PROCEDURE
| CAUTION | Subaru Select Monitor is required for reading DTC, performing diagnosis, reading current data, customizing and active test (compulsory drive). Remove foreign matter (dust, water, oil, etc.) from each control module connector during removal and installation. For model with immobilizer, registration of immobilizer may be needed after the replacement of controller etc. For detailed procedure, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
Note. To check harness for open or short circuits, shake the suspected trouble spot or connector. Check List for Interview < Refer to CHECK LIST FOR INTERVIEW . >
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK PRE-INSPECTION. Ask the customer when and how the trouble occurred using the interview check list. < Refer to CHECK LIST FOR INTERVIEW . > | Did you interview the customer? | Go to step 2 . | Interview the customer. |
| 2 BASIC INSPECTION (CAN DIAGNOSTIC IS NOT USED). Check components which might affect CAN communication problem. < Refer to INSPECTION WITHOUT USING CAN DIAGNOSTIC , INSPECTION, General Description. > | Is the component that might affect CAN communication problem normal? | Go to step 3 . | Repair or replace each component. |
| 3 CHECK COMMUNICATION FOR INITIALIZING. Communicate with the all systems by connecting the Subaru Select Monitor. | Is the communication for initializing finished for all modules? | Go to step 4 . | Check the error of communication for initializing. < Refer to COMMUNICATION FOR INITIALIZING IMPOSSIBLE , Subaru Select Monitor. > |
| 4 BASIC INSPECTION (CAN DIAGNOSTIC IS USED). Check components which might affect CAN communication problem. < Refer to INSPECTION USING CAN DIAGNOSTIC , INSPECTION, General Description. > | Is the component that might affect CAN communication problem normal? | Go to step 5 . | Repair or replace each component. |
| 5 CHECK DTC. Start the engine and read all DTCs. NOTE: When the engine does not start, perform the diagnosis for the engine start malfunction. < Refer to DIAGNOSTICS FOR ENGINE STARTING FAILURE . > Record all DTCs and freeze frame data. | Is DTC U**** displayed on Subaru Select Monitor? | Go to step 6 . | Go to step 7 . |
| 6 CHECK DTC. Perform the inspection using the DTC check sheet. < Refer to CHECK USING THE DTC CHECK SHEET , LIST, List of Diagnostic Trouble Code (DTC). > Using the Subaru Select Monitor, read all DTCs. | Is DTC U**** displayed on Subaru Select Monitor? | Go to step 8 . | Go to step 7 . |
| 7 PERFORM GENERAL DIAGNOSTICS. Inspect using the "General Diagnostic Table". < Refer to GENERAL DIAGNOSTIC TABLE . > | Is result of inspection OK? | LAN system is normal. | Go to step 8 . |
| 8 PERFORM DIAGNOSIS. Correct the cause of trouble. Perform the Clear Memory Mode. < Refer to OPERATION , Clear Memory Mode. > Read the DTC. < Refer to OPERATION , Read Diagnostic Trouble Code (DTC). > | Is DTC displayed on Subaru Select Monitor? | Repeat step 8 until DTC is not shown. | Finish the diagnosis. |
| NOTE |
|---|
| When the engine does not start, perform the diagnosis for the engine start malfunction. < Refer to DIAGNOSTICS FOR ENGINE STARTING FAILURE . > |
CHECK
Inspect the following item about the vehicle's state.
Scheme 21
Scheme 22
SUPPLEMENTAL RESTRAINT SYSTEM "AIRBAG"
Airbag system wiring harness is routed near the body integrated unit and twisted pair line.
| CAUTION | Do not use the electrical test equipment on all airbag system wiring harnesses and connectors. Be careful not to damage the airbag system wiring harness when servicing the body integrated unit and LAN system. |
Scheme 23
Scheme 24
- Bus line of LAN system is twisted pair line. Be careful not to by-pass or partly unbind the twisted pair line.
- Do not make clearance between bus lines (CAN High, CAN Low).
- Difference of bus line length should be within 10 cm (3.94 in).
- Fray near the connector should be within 8 cm (3.14 in).
