TROUBLE SYMPTOM
Not communicable with Subaru Select Monitor.
Scheme 8
- CAN communication system < Refer to appropriate SYSTEM WIRING DIAGRAM. >
- Keyless access system < Refer to appropriate SYSTEM WIRING DIAGRAM. >
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK OTHER COMMUNICATION. Communicate with the following systems using the Subaru Select Monitor. (Except for unit not equipped) ECM Airbag CM A/C CM Stereo camera | Is the communication possible with each control module? | Go to step 2 . | Perform the "Communication for Initializing Impossible" of LAN system. < Refer to COMMUNICATION FOR INITIALIZING IMPOSSIBLE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| 2 CHECK DTC. Read the DTC of the LAN system using the Subaru Select Monitor. < Refer to OPERATION , Read Diagnostic Trouble Code (DTC). > | Is DTC detected? | Perform the diagnosis according to DTC. | Go to step 3 . |
| 3 CHECK KEYLESS ACCESS CM. Turn the ignition switch to OFF. Disconnect the keyless access CM connector. Connect the disconnected connectors. Perform communication with the keyless access system using the Subaru Select Monitor. | Is communication possible? | It is possible that temporary poor communication occurs. | Replace the keyless access CM. < Refer to REMOVAL , Keyless Access CM. > |
| CAUTION | For replacement procedure of keyless access CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
DTC DETECTING CONDITION
When short circuit occurs in harness between keyless access CM and receiver.
- The keyless access with push button start function (except for emergency function) does not operate properly.
- Operation by the access key button does not function.
| CAUTION | For replacement procedure of keyless access CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". When the harness comes close to the receiver, the performance of keyless access system operation and wireless operation may reduce. So, when replacing or inspecting the receiver and harness, do not change the route and length of the surrounding harnesses. |
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK LAN SYSTEM. Inspect LAN system. | Is LAN system normal? | Go to step 2 . | Perform the inspection according to the diagnosis for LAN system. |
| 2 CHECK HARNESS. Disconnect the keyless access CM connector. Disconnect the receiver connector. Using the tester, measure the resistance between terminals of keyless access CM connector and receiver connector, and keyless access CM and chassis ground. Connector & terminal (i241) No. 19 - (R296) No. 2: (i241) No. 17 - (R296) No. 5: (i241) No. 5 - (R296) No. 4: (R296) No. 1 - Chassis ground | Is the resistance less than 1 ohms? | Go to step 3 . | Repair or replace the open circuit of harness. |
| 3 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground. Connector & terminal (i241) No. 19 - Chassis ground: (i241) No. 17 - Chassis ground: (i241) No. 5 - Chassis ground | Is the resistance 10 kohms or more? | Go to step 4 . | Repair or replace the short circuit of the harness. |
| 4 CHECK RECEIVER. Replace the receiver, and then connect it. < Refer to RECEIVER . > Using the Subaru Select Monitor, clear the memory. Use the Subaru Select Monitor and read DTCs. | Is B1242 displayed? | Replace the keyless access CM. < Refer to KEYLESS ACCESS CM . > | Receiver has a malfunction. |
DIAGNOSTIC PROCEDURE
- When malfunction is detected in IG1 and IG2 drive circuits in the keyless access CM.
- When malfunction is detected in IG hold circuit in the keyless access CM.
Not all functions operate at IGN ON.
| CAUTION | For replacement procedure of keyless access CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK LAN SYSTEM. Inspect LAN system. < Refer to PROCEDURE , Basic Diagnostic Procedure. > | Is LAN system normal? | Go to step 2 . | Perform the inspection according to the diagnosis for LAN system. |
| 2 CHECK FUSE. Remove the fuse. | Is the fuse OK? | Go to step 3 . | Replace the fuse. When the replaced fuse is blown immediately, check the power supply circuit for short-circuited. |
| 3 CHECK HARNESS. Disconnect the keyless access CM connector. Using a tester, measure the voltage between the keyless access CM connector and chassis ground. Connector & terminal (B572) No. 2 (+) - Chassis ground (-) | Is the voltage 9.5 - 16 V? | Go to step 4 . | Check the power supply circuit. |
| 4 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground. Connector & terminal (B572) No. 11 - Chassis ground | Is the resistance less than 1 ohms? | Go to step 5 . | Repair or replace the open circuit of harness. |
| 5 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground. Connector & terminal (B572) No. 9 - Chassis ground | Is resistance 128 - 157 ohms? (20°C) | Go to step 6 . | Check IG relay 2. Go to step 7 . |
| 6 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground. Connector & terminal (i242) No. 6 - Chassis ground | Is resistance 128 - 157 ohms? (20°C) | Go to step 7 . | Check IG relay 1. Go to step 7 . |
| 7 CHECK RELAY. Perform unit inspection of IG relay 1 and IG relay 2. < Refer to CHECK RELAY , INSPECTION, Relay and Fuse. > | Is the relay OK? | Go to step 8 . | Replace the relay. < Refer to REMOVAL , IG Relay 1 (Push Button Start). > < Refer to REMOVAL , IG Relay 2 (Push Button Start). > |
| 8 CHECK KEYLESS ACCESS CM. Connect the keyless access CM connector. Using a tester, measure the voltage between the terminals of keyless access CM connector. Connector & terminal (i242) No. 6 (+) - Chassis ground (-): (B572) No. 9 (+) - Chassis ground (-) | Is the voltage 1 V or less --> 9.5 - 16 V when ACC --> IGN ON? | System is normal. It is possible that temporary poor contact occurs. | Replace the keyless access CM. < Refer to REMOVAL , Keyless Access CM. > |
DIAGNOSTIC PROCEDURE
When malfunction is detected in ACC relay drive circuit in the keyless access CM or external circuit.
