SECURITY AND LOCKS > Keyless Entry System

1. SYMPTOM CHART

Symptom	Repair order	Reference
None of the functions of the keyless entry system operate.	1. Check the keyless transmitter battery.
	2. Remove the following fuses and inspect visually. • No. 3 (in fuse & relay box) • No. 7 (in fuse & relay box) • No. 8 (in main fuse box)	If the fuse is blown out, replace the fuse with a new part. When there is no defective with the fuse, check the power supply and ground circuit.
	3. Check the keyless entry control module.
	4. Check the power supply and ground circuit for body integrated unit.
	5. Check the registration connector circuit.
	6. Check the key warning switch.
	7. Check the door switch.
	8. Check the body integrated unit.
The keyless transmitter cannot be registered.	1. Check the keyless transmitter battery.
	2. Check the registration connector circuit.
	3. Check the key warning switch.
	4. Check the door lock switch signal.
	5. Check the body integrated unit.
Door lock or unlock does not operate. NOTE: If the door lock control system does not operate when using the door lock switch, check the door lock control system.	1. Check the keyless transmitter battery.
	2. Check the keyless entry control module.
	3. Check the key warning switch.
	4. Check the door switch.
	5. Check the body integrated unit.
The hazard light does not operate.	1. Check the hazard light operation.
The hazard light does not operate.	2. Check the body integrated unit.
Room light does not operate.	1. Check the room light operation.
Room light does not operate.	2. Check the body integrated unit.
Ignition switch illumination does not operate.	1. Check the ignition switch illumination.
Ignition switch illumination does not operate.	2. Check the body integrated unit.

2. CHECK KEYLESS TRANSMITTER BATTERY AND FUNCTION

CAUTION:

Be sure to reset keyless transmitter of other vehicles registered to the inspection target vehicle, and vehicles to which keyless transmitters were registered for inspection, to the condition before performing the inspection. (Re-register the keyless transmitters.)

STEP	CHECK	YES	NO
1.CHECK KEYLESS TRANSMITTER BATTERY. 1) Remove the battery from the keyless transmitter. 2) Check the battery voltage.	Is the voltage 2.5 V or more?		Replace the keyless transmitter battery.
2.CHECK KEYLESS TRANSMITTER. Register the keyless transmitter which operates normally on other vehicles to the inspection target vehicle. 1) Close all the doors and rear gate of inspection target vehicle. 2) Using the keyless transmitter, lock and unlock the doors and rear gate of vehicle.	Can the check vehicle be locked and unlocked properly?		Due to vehicle malfunction, continue the keyless entry system diagnosis.
3.CHECK KEYLESS TRANSMITTER. Register the keyless transmitter of inspection target vehicle to the another vehicle on which the keyless system operates normally.	Is the keyless transmitter registered correctly?		Replace the keyless transmitter.
4.CHECK KEYLESS TRANSMITTER. Check the registered keyless transmitter. 1) Close all the doors and rear gate of the vehicle which keyless system operates normally. 2) Using the keyless transmitter, lock and unlock the doors and rear gate of vehicle.	Does the vehicle operate lock and unlock normally?	Keyless transmitter is OK.	Replace the keyless transmitter.

3. CHECK KEYLESS ENTRY CONTROL MODULE

STEP	CHECK	YES	NO
1.CHECK DIAGNOSTIC TROUBLE CODE (DTC). 1) Prepare the Subaru Select Monitor kit. 2) Turn the ignition switch to ON (engine OFF), and run the “PC application for Subaru Select Monitor”. 3) On the “System Selection Menu”, select {Integ. unit mode}. 4) Select the {Diagnostic Code(s) Display}. 5) Check if the DTC is displayed.	Is DTC B1500 “Keyless UART com. Malfunction” displayed?		Keyless entry control module is normal.
2.CHECK POWER SUPPLY. 1) Disconnect the keyless entry control module harness connector. 2) Measure the voltage between harness connector terminal and chassis ground. Connector & terminal (R80) No. 4 (+) — Chassis ground (−):	Is the voltage 10 V or more?		Check the harness for open circuits or shorts between the keyless entry control module and fuse.
3.CHECK GROUND CIRCUIT. Measure the resistance between harness connector terminal and chassis ground. Connector & terminal (R80) No. 7 — Chassis ground:	Is the resistance less than 10 Ω?		Repair or replace the harness.
4.CHECK KEYLESS ENTRY CONTROL MODULE CIRCUIT. 1) Disconnect the harness connector of body integrated unit. 2) Measure the resistance between harness connector terminals. Connector & terminal (i84) No. 24 — (R80) No. 3:	Is the resistance less than 10 Ω?	Replace the keyless entry control module.	Repair or replace the harness.

