Inspection steps

CAUTION:

Before performing troubleshooting that uses CAN communication of the entry & start system, perform the inspection in "How to troubleshoot", and check that there are no problems in the communication system. (Refer to HOW TO PROCEED WITH TROUBLESHOOTING )
Before replacing the collation ECM (smart key ECM ASSY), the steering lock actuator ASSY (steering lock ECM), or the ID code box (immobilizer code ECM), refer to "ENTRY & START SYSTEM (ENTRY FUNCTION) ".
If the entry & start system has been disabled by the entry & start system customize settings, enable it before performing troubleshooting. (Refer to CUSTOMIZE PARAMETERS )
When replacing the steering lock actuator ASSY (steering lock ECM), before starting the engine, turn the steering wheel left and right, and check that the steering has been unlocked. If for some reason the steering is locked, put the vehicle in IG OFF, open and close a door, press the engine switch and unlock the steering. By doing so, you can prevent starting the engine with the steering still locked.
After finishing repair, check that the problem doesn't occur again.
Before performing the following inspection steps, check the fuses related to this system.

NOTE: With the engine stopped, if you repeatedly step on the brake pedal, the brake booster pressure is released. This increases the force on the brake pedal necessary to make the stop light turn on.*

*: for automatic transmission

Checking the battery
1. Measure the battery voltage.
  Voltage: 11 to 14 V
  NOTE:
  - You can check if the vehicle battery is discharged by operating the horn.
  - If the battery voltage is 11 V or less, it is necessary to charge or replace the battery.
  OK: Go to Next Step
Checking the DTC (all)
1. Using the SSM3, check the DTC output for all systems.
  Criteria: No DTC is output
  
  NG: Proceed to "List of diagnostic codes". (Refer to DIAGNOSTIC TROUBLE CODE CHART )
  
  OK: Go to Next Step
Checking the waveform environment
1. If a problem occurs only in certain places or at certain times, it is likely the effect of radio wave interference.
  NOTE: You can check if the problem is due to radio wave interference or not by holding the electrical key transmitter ASSY up to the door control receiver (RF band).
  
  Next

Checking the engine switch status

Enter the vehicle interior holding the electrical key transmitter sub-assembly.
Put the shift lever in the P position.*
*: for automatic transmission

Stepping on the brake pedal *1 or the clutch pedal *2, press the engine switch, and check that the power mode changes.

*1: With automatic transmission

*2: for manual transmission

RESULT

Result	Go to
The power mode changes in the following way (functioning properly): OFF →ACC ON →IG ON →OFF	A
The power mode does not change to IG ON or ACC ON.	B
The power mode does not change to IG ON but does change to ACC ON.	C
The power mode does not change to ACC ON but does change to IG ON.	D

B: See "THE POWER MODE DOES NOT CHANGE TO ON (IG AND ACC) " (Refer to )

C: See "THE POWER MODE DOES NOT CHANGE TO ON (IG) " (Refer to )

D: See "THE POWER MODE DOES NOT CHANGE TO ON (ACC) " (Refer to )

A: Go to Next Step

Checking the cranking function

Enter the vehicle interior holding the electrical key transmitter sub-assembly.
Put the shift lever in the P position.*
*: for automatic transmission
Step on the brake pedal *1 or the clutch pedal *2.
*1: With automatic transmission

*2: for manual transmission

If the entry key indicator light of the combination meter ASSY lights up green, press the engine switch, and check that the engine cranks.

Criteria: The engine cranks.

RESULT

Result	Go to
NG	A
OK	B

B: See the "EFI SYSTEM (FA20) " (Symptom table)

A: Go to Next Step

Reading the values using the SSM3 (immobilizer)

Connect the SSM3 to the DLC3.
Turn the ignition switch to ON.
Turn on the SSM3.
Input the following menus: [Keyless access system] →[Collation ECM] →[Current Data Display & Save]

Based on the contents of the SSM3 display, read the [Current Data Display & Save].

ENTRY & START

Tester display	Measurement items / range	Normal condition	Notes for diagnosis
[Immobilizer]	Immobilizer system status, as determined by the collation ECM (smart key ECM ASSY) / [Set] or [Unset]	[Set]: The engine immobilizer is set (starting the engine is prohibited) (IG OFF) [Unset]: The engine immobilizer is not set (starting the engine is permitted) (ACC ON or IG ON)	If the immobilizer cannot be unset, this item is used to check if the collation ECM (smart key ECM ASSY) is causing the problem. If this item is [Set], the engine will not start.