Each function does not operate at the ACC position.
| CAUTION | For replacement procedure of keyless access CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK LAN SYSTEM. Inspect LAN system. | Is LAN system normal? | Go to step 2 . | Perform the inspection according to the diagnosis for LAN system. |
| 2 CHECK FUSE. Remove the fuse. | Is the fuse OK? | Go to step 3 . | Replace the fuse. When the replaced fuse is blown immediately, check the power supply circuit for short-circuited. |
| 3 CHECK HARNESS. Disconnect the keyless access CM connector. Using a tester, measure the resistance between the keyless access CM connector and chassis ground. Connector & terminal (B572) No. 2 (+) - Chassis ground (-) | Is the voltage 9.5 - 16 V? | Go to step 4 . | Check the power supply circuit. |
| 4 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground. Connector & terminal (B572) No. 11 - Chassis ground | Is the resistance less than 1 ohms? | Go to step 5 . | Repair or replace the open circuit of harness. |
| 5 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground. Connector & terminal (i242) No. 4 - Chassis ground | Is resistance 128 - 157 ohms? (20°C) | Go to step 7 . | Go to step 6 . |
| 6 CHECK RELAY. Perform inspection of ACC relay unit. < Refer to ACCESSORY RELAY (PUSH BUTTON START) . > | Is the relay OK? | Go to step 7 . | Replace the relay. |
| 7 CHECK HARNESS. Using a tester, measure the resistance between keyless access CM connectors. Connector & terminal (i242) No. 4 - (B225) No. 27: (B225) No. 25 - Chassis ground | Is the resistance less than 1 ohms? | Go to step 8 . | Repair or replace the open circuit of harness. |
| 8 CHECK KEYLESS ACCESS CM. Connect the keyless access CM connector. Using a tester, measure the voltage between keyless access CM connectors. Connector & terminal (i242) No. 4 (+) - Chassis ground (-) | Is the voltage 1 V or less --> 9.5 - 16 V when OFF --> ACC ON? | System is normal. It is possible that temporary poor contact occurs. | Replace the keyless access CM. < Refer to KEYLESS ACCESS CM . > |
DIAGNOSTIC PROCEDURE
- When malfunction is detected in engine start permission signal output circuit in the keyless access CM.
- When malfunction is detected in external engine start permission signal circuit.
Engine will not start.
| CAUTION | For replacement procedure of keyless access CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK LAN SYSTEM. Inspect LAN system. | Is LAN system normal? | Go to step 2 . | Perform the inspection according to the diagnosis for LAN system. |
| 2 CHECK FUSE. Remove the fuse. | Is the fuse OK? | Go to step 3 . | Replace the fuse. When the replaced fuse is blown immediately, check the power supply circuit for short-circuited. |
| 3 CHECK HARNESS. Disconnect the keyless access CM connector and ECM connector. Using a tester, measure the resistance between the keyless access CM connector and ECM. Connector & terminal 2.5 L model (B572) No. 7 - (B137) No. 17: 3.6 L model (B572) No. 7 - (B136) No. 16 | Is the resistance less than 1 ohms? | Go to step 4 . | Repair or replace the open circuit of harness. |
| 4 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground. Connector & terminal (B572) No. 11 - Chassis ground | Is the resistance less than 1 ohms? | Go to step 5 . | Repair or replace the open circuit of harness. |
| 5 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground. Connector & terminal (B572) No. 7 - Chassis ground | Is the resistance 10 kohms or more? | Go to step 6 . | Repair or replace the short circuit of the harness. |
| 6 CHECK KEYLESS ACCESS CM. Connect the keyless access CM connector and ECM connector. Using a tester, measure the voltage between the terminals of keyless access CM connector. Connector & terminal (B572) No. 7 (+) - (B572) No. 11 (-) | Is the voltage 2 V or less --> 9 V or more when the push button ignition switch is turned on while depressing the brake pedal with the shift position in P or N and while the key is in the passenger room? | Perform inspection according to the diagnosis of engine. < Refer to PROCEDURE , Basic Diagnostic Procedure. > | Replace the keyless access CM. < Refer to KEYLESS ACCESS CM . > |
DIAGNOSTIC PROCEDURE
When input error occurs in accessory relay cut input signal of keyless access CM.
- The accessory power supply is not cut during engine start.
- Starter rotation is slow.
| CAUTION | For replacement procedure of keyless access CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK LAN SYSTEM. Inspect LAN system. | Is LAN system normal? | Go to step 2 . | Perform the inspection according to the diagnosis for LAN system. |
| 2 CHECK HARNESS. Disconnect the keyless access CM connector and ECM connector. Using a tester, measure the resistance between the keyless access CM connector and ECM. Connector & terminal (i241) No. 28 - (B135) No. 32 | Is the resistance less than 1 ohms? | Go to step 3 . | Repair or replace the open circuit of harness. |
| 3 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground. Connector & terminal (i241) No. 28 - Chassis ground | Is the resistance 10 kohms or more? | Go to step 4 . | Repair or replace the short circuit of the harness. |
| 4 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground. Connector & terminal (B572) No. 11 - Chassis ground | Is the resistance less than 1 ohms? | Go to step 5 . | Repair or replace the open circuit of harness. |
| 5 CHECK KEYLESS ACCESS CM. Connect the keyless access CM connector and ECM connector. Using a tester, measure the voltage between terminals of the keyless access CM connector when the push button ignition switch is pressed while depressing the brake pedal, with the shift lever in the P range for model except for MT or while depressing the clutch pedal for MT model. Connector & terminal (i241) No. 28 (+) - (B572) No. 11 (-) | Is the voltage 9.5 - 16 V --> 1 V or less? | Replace the keyless access CM. < Refer to KEYLESS ACCESS CM . > | Replace the ECM. < Refer to REMOVAL , Engine Control Module (ECM). > |
DIAGNOSTIC PROCEDURE
When the water-submersion detection circuit integrated into the keyless access CM detects the water submersion.
- The power does not turn ON, or the keyless access system does not operate.
- The ignition can be turned ON, but cannot be turned OFF.
- Engine will not start.
| CAUTION | For replacement procedure of keyless access CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK LAN SYSTEM. Inspect LAN system. | Is LAN system normal? | Go to step 2 . | Perform the inspection according to the diagnosis for LAN system. |
| 2 CHECK SUBMERSION CONDITION. Check the keyless access CM and environment of equipment, and check the harness for any trace of water submersion. | Is there any trace of water submersion? | Take necessary measures against water submersion and replace the keyless access CM. < Refer to KEYLESS ACCESS CM . > | Replace the keyless access CM. < Refer to KEYLESS ACCESS CM . > |
DIAGNOSTIC PROCEDURE
When the vehicle speed signal transmitted from the VDC CM via solid line and the vehicle speed signal transmitted via CAN communication line do not match.