4. CHECK BODY INTEGRATED UNIT POWER SUPPLY AND GROUND CIRCUIT

For operation procedures, refer to the INSPECTION of POWER SUPPLY AND GROUND CIRCUIT of the Door Lock Control System.

5. CHECK REGISTRATION CONNECTOR

STEP	CHECK	YES	NO
1.CHECK INPUT CIRCUIT. 1) Prepare the Subaru Select Monitor kit. 2) Turn the ignition switch to ON (engine OFF) and run the “PC application for Subaru Select Monitor”. 3) On «System Selection Menu» display, select {Integ. unit mode}. 4) Select the {Current Data Display & Save}. 5) Select the {Registration SW input}.	Does the display switch between OFF ⇔ ON when the registration connector is inserted/removed?	Registration connector is OK.
2.CHECK HARNESS. 1) Disconnect the body integrated unit connector and registration connector. 2) Check the harness for open or short circuit between body integrated unit and registration connector. Connector & terminal (B281) No. 13 — (B183) No. 1:	Is harness normal?		Repair or replace the harness.
3.CHECK HARNESS. Measure the resistance between the registration connector and chassis ground. Connector & terminal (B184) No. 1 — Chassis ground:	Is the resistance less than 10 Ω?	Replace the body integrated unit.	Repair or replace the harness.

6. CHECK DOOR SWITCH

STEP	CHECK	YES	NO
1.CHECK DOOR SWITCH. 1) Prepare the Subaru Select Monitor kit. 2) Turn the ignition switch to ON (engine OFF) and run the “PC application for Subaru Select Monitor”. 3) On «System Selection Menu» display, select {Integ. unit mode}. 4) Select the {Current Data Display & Save}. 5) Select the {Driver’s door SW input}, {P-door SW input}, {Rear right door SW input}, {Rear left door SW input}, and {R Gate SW input}.	Does the display switch between OFF ⇔ ON when each door or rear gate is opened/closed?	The door and rear gate latch switch are normal.
2.CHECK HARNESS. 1) Disconnect the harness connector of body integrated unit. 2) Disconnect the door switch harness connector that the display does not change. 3) Check the harness for open or short circuits between the body integrated unit terminal and the faulty door switch terminal. Connector & terminal LHD model Front door RH (i84) No. 32 — Chassis ground: Front door LH (i84) No. 19 — Chassis ground: Rear door RH (i84) No. 20 — Chassis ground: Rear door LH (i84) No. 6 — Chassis ground: Rear gate (i84) No. 33 — Chassis ground: RHD model Front door RH (i84) No. 19 — Chassis ground: Front door LH (i84) No. 32 — Chassis ground: Rear door RH (i84) No. 6 — Chassis ground: Rear door LH (i84) No. 20 — Chassis ground: Rear gate (i84) No. 33 — Chassis ground:	Is harness normal?		Repair or replace the harness.
3.CHECK DOOR SWITCH CIRCUIT. Measure the resistance between faulty door switch harness connector terminal and chassis ground. Connector & terminal Front door RH (R12) No. 1 — Chassis ground: Front door LH (R9) No. 1 — Chassis ground: Rear door RH (R16) No. 1 — Chassis ground: Rear door LH (R22) No. 1 — Chassis ground: Rear gate (iD46) No. 3 — Chassis ground:	Is the resistance less than 10 Ω?		Repair or replace the harness.
4.CHECK DOOR SWITCH. Measure the resistance between faulty door switch or rear gate latch switch terminals. Connector & terminal Front RH door switch (R12) No. 1 — No. 3: Front LH door switch (R9) No. 1 — No. 3: Rear RH door switch (R16) No. 1 — No. 3: Rear LH door switch (R22) No. 1 — No. 3: Rear gate latch switch (D46) No. 3 — No. 4:	Is the resistance 1 MΩ or more when the door switch is pushed, or the rear gate is closed?		Replace the door switch, or rear gate latch and actuator assembly.
5.CHECK DOOR SWITCH. Measure the resistance between faulty door switch or rear gate latch switch terminals. Connector & terminal Front RH door switch (R12) No. 1 — No. 3: Front LH door switch (R9) No. 1 — No. 3: Rear RH door switch (R16) No. 1 — No. 3: Rear LH door switch (R22) No. 1 — No. 3: Rear gate latch switch (D46) No. 3 — No. 4:	Is the resistance less than 1 Ω when door switch is released, or the rear gate is opened?	Replace the body integrated unit.	Replace the door switch, or rear gate latch and actuator assembly.

