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Check Door Switch

CHECK DOOR SWITCH

Step Check Yes No
1 CHECK DOOR SWITCH CIRCUIT. 
Measure the voltage between the security control unit harness connector terminal and chassis ground when any door or rear gate is opened.
Connector & terminal 
Front and rear door: 
(B93) No. 5 (+) - Chassis ground (-): 
Trunk lid or rear gate: 
(B93) No. 4 (+) - Chassis ground (-): 
Is the voltage 0 V? Go to step 2  . Go to step 3  .
2 CHECK DOOR SWITCH CIRCUIT. 
Measure the voltage between the security control unit harness connector terminal and chassis ground when all doors and rear gate are closed.
Connector & terminal 
Front and rear door: 
(B93) No. 5 (+) - Chassis ground (-): 
Trunk lid or rear gate: 
(B93) No. 4 (+) - Chassis ground (-): 
Is the voltage more than 10 V? The door switch is OK. Go to step 3  .
3 CHECK DOOR SWITCH. 
  1. Disconnect the door switch harness connector.
  2. Measure the resistance between the door switch terminals.

Terminals 
Door switch No. 1 - No. 3: 
Rear gate latch switch (Wagon model) 
No. 1 - No. 2: 
Trunk room light switch (Sedan model) 
No. 1 - No. 2: 
Is the resistance more than 1 M when door switch is pushed? Go to step 4  . Replace the door switch.
4 CHECK DOOR SWITCH. 
Measure the resistance between the door switch terminals.
Terminals 
Door switch No. 1 - No. 3: 
Rear gate latch switch (Wagon model) 
No. 1 - No. 2: 
Trunk room light switch (Sedan model) 
No. 1 - No. 2: 
Is the resistance less than 1 when door switch is released? Check the harness for open circuits and shorts between the security control unit and door switch. Replace the door switch.