The steering lock cannot be released.
| CAUTION | For replacement procedure of keyless access CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK LAN SYSTEM. Inspect LAN system. < Refer to PROCEDURE , Basic Diagnostic Procedure. > | Is LAN system normal? | Go to step 2 . | Perform the inspection according to the diagnosis for LAN system. |
| 2 CHECK COMBINATION METER. Check that the speedometer is displayed normally. | Is the meter display normal? | Go to step 3 . | Check the VDC CM. < Refer to BASIC DIAGNOSTIC PROCEDURE . > |
| 3 CHECK CURRENT DATA. Confirm the current data display of keyless access system using Subaru Select Monitor. Vehicle speed signal | Is the parked state or driving state displayed normally? | Go to step 4 . | Check the VDC CM. < Refer to BASIC DIAGNOSTIC PROCEDURE . > |
| 4 CHECK FUSE. Remove the fuse. | Is the fuse OK? | Go to step 5 . | Replace the fuse. When the replaced fuse is blown immediately, check the power supply circuit for short-circuited. |
| 5 CHECK CURRENT DATA. Confirm the current data display of keyless access system using Subaru Select Monitor. {Brake CU disruption information} | Is {Normal} displayed? | Go to step 6 . | Check the VDC CM. < Refer to BASIC DIAGNOSTIC PROCEDURE . > |
| 6 CHECK HARNESS. Disconnect the keyless access CM connector. Using a tester, measure the voltage between keyless access CM connectors. Connector & terminal (B572) No. 2 (+) - Chassis ground (-) | Is the voltage 9.5 - 16 V? | Go to step 7 . | Check the power supply circuit. |
| 7 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground. Connector & terminal (B572) No. 11 - Chassis ground | Is the resistance less than 1 ohms? | Go to step 8 . | Repair or replace the open circuit of harness. |
| 8 CHECK HARNESS. Disconnect the keyless access CM connector. Disconnect the combination meter connector. Using a tester, measure the resistance between the keyless access CM connector and VDC CM connector. Connector & terminal (i242) No. 27 - (B310) No. 11 | Is the resistance less than 1 ohms? | Go to step 9 . | Repair or replace the open circuit of harness. |
| 9 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground. Connector & terminal (i242) No. 27 - Chassis ground | Is the resistance 10 kohms or more? | Go to step 10 . | Repair or replace the short circuit of the harness. |
| 10 CHECK KEYLESS ACCESS CM. Connect each connector. Using the Subaru Select Monitor, measure the waveform between the terminals of keyless access CM. Connector & terminal (i242) No. 27 - Chassis ground | Is 3.54 Hz displayed when the vehicle is driven approx. at 5 km/h? Or does the value change from 3.54 Hz when the vehicle stops? | Replace the keyless access CM. < Refer to REMOVAL , Keyless Access CM. > | Check the VDC CM. < Refer to BASIC DIAGNOSTIC PROCEDURE . > |
DIAGNOSTIC PROCEDURE
Either of the following malfunctions is detected (Vehicle speed sensor failure is detected.).
- Vehicle speed signal failure detection 1: Excessive deceleration detection
- Vehicle speed signal failure detection 2: Engine speed interlock detection
The steering lock cannot be released.
| CAUTION | For replacement procedure of keyless access CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK LAN SYSTEM. Inspect LAN system. < Refer to PROCEDURE , Basic Diagnostic Procedure. > | Is LAN system normal? | Go to step 2 . | Perform the inspection according to the diagnosis for LAN system. |
| 2 CHECK COMBINATION METER. Check that the speedometer is displayed normally. | Is the meter display normal? | Go to step 3 . | Check the VDC CM. < Refer to BASIC DIAGNOSTIC PROCEDURE . > |
| 3 CHECK CURRENT DATA. Confirm the current data display of keyless access system using Subaru Select Monitor. Vehicle speed signal | Is the parked state or driving state displayed normally? | Go to step 4 . | Check the VDC CM. < Refer to BASIC DIAGNOSTIC PROCEDURE . > |
| 4 CHECK FUSE. Remove the fuse. | Is the fuse OK? | Go to step 5 . | Replace the fuse. When the replaced fuse is blown immediately, check the power supply circuit for short-circuited. |
| 5 CHECK CURRENT DATA. Confirm the current data display of keyless access system using Subaru Select Monitor. {Brake CU disruption information} | Is {Normal} displayed? | Go to step 6 . | Check the VDC CM. < Refer to BASIC DIAGNOSTIC PROCEDURE . > |
| 6 CHECK HARNESS. Disconnect the keyless access CM connector. Using a tester, measure the voltage between keyless access CM connectors. Connector & terminal (B572) No. 2 (+) - Chassis ground (-) | Is the voltage 9.5 - 16 V? | Go to step 7 . | Check the power supply circuit. |
| 7 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground. Connector & terminal (B572) No. 11 - Chassis ground | Is the resistance less than 1 ohms? | Go to step 8 . | Repair or replace the open circuit of harness. |
| 8 CHECK HARNESS. Disconnect the keyless access CM connector. Disconnect the combination meter connector. Using a tester, measure the resistance between the keyless access CM connector and VDC CM connector. Connector & terminal (i242) No. 27 - (B310) No. 11 | Is the resistance less than 1 ohms? | Go to step 9 . | Repair or replace the open circuit of harness. |
| 9 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground. Connector & terminal (i242) No. 27 - Chassis ground | Is the resistance 10 kohms or more? | Go to step 10 . | Repair or replace the short circuit of the harness. |
| 10 CHECK KEYLESS ACCESS CM. Connect each connector. Using the Subaru Select Monitor, measure the waveform between the terminals of keyless access CM. Connector & terminal (i242) No. 27 - Chassis ground | Is 3.54 Hz displayed when the vehicle is driven approx. at 5 km/h? Or does the value change from 3.54 Hz when the vehicle stops? | Replace the keyless access CM. < Refer to REMOVAL , Keyless Access CM. > | Check the VDC CM. < Refer to BASIC DIAGNOSTIC PROCEDURE . > |
DIAGNOSTIC PROCEDURE
When the brake signal transmitted via solid line and the brake signal transmitted via CAN communication line do not match.
| CAUTION | For replacement procedure of keyless access CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK LAN SYSTEM. Inspect LAN system. < Refer to PROCEDURE , Basic Diagnostic Procedure. > | Is LAN system normal? | Go to step 2 . | Perform the inspection according to the diagnosis for LAN system. |
| 2 CHECK CURRENT DATA. Confirm the current data display of keyless access system using Subaru Select Monitor. Stop light SW | Is DTC displayed normally according to the brake pedal operation? | Go to step 3 . | Check the stop light switch circuit. |
| 3 CHECK CURRENT DATA. Confirm the current data display of body integrated unit using Subaru Select Monitor. Stop light SW | Is DTC displayed normally according to the brake pedal operation? | Go to step 4 . | Check the body integrated unit and the stop light switch circuit. |
| 4 CHECK FUSE. Remove the fuse. | Is the fuse OK? | Go to step 5 . | Replace the fuse. When the replaced fuse is blown immediately, check the power supply circuit for short-circuited. |
| 5 CHECK HARNESS. Disconnect the keyless access CM connector. Using a tester, measure the voltage between keyless access CM connectors. Connector & terminal (B572) No. 2 (+) - Chassis ground (-) | Is the voltage 9.5 - 16 V? | Go to step 6 . | Check the power supply circuit. |
| 6 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground. Connector & terminal (B572) No. 11 - Chassis ground | Is the resistance less than 1 ohms? | Go to step 7 . | Repair or replace the open circuit of harness. |
| 7 CHECK HARNESS. Disconnect the stop light switch connector. Using a tester, measure the resistance between the keyless access CM connector and stop light switch connector. Connector & terminal (B572) No. 18 - (B65) No. 3 | Is the resistance less than 1 ohms? | Go to step 8 . | Repair or replace the open circuit of harness. |
| 8 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground. Connector & terminal (B572) No. 18 - Chassis ground | Is the resistance 10 kohms or more? | Go to step 9 . | Repair or replace the short circuit of the harness. |
| 9 CHECK HARNESS. Using a tester, measure the voltage between the keyless access CM connector and chassis ground when the brake pedal is depressed. Connector & terminal (B572) No. 18 (+) - Chassis ground (-) | Does the voltage change as follows? Brake pedal not depressed: 1 V or less --> Brake pedal depressed: 11 - 14 V | Replace the keyless access CM. < Refer to REMOVAL , Keyless Access CM. > | Check the power supply circuit of stop light switch. |
DIAGNOSTIC PROCEDURE
When the steering lock position signal transmitted from the steering lock CM via solid line and the steering lock position signal transmitted via LIN communication system do not match.
