Check Door Switch

WARNING: This page is about a different car, the 2006 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DOOR SWITCH

Step	Check	Yes	No
1 CHECK DOOR SWITCH CIRCUIT. Measure the voltage between the keyless entry control unit harness connector terminal and chassis ground when any door or rear gate is opened. Connector & terminal Front and rear door: (B176) No. 6 (+) - Chassis ground (-): Trunk lid or rear gate: (B176) No. 7 (+) - 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 keyless entry control unit harness connector terminal and chassis ground when all doors and rear gate are closed. Connector & terminal Front and rear door: (B176) No. 6 (+) - Chassis ground (-): Trunk lid or rear gate: (B176) No. 7 (+) - Chassis ground (-):	Is the voltage more than 10 V?	The door switch is OK.	Go to step 3.
3 CHECK DOOR SWITCH. Disconnect the door switch harness connector. 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 MΩ 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 Ω when door switch is released?	Check the harness for open circuits and shorts between the keyless entry control unit and door switch.	Replace the door switch.