7. CHECK KEY WARNING SWITCH

STEP	CHECK	YES	NO
1.CHECK KEY WARNING SWITCH. 1) Prepare the Subaru Select Monitor kit. 2) On «System Selection Menu» display, select {Integ. unit mode}. 3) Select the {Current Data Display & Save}. 4) Select the {key-lock warning SW}.	Is the normal input signal displayed when the key is inserted in/removed from the ignition switch?	The key warning switch is OK.
2.CHECK FUSE. Remove and visually check fuse No. 14 (in the main fuse box).	Is the fuse blown out?	Replace the fuse with a new part.
3.CHECK KEY WARNING SWITCH CIRCUIT. 1) Disconnect the harness connector of body integrated unit. 2) Insert the key into ignition switch. (LOCK position) 3) Measure the voltage between harness connector terminal and chassis ground. Connector & terminal (B279) No. 2 (+) — Chassis ground (−):	Is the voltage 10 V or more?
4.CHECK KEY WARNING SWITCH CIRCUIT. 1) Remove the key from ignition switch. 2) Measure the voltage between harness connector terminal and chassis ground. Connector & terminal (B279) No. 2 (+) — Chassis ground (−):	Is the voltage 0 V?	Replace the body integrated unit.
5.CHECK KEY WARNING SWITCH. 1) Disconnect the key warning switch harness connector. 2) Insert the key into ignition switch. (LOCK position) 3) Measure the resistance between key warning switch terminals. Connector & terminal (B350) No. 3 — No. 4:	Is the resistance less than 1 Ω?		Replace the key warning switch.
6.CHECK KEY WARNING SWITCH. 1) Remove the key from ignition switch. 2) Measure the resistance between key warning switch terminals. Connector & terminal (B350) No. 3 — No. 4:	Is the resistance 1 MΩ or more?	Check the following: • Harness for open circuits or shorts between the key warning switch and fuse. • Harness for open or short between the body integrated unit and key warning switch	Replace the key warning switch.

8. CHECK ROOM LIGHT OPERATION

STEP	CHECK	YES	NO
1.CHECK ROOM LIGHT OPERATION. Make sure the room light illuminates when the room light switch is ON, and goes off when the switch is OFF.	Does the room light illuminate or go off?		Check the room light circuit.
2.CHECK ROOM LIGHT OPERATION. 1) Turn the room light switch to the “DOOR” position. 2) Open and close any door.	Does the room light illuminate ⇔ go off (including off delay) when the door is opened and closed?
3.CHECK KEYLESS ENTRY OPERATION. Press the LOCK/UNLOCK button of the keyless transmitter.	Does it operate properly?	Replace the body integrated unit.	Check the keyless entry control module.
4.CHECK ROOM LIGHT. 1) Disconnect the room light connector. 2) Check the room light.	Is room light normal?		Replace the bulb or room light assembly.
5.CHECK HARNESS. 1) Disconnect the connector of body integrated unit. 2) Measure the resistance between body integrated unit connector and room light connector. Connector & terminal (B279) No. 5 — (R52) No. 2:	Is the resistance less than 10 Ω?		Repair or replace the harness.
6.CHECK HARNESS. Measure the voltage between room light connector and chassis ground. Connector & terminal Model without sunroof (R52) No. 3 (+) — Chassis ground (−): Model with sunroof (R52) No. 1 (+) — Chassis ground (−):	Is the voltage 10 V or more?	Replace the body integrated unit.	Repair or replace the harness.