- There are conditions when the steering lock is not released.
- Engine will not start.
| CAUTION | For replacement procedure of keyless access CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK LAN SYSTEM. Inspect LAN system. | Is LAN system normal? | Go to step 2 . | Perform the inspection according to the diagnosis for LAN system. |
| 2 CHECK CURRENT DATA. Confirm the current data display of keyless access system using Subaru Select Monitor. Steering Unlock Switch | Can the data be read normally? | Go to step 3 . | Replace the steering lock CM. < Refer to STEERING LOCK CM . > |
| 3 CHECK FUSE. Remove the fuse. | Is the fuse OK? | Go to step 4 . | Replace the fuse. When the replaced fuse is blown immediately, check the power supply circuit for short-circuited. |
| 4 CHECK HARNESS. Disconnect the keyless access CM connector. Using a tester, measure the voltage between keyless access CM connectors. Connector & terminal (B572) No. 2 (+) - Chassis ground (-) | Is the voltage 9.5 - 16 V? | Go to step 5 . | Check the power supply circuit. |
| 5 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground. Connector & terminal (B572) No. 11 - Chassis ground | Is the resistance less than 1 ohms? | Go to step 6 . | Repair or replace the open circuit of harness. |
| 6 CHECK HARNESS. Using a tester, measure the resistance between the steering lock CM connector and chassis ground. Connector & terminal (B424) No. 4 - Chassis ground | Does the following occur? Steering lock: 10 kohms or more --> Steering unlock: less than 1 ohms | Go to step 7 . | Replace the steering lock CM. < Refer to STEERING LOCK CM . > |
| 7 CHECK HARNESS. Disconnect the keyless access CM connector. Disconnect the steering lock CM connector. Using a tester, measure the resistance between the keyless access CM connector and steering lock CM. Connector & terminal (i242) No. 26 - (B424) No. 4 | Is the resistance less than 1 ohms? | Go to step 8 . | Repair or replace the open circuit of harness. |
| 8 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground. Connector & terminal (i242) No. 26 - Chassis ground | Is the resistance 10 kohms or more? | Replace the keyless access CM. < Refer to KEYLESS ACCESS CM . > | Repair or replace the short circuit of the harness. |
DIAGNOSTIC PROCEDURE
When the engine speed signal transmitted from the ECM via solid line and the engine speed signal transmitted via CAN communication line do not match.
Engine will not start.
| CAUTION | For replacement procedure of keyless access CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK LAN SYSTEM. Inspect LAN system. | Is LAN system normal? | Go to step 2 . | Perform the inspection according to the diagnosis for LAN system. |
| 2 CHECK CURRENT DATA. Confirm the current data display of keyless access system using Subaru Select Monitor. {Engine Speed} | Can the data be read normally? | Perform the diagnosis for the engine. < Refer to PROCEDURE , Basic Diagnostic Procedure. > | Go to step 3 . |
| 3 CHECK FUSE. Remove the fuse. | Is the fuse OK? | Go to step 4 . | Replace the fuse. When the replaced fuse is blown immediately, check the power supply circuit for short-circuited. |
| 4 CHECK HARNESS. Disconnect the keyless access CM connector. Using a tester, measure the voltage between keyless access CM connectors. Connector & terminal (B572) No. 2 (+) - Chassis ground (-) | Is the voltage 9.5 - 16 V? | Go to step 5 . | Check the power supply circuit. |
| 5 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground. Connector & terminal (B572) No. 11 - Chassis ground | Is the resistance less than 1 ohms? | Go to step 6 . | Repair or replace the open circuit of harness. |
| 6 CHECK HARNESS. Disconnect the keyless access CM connector. Disconnect the ECM connector. Using a tester, measure the resistance between the keyless access CM connector and ECM connector. Connector & terminal (B572) No. 17 - (B135) No. 15 | Is the resistance less than 1 ohms? | Go to step 7 . | Repair or replace the open circuit of harness. |
| 7 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground. Connector & terminal (B572) No. 17 - Chassis ground | Is the resistance 10 kohms or more? | Go to step 8 . | Repair or replace the open circuit of harness. |
| 8 CHECK HARNESS. Connect the keyless access CM connector and ECM connector. Using the Subaru Select Monitor, measure the waveform between the keyless access CM connector and chassis ground. Connector & terminal (B572) No. 17 - Chassis ground | Does the pulse stop when the engine is stopped, and does the pulse generate when the engine is started? | Replace the keyless access CM. < Refer to KEYLESS ACCESS CM . > | Perform the diagnosis for the engine. < Refer to PROCEDURE , Basic Diagnostic Procedure. > |
DIAGNOSTIC PROCEDURE
When the keyless access CM does not respond to engine start even when the remote control engine starter is ON, or when there is a code mismatch.
Remote engine starter does not function.
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK CONNECTOR. Check the connection of remote engine starter CM. | Is there any fault? | Repair the connector, or replace the remote engine starter CM. | Go to step 2 . |
| 2 CHECK CAN COMMUNICATION CIRCUIT. Check CAN communication circuit. < Refer to 57 - 63 ohms (REMOTE ENGINE START) , INSPECTION, CAN Communication Circuit Check. > | Is there any fault? | Repair according to the CAN communication circuit inspection. | Go to step 3 . |
| 3 REGISTER THE REMOTE ENGINE STARTER. Register the remote engine starter using the Subaru Select Monitor. (Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER".) Clear the DTC. Start the engine using the remote engine starter. Read the DTC again. | Is DTC B2779 detected? | Replace the remote engine starter CM. | System is normal. It is possible that temporary poor contact occurs. |
DIAGNOSTIC PROCEDURE
- When malfunction is detected in lock/unlock position detection sensor.
