Lighting System Door Courtesy Switch Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER (DOOR COURTESY SWITCH)

INSPECT COURTESY LIGHT SWITCH

CHECK WIRE HARNESS (MAIN BODY ECU - COURTESY LIGHT SWITCH)

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch on (IG) and press the intelligent tester main switch ON.
   

3. Select the items below in the Data List, and read the displays on the intelligent tester.
   
   

   Main body ECU:

   
   

   Item	Measurement Item/Display (Range)	Normal Condition	Diagnostic Note
   D Dor Cty SW	Driver's door courtesy switch signal/ON or OFF	ON: Driver side door is open OFF: Driver side door is closed	-
   P Dor Cty SW	Passenger's door courtesy switch signal/ON or OFF	ON: Front passenger side door is open OFF: Front passenger door is closed	-
   RR Dor Cty SW	Rear door courtesy switch signal/ON or OFF	ON: Rear right passenger side door is open OFF: Rear right passenger side door is closed	-
   RL Dor Cty SW	Rear door courtesy switch signal/ON or OFF	ON: Rear left passenger side door is open OFF: Rear left passenger side door is closed	-
   Back Dor Cty SW	Back door courtesy switch signal/ON or OFF	ON: Back door is open OFF: Back door is closed	-

   OK:

   Condition sign can be displayed.
   

1. Remove the door courtesy light switch.
   

2. Measure the resistance of the switch.
   

   Standard resistance:

   Front LH, Front RH, Rear LH, Rear RH, Back door

   Tester Connection	Condition	Specified Condition
   1 - Body ground	OFF	10 kΩ or higher
   	ON	Below 1 Ω

1. Connect the courtesy light switch.
   

2. Disconnect the IA, IC and ID instrument panel junction block connectors.
   

3. Disconnect the E18 main body ECU connector.
   

4. Measure the resistance of the wire harness side connectors.
   
   

   Standard resistance:

   for LHD (front driver side)

   Tester Connection	Condition	Specified Condition
   IA-21 (DCTY) - Body ground	Front driver side door is opened	Below 1 Ω
   	Front driver side door is closed	10 kΩ or higher

   for RHD (front driver side)

   Tester Connection	Condition	Specified Condition
   IC-6 (DCTY) - Body ground	Front driver side door is opened	Below 1 Ω
   	Front driver side door is closed	10 kΩ or higher

   
   

   for LHD (front passenger side):

   Tester Connection	Condition	Specified Condition
   IC-14 (PCTY) - Body ground	Front passenger side door is opened	Below 1 Ω
   	Front passenger side door is closed	10 kΩ or higher

   for RHD (front passenger side)

   Tester Connection	Condition	Specified Condition
   IA-24 (PCTY) - Body ground	Front passenger side door is opened	Below 1 Ω
   	Front passenger side door is closed	10 kΩ or higher

   for Rear door RH:

   Tester Connection	Condition	Specified Condition
   ID-7 (RRCY) - Body ground	Rear door RH is opened	Below 1 Ω
   	Rear door RH is closed	10 kΩ or higher

   for Rear door LH:

   Tester Connection	Condition	Specified Condition
   E18-8 (LCTY) - Body ground	Rear door LH is opened	Below 1 Ω
   	Rear door LH is closed	10 kΩ or higher

   for Back door:

   Tester Connection	Condition	Specified Condition
   IA-7 (BCTY) - Body ground	Back door is opened	Below 1 Ω
   	Back door is closed	10 kΩ or higher