9. CHECK HAZARD LIGHT OPERATION

STEP	CHECK	YES	NO
1.CHECK HAZARD LIGHT OPERATION. Make sure the hazard light blinks when hazard switch is turned to ON.	Does the hazard light blink?		Check the hazard light circuit.
2.CHECK OUTPUT TO HAZARD LIGHT. 1) Turn the ignition switch to OFF. 2) Disconnect the key warning switch harness connector. 3) Prepare the Subaru Select Monitor kit. 4) Turn the ignition switch to ON (engine OFF) and run the “PC application for Subaru Select Monitor”. 5) On «System Selection Menu» display, select {Integ. unit mode}. 6) Select {ECM customizing}. 7) Check {Hazard answer-back setup}, and then switch to ON setting if necessary. 8) Select the {Current Data Display & Save}. 9) Remove the key from ignition switch. 10) Select the {Hazard Output}.	Is output signal present when operating the transmitter LOCK/UNLOCK button?		Check body integrated unit.
3.CHECK CIRCUIT OF HAZARD LIGHT. 1) Disconnect the harness connector of body integrated unit. 2) Disconnect the turn signal and hazard unit harness connector. 3) Measure the resistance between harness connector terminals. Connector & terminal (B281) No. 22 — (B32) No. 8:	Is the resistance less than 10 Ω?	Check body integrated unit.	Repair or replace the harness.

10. CHECK DOOR LOCK ACTUATOR AND CIRCUIT (MODEL WITHOUT DOUBLE LOCK, WITHOUT KEYLESS ACCESS)

For the diagnostic procedure, refer to door lock control system.

11. CHECK DOOR LOCK ACTUATOR AND CIRCUIT (MODEL WITH DOUBLE LOCK, WITHOUT KEYLESS ACCESS)

For the diagnostic procedure, refer to door lock control system.

12. CHECK DOOR LOCK ACTUATOR AND CIRCUIT (MODEL WITHOUT DOUBLE LOCK, WITH KEYLESS ACCESS)

For the diagnostic procedure, refer to door lock control system.

13. CHECK DOOR LOCK ACTUATOR AND CIRCUIT (MODEL WITH DOUBLE LOCK, WITH KEYLESS ACCESS)

For the diagnostic procedure, refer to door lock control system.

14. CHECK IGNITION SWITCH ILLUMINATION

STEP	CHECK	YES	NO
1.CHECK IGNITION CIRCUIT. Check the ignition switch circuit.	Is the circuit normal?		Repair or replace.
2.CHECK DOOR SWITCH CIRCUIT. Check the door switch circuit.	Is the circuit normal?		Repair or replace.
3.CHECK FUSE. Remove and visually check fuse No. 14 (in the main fuse box).	Is the fuse blown out?	Replace the fuse with a new part.
4.CHECK HARNESS. 1) Disconnect the ignition switch illumination harness connector. 2) Measure the voltage between harness connector terminal and chassis ground. Connector & terminal (B224) No. 2 (+) — Chassis ground (−):	Is the voltage 10 V or more?		Check the harness for open circuits or shorts between the ignition switch illumination and fuse.
5.CHECK IGNITION SWITCH ILLUMINATION CIRCUIT. 1) Disconnect the harness connector of body integrated unit and ignition switch illumination harness connector. 2) Check the harness for open circuits and shorts between the body integrated unit harness connector terminal and the ignition switch illumination harness connector terminal. Connector & terminal (B281) No. 23 — (B224) No. 1:	Is harness normal?		Check the harness for open circuits and shorts between the body integrated unit and ignition switch illumination.
6.CHECK IGNITION SWITCH ILLUMINATION BULB. Apply battery voltage to the bulb.	Does the bulb illuminate?	Replace the body integrated unit.	Replace the ignition switch illumination bulb.