Criteria: When the power changes to ACC ON or IG ON, the [Current Data Display & Save] item changes to unset.

RESULT

Result	Go to
OK	A
NG (when there is an ID code box)	B
NG (when there is no ID code box)	C

B: Go to Step 10.

C: Go to Step 11.

A: Go to Next Step

Checking the combination meter ASSY (entry key indicator light)

While carrying the electrical key transmitter sub-assembly, enter the vehicle interior, put the shift lever in P *1, and while stepping on the brake pedal *1 or the clutch pedal *2, check if the entry key indicator light of the combination meter ASSY changes.

*1: With automatic transmission

*2: for manual transmission

Criteria: The entry key indicator light lights up green.

NOTE: When performing the above procedure, if the entry key indicator of the combination meter ASSY lights up green, P, N, the brake pedal *1, and the clutch pedal *2 are operating properly.

*1: With automatic transmission

*2: for manual transmission

RESULT

Result	Go to
OK	A
NG (with automatic transmission)	B
NG (with manual transmission)	C

B: Go to Step 14.

C: Go to Step 20.

A: Go to Next Step

Reading the values using the SSM3 (STARTER REQUEST SIGNAL)

Connect the SSM3 to the DLC3.
Turn the ignition switch to ON.
Turn on the SSM3.
Input the following menus: [Keyless access system] →[Power Supply ECM] →[Current Data Display & Save]

Based on the contents of the SSM3 display, read the [Current Data Display & Save].

POWER SOURCE CONTROL

Tester display

Measurement items / range

Normal condition

Notes for diagnosis

[Starter request signal monitor]

Status of the engine start command signal 1 / [OFF] or [ON]

[OFF]: The engine switch is released after approx. 1 second.
[ON]: Put the shift lever in P
⁽¹⁾, step on the brake pedal ⁽¹⁾ or the clutch pedal ⁽²⁾, and holding the electrical key transmitter ASSY, press the engine switch.

If the engine does not start due to a problem in the start request signal, [OFF] is displayed.
If you press the engine switch, the time [ON] is displayed will be very short. Therefore, it is necessary to press and hold the engine switch for a certain amount of time.

⁽¹⁾	With automatic transmission

⁽²⁾	for manual transmission

Criteria: The displayed contents change according to the engine switch operation.

CAUTION: Before you press the engine switch, check that the entry key indicator of the combination meter ASSY lights up green.

NG: Replacement of the collation ECM (smart key ECM ASSY)

OK: Go to Next Step

Checking the harnesses and connectors (collation ECM (smart key ECM ASSY) - chassis ground)

Remove the D48 connector of the collation ECM (smart key ECM ASSY).
Remove the A33 connector of the ECM.

Measure the resistance according to the following table.

RESISTANCE

Inspection terminals	Inspection conditions	Standard value
D48-7 (STSW) - A33-17 (START)	Always	1 Ωor less
D48-7 (STSW) - chassis ground	Always	10 kΩ or more

NG: Repair or replacement of the harnesses or connectors

OK: See the "EFI SYSTEM (FA20) " (Symptom table)

Reading the values using the SSM3 (S Code Check)

Connect the SSM3 to the DLC3.
Turn the ignition switch to ON.
Turn on the SSM3.
Input the following menus: [Keyless access system] →[Collation ECM] →[Current Data Display & Save]

Based on the contents of the SSM3 display, read the [Current Data Display & Save].

ENTRY & START

Tester display	Measurement items / range	Normal condition	Notes for diagnosis
[S Code Check]	Confirmation result of the collation ECM (smart key ECM ASSY) code and the ID code box (immobilizer code ECM) code / [OK] or [NG]	[OK]: Normal confirmation result [NG]: Abnormal confirmation result	If [NG] is displayed: The S code is not registered for the collation ECM (smart key ECM ASSY) and the ID code box (immobilizer code ECM). The steering is not locked. The steering is not unlocked (you cannot start the engine).