- If the characteristics of the twisted pair line are changed, it may extremely weaken against noise.
- When repairing the harness, connect the wires using soldering and protect it with insulating tape etc.
GENERAL TOOL
| TOOL NAME | REMARKS |
|---|---|
| Circuit tester | Used for measuring resistance, voltage and current. |
Scheme 25
EXAMPLE OF WRITING FOR THE CHECK SHEET OF COMMUNICATION FOR INITIALIZING
When (1) is open
Scheme 26
When (2) is open
Scheme 27
When (3) is open
Scheme 28
When either one of, or is open
Note. Each module can be distinguished from the others depending on the difference of no-receive conditions between modules. < Refer to DTC MATRIX , LIST, List of Diagnostic Trouble Code (DTC). >
Scheme 29
When either one of (7), (12), (13), or is open
Note. Each module can be distinguished from the others depending on the difference of no-receive conditions between modules. < Refer to EXAMPLE OF DTC DATA NOT RECEIVED , LIST, List of Diagnostic Trouble Code (DTC). > < Refer to DTC MATRIX , LIST, List of Diagnostic Trouble Code (DTC). >
Scheme 30
When (8) is open
Note. 3) Perform inspection by referring to the communication initialization check (impossible to communicate with all modules). ((8) There may be a malfunction other than open circuit)
When (9) is open
Scheme 31
When (10) is open
Scheme 32
When (11) is open
Scheme 33
When (14) is open
Scheme 34
When (17) is open
Scheme 35
Note. When measuring the resistance of CAN communication circuit, measure it in sleep status. To be in the sleep status, turn the ignition switch OFF, stop the key and switch operations, keep all the doors, trunk and rear gate closed, and then left them untouched for one minute or more.
Scheme 36
- Refer to CVT Control System in the Wiring Diagram< Refer to System Wiring Diagram Article.>
- Refer to Electric Power Steering System in the Wiring Diagram< Refer to System Wiring Diagram Article. >
- Refer to Engine Electrical System in the wiring diagram< Refer to System Wiring Diagram Article.>
- Refer to CAN communication system in the wiring diagram< Refer to System Wiring Diagram Article.>
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK FROM DATA LINK CONNECTOR. Using the tester, measure the resistance between terminals. Connector & terminal (B40) No. 6 - Chassis ground: (B40) No. 14 - Chassis ground | Is the resistance 10 ohms or less? | Check for ground short. < Refer to GROUND SHORT INSPECTION , INSPECTION, CAN Communication Circuit Check. > | Go to step 2 . |
| 2 CHECK FROM DATA LINK CONNECTOR. Turn the ignition switch to ON. Using the tester, measure the voltage between terminals. Connector & terminal (B40) No. 6 - Chassis ground: (B40) No. 14 - Chassis ground | Is the voltage 5 V or less? | Go to step 3 . | Check for battery short. < Refer to BATTERY SHORT INSPECTION , INSPECTION, CAN Communication Circuit Check. > |
| 3 CHECK FROM DATA LINK CONNECTOR. Turn the ignition switch to OFF. Using the tester, measure the resistance between terminals. Connector & terminal (B40) No. 6 - No. 14 | Is the resistance 52 ohms or less? | Perform the inspection for the resistance of 52 ohms or less. < Refer to 52 ohms OR LESS , INSPECTION, CAN Communication Circuit Check. > | Go to step 4 . |
| 4 CHECK FROM DATA LINK CONNECTOR. Using the tester, measure the resistance between terminals. Connector & terminal (B40) No. 6 - No. 14 | Is the resistance 62 ohms or more? | Perform the inspection for the resistance of 62 ohms or more. < Refer to 62 ohms OR MORE , INSPECTION, CAN Communication Circuit Check. > | A related line may be open. Perform the inspection for 53 - 61 ohms relevant to the detected DTC. < Refer to LIST , CAN Communication Circuit Check. > |
LIST
| Resistance value between CAN Hi and Lo | Contents of inspection | Remarks |
|---|---|---|
