Diagnosis Item 7: Diagnose when the M.U.T.-III cannot receive the data sent by steering wheel sensor

caution

When servicing a CAN bus line, earth yourself by touching a metal object such as an unpainted water pipe. If you fail to do, a component connected to the CAN bus line may be broken.

FUNCTION

If the M.U.T.-III can not communicate with the steering wheel sensor, this diagnosis result will be set.

TRUBLE JUDGEMENT CONDITIONS

If a communication flag is not set for the steering wheel sensor, the ETACS-ECU determines that there is a failure.

TROUBLESHOOTING HINTS

Malfunction of the connector [joint connector (CAN2) or steering wheel sensor connector improperly connected]
Malfunction of the wiring harness [open circuit between the steering wheel sensor and the joint connector (CAN2), power supply circuit to the steering wheel sensor]
Faulty steering wheel sensor

DIAGNOSIS PROCEDURE

STEP 1. Connector check: C-04 joint connector (CAN2) and C-209 steering wheel sensor connector

caution

The strand end of the twist wire should be within 10 cm from the connector. For details refer to

Q. Is the check result normal?

	Go to Step 2.

	Repair the defective connector.

STEP 2. Check the wiring harness between C-209 steering wheel sensor connector and C-04 joint connector (CAN2)

caution

Strictly observe the specified wiring harness repair procedure. For details refer to

Disconnect steering wheel sensor connector and joint connector (CAN2), and following wiring harness.

The wiring harness between C-209 steering wheel sensor connector terminal No.3 and C-105 joint connector (CAN2) terminal No.4 <CAN_H>
The wiring harness between C-209 steering wheel sensor connector terminal No.4 and C-04 joint connector (CAN2) terminal No.15 <CAN_L>

Q. Is the check result normal?

	Check the power supply circuit of the steering wheel sensor. Refer to Group 35C - Troubleshooting .

	Repair the wiring harness.