Criteria: OK (OK result of the S Code Check) is displayed on the screen.

NG: Go to Step 23.

OK: Go to Next Step

Checking the steering lock
1. When in ACC ON, check that the steering can be unlocked.
  Criteria: The steering is unlocked.
  
  NG: Go to Step 25.
  
  OK: Go to Next Step

Reading the values using the SSM3 (IMMOBILISER)

Connect the SSM3 to the DLC3.
Turn the ignition switch to ON.
Turn on the SSM3.
Input the following menus: [Keyless access system] →[Collation ECM] →[Current Data Display & Save]

Based on the contents of the SSM3 display, read the [Current Data Display & Save].

ENTRY & START

Tester display	Measurement items / range	Normal condition	Notes for diagnosis
[Immobilizer]	Immobilizer system status, as determined by the collation ECM (smart key ECM ASSY) / [Set] or [Unset]	[Unset]: The engine immobilizer is not set (ACC ON or IG ON) [Set]: The engine immobilizer is set (IG OFF)	If the immobilizer cannot be unset, this item is used to check if the collation ECM (smart key ECM ASSY) is causing the problem. If this item is [Set], the engine will not start.

Criteria: When the power changes to ACC ON or IG ON, the [Current Data Display & Save] items changes to unset.

RESULT

Result	Go to
OK	A
NG (when there is an ID code box)	B
NG (when there is no ID code box)	C

B: Go to Step 29.

C: Replacement of the collation ECM (smart key ECM ASSY)

A: Go to Next Step

Reading the values using the SSM3 (STARTER REQUEST SIGNAL)

Connect the SSM3 to the DLC3.
Turn the ignition switch to ON.
Turn on the SSM3.
Input the following menus: [Keyless access system] →[Collation ECM] →[Current Data Display & Save]

Based on the contents of the SSM3 display, read the [Current Data Display & Save].

POWER SOURCE CONTROL

Tester display

Measurement items / range

Normal condition

Notes for diagnosis

[Starter request signal monitor]

Status of the engine start command signal 1 / [OFF] or [ON]

[OFF]: The engine switch is released after approx. 1 second.
[ON]: Put the shift lever in P ⁽¹⁾, step on the brake pedal ⁽¹⁾ or the clutch pedal ⁽²⁾, and holding the electrical key transmitter ASSY, press the engine switch.

If the engine does not start due to a problem in the start request signal, [OFF] is displayed.
If you press the engine switch, the time [ON] is displayed will be very short. Therefore, it is necessary to press and hold the engine switch for a certain amount of time.

⁽¹⁾	With automatic transmission

⁽²⁾	for manual transmission

Criteria: The displayed contents change according to the engine switch operation.

CAUTION: Before you press the engine switch, check that the entry key indicator of the combination meter ASSY lights up green.

NG: Replacement of the collation ECM (smart key ECM ASSY)

OK: Complete

Reading the values using the SSM3 (NEUTRAL SW / CLUTCH SW, SHIFT SWITCH STATUS P OR N)

Connect the SSM3 to the DLC3.
Turn the ignition switch to ON.
Turn on the SSM3.
Input the following menus: [Keyless access system] →[Power Supply ECM] →[Current Data Display & Save]

Based on the contents of the SSM3 display, read the [Current Data Display & Save].

POWER SOURCE CONTROL

Tester display	Measurement items / range	Normal condition	Notes for diagnosis
[Neutral SW/Clutch SW]	Shift position (P, N) / [OFF] or [ON]	[OFF]: The shift lever is not in P or N, the pedal is not being stepped on [ON]: The shift lever is in P or N, the pedal is being stepped on.	Using this item, determine if there is any problem with the parking / neutral position switch. When this item is [OFF], the engine will not start.

Input the following menus: [Engine Control System] →[Current Data Display & Save]

ENGINE AND ECT

Tester display	Measurement items / range	Normal condition	Notes for diagnosis
[Shift SW Status (P Range)]	Status of the parking / neutral position switch / [OFF] or [ON]	[OFF]: The shift lever is not in P [ON]: The shift lever is in P.	If a problem is found, the engine will not crank.
[Shift SW Status (N Range)]	Status of the parking / neutral position switch / [OFF] or [ON]	[OFF]: The shift lever is not in N [ON]: The shift lever is in N.	If a problem is found, the engine will not crank.

