Inspection Procedure 5: The blind spot warning lamp does not operate as a pre-check function when you turn the ignition switch ON.


COMMENTS ON TROUBLE SYMPTOM


If the blind spot warning lamp is not activated as a pre-check when you turn on the ignition switch, the door mirror assembly or the clearance warning control unit may have a problem.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. Check the trouble symptom.


Check how the blind spot warning lamps illuminate.
(1)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(2)Check which blind spot warning lamp does not illuminate.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).

Take a note which side fails, and then go to Step 2.

STEP 2. Voltage measurement at door mirror assembly connectors (INDL and INDR terminals).


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3)Measure the voltage at the failure side.
..... When the left side fails, check the voltage between the door mirror assembly (LH) connector (INDL terminal) and body earth.
When the actuator test (Item No.2) is executed
OK: System voltage
When the actuator test (Item No.2) is aborted
OK: 1 V or less
 ..... When the right side fails, check the voltage between the door mirror assembly (RH) connector (INDR terminal) and body earth.
When the actuator test (Item No.2) is executed
OK: System voltage
When the actuator test (Item No.2) is aborted
OK: 1 V or less

Q. Is the check result normal?

Go to Step 4.

Go to Step 3.

STEP 3. Check of short to power supply, short to earth, and open circuit in INDL or INDR line between the door mirror assembly (LH or RH) connector and clearance warning control unit connector.


Q. Is the check result normal?

Replace the clearance warning control unit (Refer to ).

Repair the connector(s) or wiring harness.

STEP 4. Check of open circuit in earth line between the door mirror assembly (LH or RH) connector and body earth.


Q. Is the check result normal?

Go to Step 5.

Repair the connector(s) or wiring harness.

STEP 5. Check the blind spot warning lamp.


Refer to GROUP 51 - Door Mirror .

Q. Is the check result normal?

Go to Step 6.

Replace the door mirror assembly (Refer to GROUP 51 - Door Mirror ).

STEP 6. Retest the system


Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).

Replace the clearance warning control unit (Refer to ).