.T.-III possible?
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This diagnosis is complete.
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