- When the open or short circuit in the steering lock motor drive circuit is detected.
- The steering lock cannot be released.
- Engine will not start.
| CAUTION | For replacement procedure of steering lock CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
Note. When all ECMs connected to collation system LIN bus cannot communicate with the keyless access CM, DTC B2785 is output.
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK DTC. Use the Subaru Select Monitor and read DTCs. | Is B2785 displayed? | Perform the diagnosis according to DTC. | Replace the steering lock CM. < Refer to STEERING LOCK CM . > |
DIAGNOSTIC PROCEDURE
When the open or short circuit in the steering lock motor power supply circuit is detected.
- The steering lock cannot be released.
- Engine will not start.
| CAUTION | For replacement procedure of keyless access CM and steering lock CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK STEERING LOCK CM. Disconnect the steering lock CM connector. Using a tester, measure the resistance between the steering lock CM connector and chassis ground. Connector & terminal (B424) No. 1 - Chassis ground | Is the resistance less than 1 ohms? | Go to step 2 . | Repair or replace the open circuit of harness. |
| 2 CHECK CURRENT DATA. Connect the steering lock CM connector. ACC OFF, IGN OFF, shift position in P Using a tester, open the door, and measure the voltage between terminals of steering CM connector when the steering lock motor is driven. Connector & terminal (B424) No. 3 (+) - (B424) No. 1 (-) | Does the voltage change as follows? Steering lock motor in operation: 1 V or less --> Steering lock motor is stopped: 11 - 14 V | Go to step 3 . | Go to step 4 . |
| 3 CHECK DTC. Turn the ignition switch to ON. Using the Subaru Select Monitor, clear the memory. Turn the ignition switch to OFF. Disconnect the battery ground cable and reconnect it, and then clear the abnormal information displayed on the data monitor. Turn the ignition switch to ON. Use the Subaru Select Monitor and read DTCs. | Is B2782 displayed? | Replace the steering lock CM. < Refer to STEERING LOCK CM . > | System is normal. It is possible that temporary poor contact occurs. |
| 4 CHECK CONNECTOR. Disconnect the steering lock CM connector. Disconnect the keyless access CM connector. | Are connectors normal? | Go to step 5 . | Repair or replace the connector. |
| 5 CHECK HARNESS. Using a tester, measure the resistance between steering lock CM connector and keyless access CM connector. Connector & terminal (i242) No. 29 - (B424) No. 3 | Is the resistance less than 1 ohms? | Go to step 6 . | Repair or replace the open circuit of harness. |
| 6 CHECK HARNESS. Using a tester, measure the resistance between steering lock CM connector and chassis ground, and between keyless access CM connector and chassis ground. Connector & terminal (B424) No. 3 - Chassis ground: (i242) No. 29 - Chassis ground | Is the resistance 10 kohms or more? | Replace the keyless access CM. < Refer to KEYLESS ACCESS CM . > | Repair or replace the short circuit of the harness. |
DIAGNOSTIC PROCEDURE
When open or short circuit occurs in the antenna coil.
The keyless access function may not be operable.
| CAUTION | For replacement procedure of keyless access CM and steering lock CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK STEERING LOCK CM. Disconnect the push button ignition switch connector. Disconnect the keyless access CM connector. Using the tester, measure the resistance between terminals. Connector & terminal (i150) No. 14 - (i242) No. 1: (i150) No. 9 - (i242) No. 9: (i150) No. 10 - (i242) No. 7: (i150) No. 8 - (i242) No. 24 | Is the resistance less than 1 ohms? | Go to step 2 . | Repair or replace the open circuit of harness. |
| 2 CHECK HARNESS. Using the tester, measure the resistance between terminals. Connector & terminal (i150) No. 14 - Chassis ground: (i150) No. 9 - Chassis ground: (i150) No. 10 - Chassis ground | Is the resistance 10 kohms or more? | Go to step 3 . | Repair or replace the short circuit of the harness. |
| 3 CHECK PUSH BUTTON IGNITION SWITCH. Replace the push button ignition switch. < Refer to PUSH BUTTON IGNITION SWITCH . > Using the Subaru Select Monitor, clear the memory. Use the Subaru Select Monitor and read DTCs. | Is B2784 displayed? | Replace the keyless access CM. < Refer to KEYLESS ACCESS CM . > | Malfunction occurred in the push button ignition switch. |
DIAGNOSTIC PROCEDURE
When the keyless access CM detected the collation system LIN bus communication error three times in a row.
The keyless access function may not be operable.
| CAUTION | For replacement procedure of keyless access CM and steering lock CM or ID code box, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK DTC. Use the Subaru Select Monitor and read DTCs. | Is B2785 displayed? | Go to step 2 . | Check the connector. |
| 2 CHECK HARNESS. Disconnect the keyless access CM connector. Disconnect the steering lock CM connector. Disconnect the ID code box connector. (with ID code box) Using the tester, measure the resistance between terminals. Connector & terminal (i242) No. 17 - (B424) No. 5: (B422) No. 5 - Chassis ground: (with ID code box) | Is the resistance less than 1 ohms? | Go to step 3 . | Repair or replace the open circuit of harness. |
| 3 CHECK HARNESS. Using the tester, measure the resistance between terminals. Connector & terminal (B424) No. 5 - Chassis ground: (i242) No. 17 - Chassis ground: (B422) No. 5 - Chassis ground: (with ID code box) | Is the resistance 10 kohms or more? | Go to step 4 . | Repair or replace the short circuit of the harness. |
| 4 CHECK KEYLESS ACCESS CM. Connect the keyless access CM connector only. Use the Subaru Select Monitor and read DTCs. | Is B2785 displayed? | Replace the keyless access CM. < Refer to REMOVAL , Keyless Access CM. > | Go to step 5 . |
| 5 CHECK ID CODE BOX. NOTE: For model without ID code box, go to the next step. Connect only the ID code box. Use the Subaru Select Monitor and read DTCs. | Is B2785 displayed? | Replace the ID code box. | Go to step 6 . |
| 6 CHECK STEERING LOCK CM. Replace the steering lock CM, and then connect it. < Refer to REMOVAL , Steering Lock CM. > Using the Subaru Select Monitor, clear the memory. Use the Subaru Select Monitor and read DTCs. | Is B2785 displayed? | Replace the keyless access CM. < Refer to REMOVAL , Keyless Access CM. > | Malfunction occurred in the steering lock CM. |
| NOTE |
|---|
| For model without ID code box, go to the next step. |
DIAGNOSTIC PROCEDURE
When communication between keyless access CM and steering lock CM is interrupted for a set amount of time.
