Door Courtesy Switch Circuit
LIGHTING: LIGHTING SYSTEM: Door Courtesy Switch Circuit
- Door Courtesy Switch Circuit
DESCRIPTION
The main body ECU RH detects the condition of each door courtesy switch and sends a signal to each ECU via the multiplex communication circuit.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT
The procedure is the same for each door courtesy switch circuit. First, inspect the suspected door courtesy switch circuit.
PROCEDURE
1. READ VALUE USING TECHSTREAM
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Select the following menu items: Body Electrical / Body / Data List.
(e) Read the display on the Techstream.
Body (Main Body ECU RH):
Body (Main Body ECU RH)::
OK:
Condition sign can be displayed.
Result:
D -- INSPECT DOOR COURTESY SWITCH (REAR LH AND REAR RH)
C -- INSPECT DOOR COURTESY SWITCH (FRONT RH)
B -- INSPECT DOOR COURTESY SWITCH (FRONT LH)
A -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. INSPECT DOOR COURTESY SWITCH (FRONT LH)
Inspection Front Door Courtesy Switch
OK:
Door courtesy switch is normal.
NG -- REPLACE DOOR COURTESY SWITCH (FRONT LH)
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (DOOR COURTESY SWITCH (FRONT LH) - MAIN BODY ECU RH)
(a) Disconnect the P1 ECU connector.
(b) Disconnect the Q11 switch 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 RH (COWL SIDE J/B RH)
4. INSPECT DOOR COURTESY SWITCH (FRONT RH)
Inspection Front Door Courtesy Switch
OK:
Door courtesy switch is normal.
NG -- REPLACE DOOR COURTESY SWITCH (FRONT RH)
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (DOOR COURTESY SWITCH (FRONT RH) - MAIN BODY ECU RH)
(a) Disconnect the J75 ECU connector.
(b) Disconnect the P9 switch 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 RH (COWL SIDE J/B RH)
6. INSPECT DOOR COURTESY SWITCH (REAR LH AND REAR RH)
Inspection Rear Door Courtesy Switch
OK:
Door courtesy switch is normal.
NG -- REPLACE DOOR COURTESY SWITCH (REAR LH OR REAR RH)
OK -- Continue to next step.
7. CHECK HARNESS AND CONNECTOR (DOOR COURTESY SWITCH (REAR LH OR REAR RH) - MAIN BODY ECU RH)
(a) Check the wire harness between the cowl side junction block RH and door courtesy switch (rear LH).
(1) Disconnect the RA junction block connector.
(2) Disconnect the Q17 switch connector.
(3) Measure the resistance according to the value(s) in the table below.
Standard resistance:
(b) Check the wire harness between the main body ECU RH and door courtesy switch (rear RH).
(1) Disconnect the P1 ECU connector.
(2) Disconnect the P16 switch 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 RH (COWL SIDE J/B RH)