Criteria: The [Current Data Display & Save] items change based on the shift position.

NG: Go to Step 16.

OK: Go to Next Step

Reading the values using the SSM3 (STOP LIGHT SWITCH 1)

Connect the SSM3 to the DLC3.
Turn the ignition switch to ON.
Turn on the SSM3.
Input the following menus: [Keyless access system] →[Power Supply ECM] →[Current Data Display & Save]

Based on the contents of the SSM3 display, read the [Current Data Display & Save].

POWER SOURCE CONTROL

Tester display	Measurement items / range	Normal condition	Notes for diagnosis
[Stop Light Switch 1]	Brake pedal status / [OFF] or [ON]	[OFF]: The brake pedal is not being stepped on [ON]: The brake pedal is being stepped on	Using this item, determine if there is any problem with the parking / neutral position switch. When this item is [OFF], the engine will not start. If there is a problem caused by this item, if you press the engine switch for a certain amount of time, you can start the engine.

Criteria: If you remove your foot after stepping on the brake pedal, the [Current Data Display & Save] item changes.

NG: Go to Step 18.

OK: Replacement of the collation ECM (smart key computer ASSY)

Unit inspection of the parking / neutral position switch ASSY
1. Remove the parking / neutral position switch ASSY.
2. Inspect the parking / neutral position switch ASSY.
  NG: Replacement of the parking / neutral position switch ASSY
  
  OK: Go to Next Step

Checking the harnesses and connectors (collation ECM (smart key ECM ASSY) - parking / neutral position switch ASSY)

Remove the D48 connector of the collation ECM (smart key ECM ASSY).
Remove the L2 connector of the parking / neutral position switch ASSY.

Measure the resistance according to the following table.

RESISTANCE

Tester display	Inspection conditions	Standard value
D48-5 (N-SW) - L2-1	Always	1 Ωor less
L2-9 - Chassis ground	Always	1 Ωor less
D48-5 (N-SW) - chassis ground	Always	10 kΩ or more

NG: Repair or replacement of the harnesses or connectors

OK: Replacement of the collation ECM (smart key computer ASSY)

Unit inspection of the stop light switch ASSY
1. Remove the stop light switch ASSY. (Refer to REMOVAL )
2. Inspect the stop light switch ASSY. (Refer to UNIT INSPECTION )
  NG: Replacement of the stop light switch ASSY
  
  OK: Go to Next Step
Checking the harnesses and connectors (collation ECM (smart key ECM ASSY) - stop light switch ASSY) (Refer to DTC B2285 [STEERING LOCK POSITION SIGNAL ABNORMAL] )
NG: Repair or replacement of the harnesses or connectors

OK: Replacement of the collation ECM (smart key computer ASSY)

Reading the values using the SSM3 (NEUTRAL SW / CLUTCH SW)

Connect the SSM3 to the DLC3.
Turn the ignition switch to ON.
Turn on the SSM3.
Input the following menus: [Keyless access system] →[Power Supply ECM] →[Current Data Display & Save]

Based on the contents of the SSM3 display, read the [Current Data Display & Save].

POWER SOURCE CONTROL

Tester display	Measurement items / range	Normal condition	Notes for diagnosis
[Neutral SW/Clutch SW]	Clutch pedal status / [OFF] or [ON]	[OFF]: The brake pedal is not being stepped on [ON]: The brake pedal is being stepped on	Using this item, determine if there is any problem with the clutch position switch. When this item is [OFF], the engine will not start.

Criteria: Based on the status of the clutch pedal, [ON] (stepping on the clutch pedal) and [OFF] (your foot removed from the clutch pedal) are displayed on the screen.

NG: Go to Step 21.

OK: Replacement of the collation ECM (smart key computer ASSY)

Unit inspection of the clutch start switch ASSY
1. Remove the clutch start switch ASSY. (Refer to INSTALLATION )
2. Inspect the clutch start switch ASSY. (Refer to ON-VEHICLE INSPECTION )
  NG: Repair or replacement of wiring harness or connector
  
  OK: Go to Next Step

Checking the harnesses and connectors (collation ECM (smart key ECM ASSY) - clutch start light switch ASSY)

Remove the D48 connector of the collation ECM (smart key ECM ASSY).
Remove the A20 connector of the clutch start switch ASSY.

Measure the resistance according to the following table.

RESISTANCE

Tester display	Inspection conditions	Standard value
D48-10 (CLUT) - A20-2	Always	1 Ωor less
D48-10 (CLUT) - chassis ground	Always	10 kΩ or more

Reconnect the A20 connector of the clutch start switch ASSY.

Measure the voltage according to the following table.

VOLTAGE

Inspection terminals	Inspection conditions	Standard value
D48-10 (CLUT) - chassis ground	Remove your foot from the clutch pedal →step on the clutch pedal	1V or less →9 V or more

NG: Repair or replacement of the harnesses or connectors

Fig 1: Identifying Smart Key ECM Assembly Connector STAR Terminal

Courtesy of SUBARU OF AMERICA, INC.

OK: Replacement of the collation ECM (smart key computer ASSY)

Replacement of the collation ECM (smart key computer ASSY)

Replace the collation ECM (smart key ECM ASSY) with a new one.
CAUTION: When replacing the collation ECM (smart key ECM ASSY), it is also necessary to replace all the electrical key transmitter subassemblies.
Perform the registration settings. (Refer to the "immobilizer registration manual")

Using [Current Data Display & Save], check if S code collation is functioning properly.

ENTRY & START

Tester display	Measurement items / range	Normal condition	Notes for diagnosis
[S Code Check]	Confirmation result of the collation ECM (smart key ECM ASSY) code and the ID code box (immobilizer code ECM) code / [OK] or [NG]	[OK]: Normal confirmation result [NG]: Abnormal confirmation result	If [NG] is displayed: The S code is not registered for the collation ECM (smart key ECM ASSY) and the ID code box (immobilizer code ECM). The steering is not locked. The steering is not unlocked (you cannot start the engine).

Criteria: [OK] is displayed on the screen.

NG: Go to Step 24.

OK: Complete

Replacement of the ID code box (immobilizer code ECM)

Replace the ID code box (immobilizer code ECM) with a new one.
Perform the registration settings. (Refer to the "immobilizer registration manual")

Using [Current Data Display & Save], check if S code collation is functioning properly.

ENTRY & START

Tester display	Measurement items / range	Normal condition	Notes for diagnosis
[S Code Check]	Confirmation result of the collation ECM (smart key ECM ASSY) code and the ID code box (immobilizer code ECM) code / [OK] or [NG]	[OK]: Normal confirmation result [NG]: Abnormal confirmation result	If [NG] is displayed: The S code is not registered for the collation ECM (smart key ECM ASSY) and the ID code box (immobilizer code ECM). The steering is not locked. The steering is not unlocked (you cannot start the engine).

Criteria: [OK] is displayed on the screen.

Next: Complete

Reading the values using the SSM3 (STEERING UNLOCK SWITCH)

Connect the SSM3 to the DLC3.
Turn the ignition switch to ON.
Turn on the SSM3.
Input the following menus: [Keyless access system] →[Power Supply ECM] →[Current Data Display & Save]

Based on the contents of the SSM3 display, read the [Current Data Display & Save].

POWER SOURCE CONTROL

Tester display	Measurement items / range	Normal condition	Notes for diagnosis
[Steering unlock SW]	Status of the steering lock sensor output from the steering lock actuator ASSY / [OFF] or [ON]	[OFF]: The steering is locked. [ON]: The steering is unlocked.	When the shift lever is in P, if a door is opened or closed with the engine switch off, the steering is locked. If the electrical key transmitter ASSY is in the vehicle interior, and the engine switch is on (ACC) or on (IG), the steering is unlocked. If the steering unlock signal is off, the engine will not start.

Criteria: [ON] is displayed for the [Current Data Display & Save] item (Steering lock is unlocked).

NG: Go to Step 26.

OK: See "STEERING LOCK SYSTEM " (steering lock cannot be unlocked)

Reading the values using the SSM3 (L Code Check)

Connect the SSM3 to the DLC3.
Turn the ignition switch to ON.
Turn on the SSM3.
Input the following menus: [Keyless access system] →[Collation ECM] →[Current Data Display & Save]

Based on the contents of the SSM3 display, read the [Current Data Display & Save].