The steering lock cannot be released.
| CAUTION | For replacement procedure of keyless access CM and steering lock CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK DTC. Use the Subaru Select Monitor and read DTCs. | Is a DTC other than B2786 displayed? | Perform the diagnosis according to DTC. | Go to step 2 . |
| 2 CHECK HARNESS. Disconnect the keyless access CM connector. Disconnect the steering lock CM connector. Using the tester, measure the resistance between terminals. Connector & terminal (i242) No. 17 - (B424) No. 5 | Is the resistance less than 1 ohms? | Go to step 3 . | Repair or replace the open circuit of harness. |
| 3 CHECK HARNESS. Using the tester, measure the resistance between terminals. Connector & terminal (B424) No. 5 - Chassis ground: (i242) No. 17 - Chassis ground | Is the resistance 10 kohms or more? | Go to step 4 . | Repair or replace the short circuit of the harness. |
| 4 CHECK HARNESS. Using a tester, measure the resistance between the steering lock CM connector and chassis ground. Connector & terminal (B424) No. 1 - Chassis ground | Is the resistance less than 1 ohms? | Go to step 5 . | Repair or replace the open circuit of harness. |
| 5 CHECK HARNESS. Turn the ignition switch to ON. Using a tester, measure the voltage between the steering lock CM connector and chassis ground. Connector & terminal (B424) No. 6 (+) - Chassis ground (-): (B424) No. 7 (+) - Chassis ground (-) | Is the voltage 11 - 14 V? | Go to step 6 . | Repair or replace the open circuit of harness. |
| 6 CHECK STEERING LOCK CM. Turn the ignition switch to ON. Replace the steering lock CM. < Refer to STEERING LOCK CM . > Using the Subaru Select Monitor, clear the memory. Use the Subaru Select Monitor and read DTCs. | Is B2786 displayed? | Replace the keyless access CM. < Refer to KEYLESS ACCESS CM . > | Malfunction occurred in the steering lock CM. |
DIAGNOSTIC PROCEDURE
When mismatch occurs in the IG1 input of the steering lock CM for both LIN communication line input (IG1 input value of keyless access CM) and solid line input.
The steering lock cannot be released.
| CAUTION | For replacement procedure of steering lock CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK FUSE. Remove the fuse. | Is the fuse OK? | Go to step 2 . | Replace the fuse. When the replaced fuse is blown immediately, check the power supply circuit for short-circuited. |
| 2 CHECK CURRENT DATA. Confirm the current data display of keyless access system using Subaru Select Monitor. {IGN SW} | Is the display normal according to the ignition switch operation? | Go to step 3 . | Go to step 5 . |
| 3 CHECK HARNESS. Disconnect the steering lock CM connector. Using a tester, measure the resistance between the steering lock CM connector and chassis ground. Connector & terminal (B424) No. 1 - Chassis ground | Is the resistance less than 1 ohms? | Go to step 4 . | Repair or replace the open circuit of harness. |
| 4 CHECK HARNESS. Connect the steering lock CM connector. Using the tester, measure the voltage between terminals. Connector & terminal (B424) No. 6 (+) - (B424) No. 1 (-) | Is the voltage 11 - 14 V with IG ON? Is the voltage less than 1 V with IG OFF? | Replace the steering lock CM. < Refer to REMOVAL , Steering Lock CM. > | Check the DC power supply circuit. |
| 5 CHECK HARNESS. Using a tester, measure the voltage between the keyless access CM connector and chassis ground. Connector & terminal (i242) No. 5 (+) - Chassis ground (-) | Is the voltage 11 - 14 V with IG ON? Is the voltage less than 1 V with IG OFF? | Replace the keyless access CM. < Refer to REMOVAL , Keyless Access CM. > | Check the DC power supply circuit. |
DIAGNOSTIC PROCEDURE
- When communication between keyless access CM and ID code box is interrupted for a set amount of time.
- Open or short circuit in the wiring harness between keyless access CM and ID code box
Engine will not start.
| CAUTION | For replacement procedure of keyless access CM and ID code box, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK DTC. Use the Subaru Select Monitor and read DTCs. | Is B2789 displayed? | Go to step 2 . | Check the connector. |
| 2 CHECK HARNESS. Disconnect the keyless access CM connector. Disconnect the steering lock CM connector. Disconnect the ID code box connector. Using the tester, measure the resistance between terminals. Connector & terminal (i242) No. 17 - (B422) No. 2 | Is the resistance less than 1 ohms? | Go to step 3 . | Repair or replace the open circuit of harness. |
| 3 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground, and between ID code box connector and chassis ground. Connector & terminal (i242) No. 17 - Chassis ground: (B422) No. 2 - Chassis ground | Is the resistance 10 kohms or more? | Go to step 4 . | Repair or replace the short circuit of the harness. |
| 4 CHECK HARNESS. Using a tester, measure the resistance between ID code box connector and chassis ground. Connector & terminal (B422) No. 5 - Chassis ground | Is the resistance less than 1 ohms? | Go to step 5 . | Repair or replace the open circuit of harness. |
| 5 CHECK HARNESS. Using a tester, measure the voltage between ID code box connector and chassis ground. Connector & terminal (B422) No. 1 (+) - Chassis ground (-) | Is the voltage 11 - 14 V? | Go to step 6 . | Repair or replace the open circuit of harness. |
| 6 CHECK ID CODE BOX. Replace the ID code box. < Refer to ID CODE BOX . > Using the Subaru Select Monitor, clear the memory. Use the Subaru Select Monitor and read DTCs. | Is B2789 displayed? | Replace the keyless access CM. < Refer to KEYLESS ACCESS CM . > | ID code box has an error. |
DIAGNOSTIC PROCEDURE
When the power supply circuit of the push button ignition switch is shorted to ground.
- Engine does not start even the smart key is held above it.
