Door Courtesy Switch Circuit

LIGHTING: LIGHTING SYSTEM: Door Courtesy Switch Circuit
- Door Courtesy Switch Circuit

DESCRIPTION

The main body ECU detects the condition of the door courtesy light switches.

HINT
* The main body ECU receives door courtesy light switch signals to control the illuminated entry system.
* When performing troubleshooting, inspect the switch that is related to the malfunction only. For example, if the illuminated entry system does not operate when opening the front passenger side door with the ignition switch off, inspect the front passenger side door courtesy light switch circuit only.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (DOOR COURTESY SW)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) According to the display on the Techstream, read the Data List.

Main Body





OK:

Normal conditions listed above are displayed.

Result





D -- INSPECT BACK DOOR LOCK ASSEMBLY

C -- INSPECT REAR DOOR COURTESY LIGHT SWITCH

B -- INSPECT FRONT DOOR COURTESY LIGHT SWITCH

A -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures

2. INSPECT FRONT DOOR COURTESY LIGHT SWITCH

(a) Remove the front door courtesy light switch Removal.





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





Text in Illustration





NG -- REPLACE FRONT DOOR COURTESY LIGHT SWITCH Removal
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH - MAIN BODY ECU)

(a) Disconnect the H1 front door courtesy light switch LH connector.

(b) Disconnect the I1 front door courtesy light switch RH connector.

(c) Disconnect the 2A or 2E main body ECU connector.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

LH Side





RH Side





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU

4. INSPECT REAR DOOR COURTESY LIGHT SWITCH

(a) Remove the rear door courtesy light switch Removal.





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





Text in Illustration





NG -- REPLACE REAR DOOR COURTESY LIGHT SWITCH Removal
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (REAR DOOR COURTESY LIGHT SWITCH - MAIN BODY ECU)

(a) Disconnect the H3 rear door courtesy light switch LH connector.

(b) Disconnect the I3 rear door courtesy light switch RH connector.

(c) Disconnect the 2E or C45 main body ECU connector.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

LH Side





RH Side





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU

6. INSPECT BACK DOOR LOCK ASSEMBLY

(a) Remove the back door lock assembly Disassembly.





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





Text in Illustration





NG -- REPLACE BACK DOOR LOCK ASSEMBLY Disassembly
OK -- Continue to next step.

7. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - MAIN BODY ECU AND BODY GROUND)

(a) Disconnect the L3 back door lock assembly connector.

(b) Disconnect the 2A main body ECU connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU