DTC B110E[A3] RLS(Rain and Light Sensor) Circuit System Voltage High (BCM)

1. Body control system check

Refer to "64.Body Control 10I.Troubleshooting(BCM) diagnostic system check-body controls".

2. Current DTC check

1) Connect the scan tool.

2) Turn OFF the ignition switch.

3) Turn ON the ignition switch.

4) Observe the DTC information with a scan tool. Is a DTC set?

Yes

=>Go to Rain and light sensor ignition voltage check.

No

Go to Intermittent conditions of body control system.

Refer to "223.Body Control 36D.Symptom(BCM) intermittent conditions of body control system".

3. Rain and light sensor ignition voltage check

1) Turn OFF the ignition switch.

2) Disconnect the rain and light sensor harness connector (L4).

3) Turn ON the ignition switch.

4) Measure the voltage between the rain and light sensor ignition power supply circuit (pin 3 of L4) and the body ground using a DMM. Is the voltage less than or equal to the specified value?

Value: 16.0 V

Refer to "LHD Body Control" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Body Control (4JJ3 with DPD)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Body Control (4JJ3 without DPD, RZ4E)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Yes

=>Go to Rain and light sensor ground inspection.

No

=>Go to Charging system inspection.

4. Charging system inspection

1) Inspect the charging system. Is the result normal?

Refer to "202.Engine 15C.Functional Inspection(4JJ3 with DPD) charging system check".

Refer to "202.Engine 15C.Functional Inspection(4JJ3 without DPD) charging system check".

Refer to "202.Engine 15C.Functional Inspection(RZ4E-TC) charging system check".

Yes

=>Go to BCM ground inspection.

No

Repair the charging system.

=>Go to Repair verification.

5. BCM ground inspection

1) Inspect the BCM ground section for corrosion or improper installation. Is the result normal?

Refer to "LHD Body Control" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Body Control (4JJ3 with DPD)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Body Control (4JJ3 without DPD, RZ4E)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Yes

=>Go to BCM replacement.

No

Repair the ground point as necessary.

=>Go to Repair verification.

6. Rain and light sensor ground inspection

1) Inspect the rain and light sensor ground section for corrosion or improper installation. Is the result normal?

Refer to "LHD Body Control" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Body Control (4JJ3 with DPD)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Body Control (4JJ3 without DPD, RZ4E)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Yes

Replace the rain and light sensor.

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control rain and light sensor removal".

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control rain and light sensor installation".

=>Go to Repair verification.

No

Repair the ground point as necessary.

=>Go to Repair verification.

7. BCM replacement

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control BCM removal".

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control BCM installation".

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control BCM setting".

Procedure completion

=>Go to Repair verification.

8. Repair verification

1) Clear the DTC with a scan tool.

2) Turn OFF the ignition switch for 30 seconds or more.

3) Turn ON the ignition switch.

4) Observe the DTC information with a scan tool.