Door Courtesy Switch Circuit
LIGHTING (INT): LIGHTING SYSTEM: Door Courtesy Switch Circuit
- Door Courtesy Switch Circuit
DESCRIPTION
The main body ECU (multiplex network body ECU) detects the condition of each door courtesy light switch.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. READ VALUE USING TECHSTREAM
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Data List.
(e) Read the display on the Techstream.
Main Body
OK:
Normal conditions listed above are displayed.
Result:
B -- INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (LH OR RH)
C -- INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY (LH OR RH)
D -- INSPECT BACK DOOR LOCK ASSEMBLY
A -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Interior Lighting System
2. INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (LH OR RH)
(a) Disconnect the front door courtesy light switch assembly connector.
(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 ASSEMBLY Removal
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - SWITCH)
(a) for Front LH
(1) Disconnect the 2D instrument panel junction block assembly connector.
(2) Disconnect the P5 front door courtesy light switch assembly LH connector.
(3) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
(b) for Front RH
(1) Disconnect the 2D instrument panel junction block assembly connector.
(2) Disconnect the Q3 front door courtesy light switch assembly RH connector.
(3) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
(a) for Front LH
(1) Remove the instrument panel junction block assembly Removal.
(2) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
(3) Measure the resistance according to the value(s) in the table below.
Text in Illustration
Standard Resistance:
(b) for Front RH
(1) Remove the instrument panel junction block assembly Removal.
(2) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
(3) Measure the resistance according to the value(s) in the table below.
Text in Illustration
Standard Resistance:
NG -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Removal
OK -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal
5. INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY (LH OR RH)
(a) Disconnect the rear door courtesy light switch assembly connector.
(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 ASSEMBLY Removal
OK -- Continue to next step.
6. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - REAR COURTESY LIGHT SWITCH)
(a) for Rear LH
(1) Disconnect the H18 main body ECU (multiplex network body ECU) connector.
(2) Disconnect the P12 rear door courtesy light switch assembly LH connector.
(3) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
(b) for Rear RH
(1) Disconnect the H16 main body ECU (multiplex network body ECU) connector.
(2) Disconnect the Q7 rear door courtesy light switch assembly RH connector.
(3) 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 (MULTIPLEX NETWORK BODY ECU) Removal
7. INSPECT BACK DOOR LOCK ASSEMBLY
(a) Remove the back door lock assembly Removal.
(b) Check the operation of the door lock motor.
(1) Move the door lock to the lock position.
(2) Apply auxiliary battery voltage to the door lock motor and check the operation of the door lock motor.
OK:
(c) Check the operation of the door courtesy switch.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPLACE BACK DOOR LOCK ASSEMBLY Removal
OK -- Continue to next step.
8. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK - MAIN BODY ECU)
(a) Disconnect the H16 main body ECU (multiplex network body ECU) connector.
(b) Disconnect the Q17 back door lock assembly 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 (MULTIPLEX NETWORK BODY ECU) Removal