Inspection steps

CAUTION:

Some functions of the entry & start system (entry function) use the LIN communication system and the CAN communication system. Inspect the communication function by referring to "How to troubleshoot" (refer to HOW TO PROCEED WITH TROUBLESHOOTING ). Confirm that the communication system is functioning properly before proceeding to repair the entry & start system (entry function).
Before replacing the collation ECM (smart key ECM assembly), refer to "entry & start system (entry function)". (Refer to ENTRY & START SYSTEM (ENTRY FUNCTION) )
An antenna coil is present between the 2 terminals of the indoor electrical key antenna assembly.

NOTE: Ensure that the entry cancel function (one of the customize setting available for the entry & start system) is not enabled. (Refer to CUSTOMIZE PARAMETERS )

Check the entry & start system (entry function).
1. Check if the entry lock/unlock function works properly. (Refer to OPERATION CHECK )
  Criteria: The entry lock/unlock function works properly.
  
  NG: Go to "Symptom table" (entry & start system (entry function)) (refer to NEITHER SMART LOCK NOR SMART UNLOCK OPERATION WORKS ON ANY OF THE DOORS (WIRELESS FUNCTION DOES NOT WORK EITHER). ).
  
  OK: Go to Next Step
Check the entry & start system (start function).
1. Remove the battery from the electrical key transmitter sub-assembly. (Refer to TRANSMITTER BATTERY (WITH SMART ENTRY) )
2. Step on the brake pedal *1 or the clutch pedal *2, and touch the logo side of the electrical key transmitter sub-assembly to the engine switch.
  *1: With automatic transmission
  
  *2: for manual transmission
3. Turn to IG ON, and check if the engine starts when you operate the engine switch.
  NOTE:
  - If the presence of the electrical key transmitter sub-assembly inside the detection area cannot be confirmed, remove the transmitter battery from the electrical key transmitter sub-assembly and then place the electrical key transmitter sub-assembly over the engine switch to check if the engine starts.
  - If the engine does not start during this inspection procedure, the collation ECM (smart key ECM assembly), steering lock actuator assembly (steering lock ECM), or the ID code box*1 might be faulty.
  *1: The ID code box is included.
  
  Criteria: The engine starts.
  
  Fig 1: Checking Entry And Start System
  Courtesy of SUBARU OF AMERICA, INC.
  
  NG: Go to "Entry & start system" (start function) (refer to HOW TO PROCEED WITH TROUBLESHOOTING ).
  
  OK: Go to Next Step
Checking the waveform environment
1. Insert the transmitter battery into the electrical key transmitter sub-assembly. (Refer to TRANSMITTER BATTERY (WITH SMART ENTRY) )
2. Move the electrical key transmitter sub-assembly toward the indoor electrical key antenna assembly no. 1 (front floor) and check if the engine starts.
  CAUTION: If the key is within 0.2 m (0.656 feet) of the indoor electrical key antenna assembly no. 1 (front floor), communication may not be possible.
3. Move the electrical key transmitter sub-assembly toward the indoor electrical key antenna assembly no. 2 (rear floor) and check if the engine starts.
  If a setting other than [All] is specified for [Ignition Available Area] by customization, the engine does not start. Before proceeding with this inspection procedure, check that [All] is selected for this item. (Refer to CUSTOMIZE PARAMETERS )
  
  CAUTION: If the key is within 0.2 m (.0.656 feet) of the indoor electrical key antenna assembly no. 2 (rear floor), communication is not possible.
  NOTE:
  - Try moving the electrical key transmitter sub-assembly closer to the door control receiver, so that it is less exposed to external radio waves. In this way, you can identify if the problem is caused by external radio waves or not.
  - If the failure occurs in certain locations or during certain periods of time, it may be due to interference from external radio waves. In addition, the vehicle can also be affected by external radio waves generated by components installed by a dealer. If such components are found, remove them before inspecting the vehicle.
  - Being close to a broadcast antenna, a large video display, a wireless garage door opener system, a wireless security camera, or a home security system makes the vehicle susceptible to interference from external radio waves. If this is the case, move the vehicle to another location to check if the problem improves.
  - If a tool for checking radio waves such as a signal-strength meter is available, take measurements in the LF band (which is used by the vehicle antenna to create a detection area) and the RF band (which is used by the electrical key transmitter sub-assembly for signal transmission) in the vicinity of the vehicle to check where the radio waves might be present.
  Criteria: The engine starts.
  
  NG: Go to Step 4.
  
  OK: Interference from external radio waves

Perform the keyless access system check.

Perform keyless access system check for the following antennas. (Refer to OPERATION CHECK )
1. Check the indoor electrical key antenna assembly no. 1 (front floor):
  
  Fig 2: Identifying Indoor Electrical Key Antenna Assembly No. 1 Inspection Points (Front Floor)
  Courtesy of SUBARU OF AMERICA, INC.
  
  Check if the wireless door lock buzzer beeps when the electrical key transmitter sub-assembly is located at the inspection points.

Check the indoor electrical key antenna assembly no. 2 (rear floor).

Fig 3: Identifying Indoor Electrical Key Antenna Assembly No. 2 Inspection Points (Rear Floor)

Courtesy of SUBARU OF AMERICA, INC.

Check if the wireless door lock buzzer beeps when the electrical key transmitter sub-assembly is located at the inspection points.

NOTE:

If the buzzer beeps, it means that the indoor transmitter is functioning properly.
You can identify which indoor electrical key antenna assembly (front floor or rear floor) is functioning properly by checking if the buzzer beeps when the key is near the respective antennas.
If the buzzer does not go off when the key is near the indoor electrical key antenna assembly, the circuit inside the collation ECM (smart key ECM assembly) might be faulty.