- Key cannot be registered even the smart key is held above it.
| CAUTION | For replacement procedure of keyless access CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
DIAGNOSTIC PROCEDURE Step Check Yes No 1 CHECK KEYLESS ACCESS CM. Turn the ignition switch to OFF. Take the access key out of the passenger room. Push the push button ignition switch. Within 30 seconds, use oscilloscope to measure the waveform between connectors. Connector & terminal (i150) No. 14 - (i150) No. 8: Is the waveform shown in the left column displayed? Go to step 2 . Replace the push button ignition switch. < Refer to PUSH BUTTON IGNITION SWITCH . > 2 CHECK HARNESS. Disconnect the keyless access CM connector. Disconnect the push button ignition switch connector. Using the tester, measure the resistance between terminals. Connector & terminal (i150) No. 14 - (i242) No. 1: (i150) No. 8 - (i242) No. 24: Is the resistance less than 1 ohms? Go to step 3 . Repair or replace the open circuit of harness. 3 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground. Connector & terminal (i242) No. 1 - Chassis ground: (i242) No. 24 - Chassis ground: Is the resistance 10 kohms or more? Go to step 4 . Repair or replace the short circuit of the harness. 4 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground. Connector & terminal (i242) No. 24 - Chassis ground: Is the resistance 1 ohms or less? Replace the keyless access CM. < Refer to KEYLESS ACCESS CM . > Repair or replace the harness
- When ID code box setting is set to OFF, ID code box ON input is detected.
- When ID code box setting is set to OFF, ID code box LIN signal is received.
Engine will not start.
| CAUTION | For replacement procedure of keyless access CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK DTC. Turn the ignition switch to OFF. Using the Subaru Select Monitor, clear the keyless access system memory. Turn the ignition switch to OFF --> ON. Use the Subaru Select Monitor and read DTCs. | Is B278D displayed? | Go to step 2 . | System is normal. It is possible that temporary poor contact occurs. |
| 2 CHECK HARNESS. Disconnect the keyless access CM connector. Measure the resistance between keyless access CM connector and chassis ground. Connector & terminal (i241) No. 15 - Chassis ground | With ID code box: Is the resistance 1 ohms or less? Without ID code box: Is the resistance 10 kohms or more? Or is the terminal (i242) No. 15 disconnected? | Replace the keyless access CM. < Refer to KEYLESS ACCESS CM . > | Repair or replace the short circuit of the harness. |
DIAGNOSTIC PROCEDURE
An error has occurred inside the ID code box.
Engine will not start.
| CAUTION | For replacement procedure of ID code box, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK DTC. Turn the ignition switch to OFF. Using the Subaru Select Monitor, clear the keyless access system memory. Turn the ignition switch to OFF --> ON. Register the ID code box. Use the Subaru Select Monitor and read DTCs. | Is B2790 displayed? | Replace the ID code box. < Refer to ID CODE BOX . > | System is normal. It is possible that temporary poor contact occurs. |
DIAGNOSTIC PROCEDURE
When open circuit occurs in the harness between keyless access CM and front interior antenna.
Keyless access system does not function. (when the access key is in the front area of the passenger room)
| CAUTION | For replacement procedure of keyless access CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK LAN SYSTEM. Inspect LAN system. | Is LAN system normal? | Go to step 2 . | Perform the inspection according to the diagnosis for LAN system. |
| 2 CHECK CONNECTOR. Disconnect the keyless access CM connector. Disconnect the front interior antenna connector. | Is the connector OK? | Go to step 3 . | Repair or replace the connector. |
| 3 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and front interior antenna connector, and between front interior antenna connector and chassis ground. Connector & terminal (i242) No. 3 - (i25) No. 1: (i242) No. 2 - (i25) No. 3: (B572) No. 11 - Chassis ground | Is the resistance less than 1 ohms? | Go to step 4 . | Repair or replace the open circuit of harness. |
| 4 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground, and between front interior antenna connector and chassis ground. Connector & terminal (i242) No. 3 - Chassis ground: (i25) No. 1 - Chassis ground: (i242) No. 2 - Chassis ground: (i25) No. 3 - Chassis ground | Is the resistance 10 kohms or more? | Go to step 5 . | Repair or replace the short circuit of the harness. |
| 5 CHECK KEYLESS ACCESS CM. Connect the keyless access CM connector. Use an oscilloscope, measure the waveform between terminals with ignition switch OFF, all doors closed and access key not in passenger room. Connector & terminal (i242) No. 3 - (B572) No. 11: (i242) No. 2 - (B572) No. 11 | Does pulse output change from pulse output OFF --> pulse output ON by operating the front lock button? | Go to step 6 . | Replace the keyless access CM. < Refer to KEYLESS ACCESS CM . > |
| 6 CHECK FRONT INTERIOR ANTENNA. Replace the front interior antenna. < Refer to KEYLESS ACCESS INDOOR ANTENNA . > Read DTC using the Subaru Select Monitor. | Is B27A5 displayed? | Replace the keyless access CM. < Refer to KEYLESS ACCESS CM . > | Malfunction occurred in the front interior antenna. |
DIAGNOSTIC PROCEDURE
When open circuit occurs in the harness between keyless access CM and center interior antenna.
Keyless access system does not function. (when the access key is in the rear area of the passenger room (near the seat))
| CAUTION | For replacement procedure of keyless access CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK LAN SYSTEM. Inspect LAN system. | Is LAN system normal? | Go to step 2 . | Perform the inspection according to the diagnosis for LAN system. |
| 2 CHECK CONNECTOR. Disconnect the keyless access CM connector. Disconnect the center interior antenna connector. | Is the connector OK? | Go to step 3 . | Repair or replace the connector. |
| 3 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and the center interior antenna connector and chassis ground. Connector & terminal (i241) No. 11 - (R298) No. 1: (i241) No. 10 - (R298) No. 3: (B572) No. 11 - Chassis ground | Is the resistance less than 1 ohms? | Go to step 4 . | Repair or replace the open circuit of harness. |
| 4 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground, and between center interior antenna connector and chassis ground. Connector & terminal (i241) No. 11 - Chassis ground: (i241) No. 10 - Chassis ground: (R298) No. 1 - Chassis ground: (R298) No. 3 - Chassis ground | Is the resistance 10 kohms or more? | Go to step 5 . | Repair or replace the short circuit of the harness. |
| 5 CHECK KEYLESS ACCESS CM. Connect the keyless access CM connector. Use an oscilloscope, measure the waveform between terminals with ignition switch OFF, all doors closed and access key not in passenger room. Connector & terminal (i241) No. 10 - (B572) No. 11: (i241) No. 11 - (B572) No. 11 | Does pulse output change from pulse output OFF --> pulse output ON by operating the front lock button? | Go to step 6 . | Replace the keyless access CM. < Refer to KEYLESS ACCESS CM . > |
| 6 CHECK CENTER INTERIOR ANTENNA. Replace the center interior antenna. < Refer to KEYLESS ACCESS INDOOR ANTENNA . > Read DTC using the Subaru Select Monitor. | Is B27A6 displayed? | Replace the keyless access CM. < Refer to KEYLESS ACCESS CM . > | Malfunction occurred in the center interior antenna. |
DIAGNOSTIC PROCEDURE
When open circuit occurs in the harness between keyless access CM and rear interior antenna.