ENTRY & START

Tester display	Measurement items / range	Normal condition	Notes for diagnosis
[L Code Check]	Confirmation result of the ID code box (immobilizer code ECM) code and the steering lock actuator ASSY (steering lock ECM) / [OK] or [NG]	[OK]: Normal confirmation result [NG]: Abnormal confirmation result	If [NG] is displayed: The L code is not registered for ID code box (immobilizer code ECM) or the steering lock actuator ASSY (steering lock ECM). The steering is not locked. The steering is not unlocked (you cannot start the engine).

Criteria: If the electrical key transmitter ASSY is in the vehicle interior, the [Current Data Display & Save] item changes to [OK].

NOTE: Reasons for confirmation failure:

There is a problem in the steering lock ECM and ID code box (immobilizer code ECM)*.
There is a problem in communications between ECMs.
The ECM was replaced, but is not yet registered.
The ECM was replaced with an ECM that has a code that was already registered.

*: The ID code box is included.

NG: Go to Step 28.

OK: Go to Next Step

Replacement of the steering lock actuator ASSY (steering lock ECM)
1. Replace the steering lock actuator ASSY (steering lock ECM) with a new one.
2. Perform the registration settings. (Refer to the "immobilizer registration manual")
3. Turn the ignition switch to ON.
4. Operate the steering wheel to check the steering status.
  Next: Complete

Replacement the steering lock actuator ASSY (steering lock ECM)

Replace the steering lock actuator ASSY (steering lock ECM) with a new one.
Perform the registration settings. (Refer to the "immobilizer registration manual")

Using [Current Data Display & Save], check if L code collation is functioning properly.

ENTRY & START

Tester display	Measurement items / range	Normal condition	Notes for diagnosis
[L Code Check]	Confirmation result of the ID code box (immobilizer code ECM) code and the steering lock actuator ASSY (steering lock ECM) / [OK] or [NG]	[OK]: Normal confirmation result [NG]: Abnormal confirmation result	If [NG] is displayed: The L code is not registered for ID code box (immobilizer code ECM) or the steering lock actuator ASSY (steering lock ECM). The steering is not locked. The steering is not unlocked (you cannot start the engine).

Criteria: OK ([L Code Check] OK) is displayed on the screen.

RESULT

Result	Go to
OK	A
NG (when there is an ID code box)	B
NG (when there is no ID code box)	C

B: Replacement of the ID code box (immobilizer code ECM)

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

A: Go to Next Step

Replacement of the collation ECM (smart key computer ASSY)

Replace the collation ECM (smart key ECM ASSY) with a new one.
Perform the registration settings. (Refer to the "immobilizer registration manual")

Using [Current Data Display & Save], check if S code collation is functioning properly.

ENTRY & START

Tester display	Measurement items / range	Normal condition	Notes for diagnosis
[S Code Check]	Confirmation result of the collation ECM (smart key ECM ASSY) code and the ID code box (immobilizer code ECM) code / [OK] or [NG]	[OK]: Normal confirmation result [NG]: Abnormal confirmation result	If [NG] is displayed: The S code is not registered for the collation ECM (smart key ECM ASSY) and the ID code box (immobilizer code ECM). The steering is not locked. The steering is not unlocked (you cannot start the engine).

Criteria: [OK] is displayed on the screen.

NG: Go to Step 30.

OK: Complete

Replacement of the ID code box (immobilizer code ECM)

Replace the ID code box (immobilizer code ECM) with a new one.
Perform the registration settings. (Refer to the "immobilizer registration manual")

Using [Current Data Display & Save], check if S code collation is functioning properly.

ENTRY & START

Tester display	Measurement items / range	Normal condition	Notes for diagnosis
[S Code Check]	Confirmation result of the collation ECM (smart key ECM ASSY) code and the ID code box (immobilizer code ECM) code / [OK] or [NG]	[OK]: Normal confirmation result [NG]: Abnormal confirmation result	If [NG] is displayed: The S code is not registered for the collation ECM (smart key ECM ASSY) and the ID code box (immobilizer code ECM). The steering is not locked. The steering is not unlocked (you cannot start the engine).

Criteria: [OK] is displayed on the screen.

Next: Complete