RESULT

Result	Go to
Front side operation failure	A
Rear floor operation failure	B
Front and rear operation check results are OK.	C

B: Go to Step 9.

C: Replacement of the collation ECM (smart key computer assembly)

A: Go to Next Step

Check the harnesses and connectors (collation ECM (smart key ECM assembly) - indoor electrical key antenna no. 1 (front floor)).

Disconnect the D41 collation ECM (smart key ECM assembly) connector.
Disconnect the D26 indoor electrical key antenna assembly no. 1 (front floor) connector.

Measure the resistance according to the following table.

RESISTANCE

Inspection terminals	Inspection conditions	Standard value
D41-3 (CLG5) - D26-1 (ANTE5)	Always	1 Ωor less
D41-2 (CG5B) - D26-3 (CLGB)	Always	1 Ωor less
D41-3 (CLG5) - chassis ground	Always	10 kΩ or more
D41-2 (CG5B) - chassis ground	Always	10 kΩ or more

NG: Repair or replace the harnesses or connectors.

OK: Go to Next Step

Inspect the collation ECM (smart key ECM assembly) (output to the electrical key antenna assembly no. 1 (front floor)).

Reconnect the D41 connector of the collation ECM (smart key ECM assembly).

Using an oscilloscope, check the waveform.

Fig 4: Electrical Key Antenna Assembly No. 1 Connector Terminals And Output Waveform (Front Floor)

Courtesy of SUBARU OF AMERICA, INC.

CRITERIA

Inspection terminals	Conditions	Tool setting	Specified condition
D26-1 (ANTE5) - D26-3 (CLGB)	Procedure: The engine switch is OFF. A door is open. A door is closed. 30 seconds elapses. The electrical key transmitter sub-assembly is not inside the vehicle.	2 V/DIV., 500 ms/DIV.	Pulse generation (refer to the waveform)

NG: Replacement of the collation ECM (smart key computer assembly)

OK: Go to Next Step

Replace the indoor electrical key antenna assembly no. 1 (front floor).
1. Temporarily replace the indoor electrical key antenna assembly no. 1 (front floor) with a new one or one that functions normally.
  Next
Perform the keyless access system check.
1. Perform keyless access system check for the following antennas. (Refer to OPERATION CHECK )
2. Check the indoor electrical key antenna assembly no. 1 (front floor):
  
  Fig 5: Identifying Indoor Electrical Key Antenna Assembly No. 1 Inspection Points (Front Floor)
  Courtesy of SUBARU OF AMERICA, INC.
  
  Check if the wireless door lock buzzer beeps when the electrical key transmitter sub-assembly is located at the inspection points.
  
  Criteria: The wireless door lock buzzer beeps.
  
  NG: Replacement of the collation ECM (smart key computer assembly)
  
  OK: END (indoor electrical key antenna assembly no. 1 malfunction)

Check the harnesses and connectors (collation ECM (smart key ECM assembly) - indoor electrical key antenna assembly no. 2).

Disconnect the D40 collation ECM (smart key ECM assembly) connector.
Disconnect the H15 indoor electrical key antenna assembly no. 2 (rear floor) connector.

Measure the resistance according to the following table.

RESISTANCE

Inspection terminals	Inspection conditions	Standard value
D40-11 (CLG6) - H15-1 (ANTE6)	Always	1 Ωor less
D40-10 (CG6B) - H15-3 (CLGB)	Always	1 Ωor less
D40-11 (CLG6) - chassis ground	Always	10 kΩ or more
D40-10 (CG6B) - chassis ground	Always	10 kΩ or more

NG: Repair or replace the harnesses or connectors.

OK: Go to Next Step

Inspect the collation ECM (smart key ECM assembly) (output to the indoor electrical key antenna no. 2).

Reconnect the D40 collation ECM (smart key ECM assembly) connector.

Using an oscilloscope, check the waveform.

Fig 6: Indoor Electrical Key Antenna No. 2 Connector Terminals And Output Waveform

Courtesy of SUBARU OF AMERICA, INC.

CRITERIA

Inspection terminals	Conditions	Tool setting	Specified condition
H15-1 (ANTE6) - H15-3 (CLGB)	Procedure: The engine switch is OFF. A door is open. A door is closed. 30 seconds elapses. The electrical key transmitter sub-assembly is not inside the vehicle.	2 V/DIV., 500 ms/DIV.	Pulse generation (refer to the waveform)

NG: Replacement of the collation ECM (smart key computer assembly)

OK: Go to Next Step

Replace the indoor electrical key antenna assembly no. 2 (rear floor).
1. Temporarily replace the indoor electrical key antenna assembly no. 2 (rear floor) with a new one or one that functions normally.
  Next
Perform the keyless access system check.
1. Perform keyless access system check for the following antennas. (Refer to OPERATION CHECK )
  1. Check the indoor electrical key antenna assembly no. 2 (rear floor).
    
    Fig 7: Identifying Indoor Electrical Key Antenna Assembly No. 2 Inspection Points (Rear Floor)
    Courtesy of SUBARU OF AMERICA, INC.
    
    Check if the wireless door lock buzzer beeps when the electrical key transmitter sub-assembly is located at the inspection points.
    
    Criteria: The wireless door lock buzzer beeps.
    
    NG: Replacement of the collation ECM (smart key computer assembly)
    
    OK: END (indoor electrical key antenna assembly no. 2 malfunction)