Keyless access system does not function. (when the access key is in the trunk/rear gate (luggage))
| CAUTION | For replacement procedure of keyless access CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK LAN SYSTEM. Inspect LAN system. | Is LAN system normal? | Go to step 2 . | Perform the inspection according to the diagnosis for LAN system. |
| 2 CHECK CONNECTOR. Disconnect the keyless access CM connector. Disconnect the rear interior antenna connector. | Is the connector OK? | Go to step 3 . | Repair or replace the connector. |
| 3 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and rear interior antenna connector, and between rear interior antenna connector and chassis ground. Connector & terminal (i241) No. 8 - (R297) No. 3: (i241) No. 9 - (R297) No. 1: (B572) No. 11 - Chassis ground | Is the resistance less than 1 ohms? | Go to step 4 . | Repair or replace the open circuit of harness. |
| 4 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground, and between rear interior antenna connector and chassis ground. Connector & terminal (i241) No. 8 - Chassis ground: (i241) No. 9 - Chassis ground: (R297) No. 1 - Chassis ground: (R297) No. 3 - Chassis ground | Is the resistance 10 kohms or more? | Go to step 5 . | Repair or replace the short circuit of the harness. |
| 5 CHECK KEYLESS ACCESS CM. Connect the keyless access CM connector. Use an oscilloscope, measure the waveform between terminals with ignition switch OFF, all doors closed and access key not in passenger room. Connector & terminal (i241) No. 8 - (B572) No. 11: (i241) No. 9 - (B572) No. 11 | Does pulse output change from pulse output OFF --> pulse output ON by operating the front lock button? | Go to step 6 . | Replace the keyless access CM. < Refer to KEYLESS ACCESS CM . > |
| 6 CHECK REAR INTERIOR ANTENNA. Replace the rear interior antenna. < Refer to KEYLESS ACCESS INDOOR ANTENNA . > Read DTC using the Subaru Select Monitor. | Is B27A7 displayed? | Replace the keyless access CM. < Refer to KEYLESS ACCESS CM . > | Malfunction occurred in the rear interior antenna. |
DIAGNOSTIC PROCEDURE
When open circuit occurs in the harness between keyless access CM and rear exterior antenna.
Keyless access system does not function.
| CAUTION | For replacement procedure of keyless access CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK LAN SYSTEM. Inspect LAN system. | Is LAN system normal? | Go to step 2 . | Perform the inspection according to the diagnosis for LAN system. |
| 2 CHECK CONNECTOR. Disconnect the keyless access CM connector. Disconnect the rear exterior antenna connector. | Is the connector OK? | Go to step 3 . | Repair or replace the connector. |
| 3 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and rear exterior antenna connector, and between rear exterior antenna connector and chassis ground. Connector & terminal (i241) No. 2 - (D77) No. 1: (i241) No. 1 - (D77) No. 2 | Is the resistance less than 1 ohms? | Go to step 4 . | Repair or replace the open circuit of harness. |
| 4 CHECK HARNESS. Using a tester, measure the resistance between the keyless access CM connector and chassis ground, and between rear exterior antenna connector and chassis ground. Connector & terminal (i241) No. 2 - Chassis ground: (i241) No. 1 - Chassis ground: (D77) No. 1 - Chassis ground: (D77) No. 2 - Chassis ground | Is the resistance 10 kohms or more? | Go to step 5 . | Repair or replace the short circuit of the harness. |
| 5 CHECK REAR EXTERIOR ANTENNA. Remove the rear exterior antenna. Using a tester, measure the resistance between rear exterior antenna connectors. Connector & terminal (D77) No. 1 - No. 2 | Is the resistance less than 1 ohms? | Go to step 6 . | Replace the rear exterior antenna. < Refer to KEYLESS ACCESS OUTDOOR ANTENNA . > |
| 6 CHECK KEYLESS ACCESS CM. Replace the keyless access CM. < Refer to KEYLESS ACCESS CM . > Read DTC using the Subaru Select Monitor. | Is B27A8 displayed? | Replace the rear exterior antenna. < Refer to KEYLESS ACCESS OUTDOOR ANTENNA . > | Malfunction occurred in the keyless access CM. |
DIAGNOSTIC PROCEDURE
Incompatibility of reference code between keyless access CM (model without ID code box) or ID code box (model with ID code box) and ECM occurs.
Engine will not start.
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK ECM. Perform ECM registration. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". | Is ECM registration finished? And does the engine start? | System is normal. | Go to step 2 . |
| 2 REPLACE ECM. Install the ECM from other normal operating vehicle (with push button start) which use same ECM to the vehicle to be diagnosed. Perform ECM registration. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". | Is ECM registration finished? And does the engine start? | Replace the ECM. < Refer to REMOVAL , Engine Control Module (ECM). > Install the ECM from other vehicle to the original vehicle. | Replace Keyless access CM (model without ID code box), < Refer to KEYLESS ACCESS CM . > or replace ID code box (model with ID code box). < Refer to REMOVAL , ID Code Box. > |
DIAGNOSTIC PROCEDURE
Communication error between keyless access CM and ECM
Engine will not start.
Communication error between ID code box and ECM
Engine will not start.
- ECM malfunctioning
- When inaccessible to ROM in ECM during registration.
| Step | Check | Yes | No |
|---|---|---|---|
| 1 PERFORM ECM REGISTRATION. Perform ECM registration. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". | Is ECM registration complete? | Make sure that the engine can start. This completes the work. | Go to step 2 . |
| 2 PERFORM ECM REGISTRATION. Perform ECM registration. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". | Is ECM registration complete? | Make sure that the engine can start. This completes the work. | Go to step 3 . |
| 3 PERFORM ECM REGISTRATION. Perform ECM registration. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". | Is ECM registration complete? | Make sure that the engine can start. This completes the work. | Replace the ECM. < Refer to REMOVAL , Engine Control Module (ECM). > |
DIAGNOSTIC PROCEDURE
- Defective keyless access CM
- When inaccessible to ROM in keyless access CM.
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK DTC. Turn the ignition switch to ON. Perform the clear memory operation of ECM. Turn the ignition switch to OFF. Remove and install the battery. Turn the ignition switch to ON. After 5 seconds or more, read DTC. | Is P1577 displayed? | Replace the keyless access CM. < Refer to KEYLESS ACCESS CM . > | System is normal. |
DIAGNOSTIC PROCEDURE
- ID code box malfunction
- When inaccessible to ROM in ID code box.
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK DTC. Turn the ignition switch to ON. Perform the clear memory operation of ECM. Turn the ignition switch to OFF. Register the ID code box. Read the DTC again. | Is P1577 displayed? | Replace the ID code box. < Refer to ID CODE BOX . > | System is normal. |