| Ground short inspection | < Refer to GROUND SHORT INSPECTION , INSPECTION, CAN Communication Circuit Check. > | Shorted to ground in the communication circuit or control module. |
| Battery short inspection | < Refer to BATTERY SHORT INSPECTION , INSPECTION, CAN Communication Circuit Check. > | Shorted to battery power supply in the communication circuit or control module. |
| 53 - 61 ohms | < Refer to 53 - 61 ohms , INSPECTION, CAN Communication Circuit Check. > | Combined resistance of end resistance does not have malfunction; short to ground or +B short of the CAN communication circuit is possible, however. |
| 52 ohms or less | < Refer to 52 ohms OR LESS , INSPECTION, CAN Communication Circuit Check. > | Resistance is lower than combined resistance of end resistance. Short to CAN Hi and CAN Lo on the CAN communication circuit is possible. |
| 62 ohms or more | < Refer to 62 ohms OR MORE , INSPECTION, CAN Communication Circuit Check. > | Resistance is higher than combined resistance of end resistance. Open circuit of CAN communication circuit is possible. |
| Related lines 53 - 61 ohms (TCM) | < Refer to RELATED LINES 53 - 61 ohms (TCM) , INSPECTION, CAN Communication Circuit Check. > | No TCM data is received. Perform inspection when fault is detected. |
| Related lines 53 - 61 ohms (steering angle sensor) | < Refer to RELATED LINES 53 - 61 ohms (STEERING ANGLE SENSOR) , INSPECTION, CAN Communication Circuit Check. > | No steering angle sensor data is received. Perform inspection when fault is detected. |
| Related line 53 - 61 ohms (A/C control panel) | < Refer to RELATED LINE 53 - 61 ohms (A/C CONTROL PANEL) , INSPECTION, CAN Communication Circuit Check. > | No A/C data is received. Perform inspection when faulty is detected. |
| Related lines 53 - 61 ohms (electric power steering CM) | < Refer to RELATED LINES 53 - 61 ohms (ELECTRIC POWER STEERING CM) , INSPECTION, CAN Communication Circuit Check. > | No electric power steering data is received. Perform inspection when faulty is detected. |
| Related lines 53 - 61 ohms (combination meter) | < Refer to RELATED LINES 53 - 61 ohms (COMBINATION METER) , INSPECTION, CAN Communication Circuit Check. > | No meter data is received. Perform inspection when faulty is detected. |
| Related lines 53 - 61 ohms (MFD) | < Refer to RELATED LINES 53 - 61 ohms (MFD) , INSPECTION, CAN Communication Circuit Check. > | No MFD data is received. Perform inspection when faulty is detected. |
| Related lines 53 - 61 ohms (airbags) | < Refer to RELATED LINES 53 - 61 ohms (A/B CM) , INSPECTION, CAN Communication Circuit Check. > | No airbag data is received. Perform inspection when faulty is detected. |
| Related lines 53 - 61 ohms (headlight beam leveler) | < Refer to RELATED LINES 53 - 61 ohms (HEADLIGHT BEAM LEVELER) , INSPECTION, CAN Communication Circuit Check. > | No headlight beam leveler data is received. Perform inspection when faulty is detected. |
| Related lines 53 - 61 ohms (remote engine starter) | < Refer to RELATED LINES 53 - 61 ohms (REMOTE ENGINE STARTER) , INSPECTION, CAN Communication Circuit Check. > | Perform inspection when the remote engine starter does not operate, while the mobile key side operates normally. |
| DTC | Item | Content of diagnosis | Note |
|---|---|---|---|
| U1201 | CAN-HS Counter Abnormal | High speed CAN communication error | < Refer to DTC U1201 CAN-HS COUNTER ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0073 | Control Module Communication Bus "A" Off | Communication of some module is shut down. | < Refer to DTC U0073 CONTROL MODULE COMMUNICATION BUS "A" OFF , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0401 | Invalid Data Received From ECM/PCM "A" | Error data is received from ECM. | < Refer to DTC U0401 INVALID DATA RECEIVED FROM ECM/PCM "A" , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0402 | Invalid Data Received From TCM | Error data is received from TCM. | < Refer to DTC U0402 INVALID DATA RECEIVED FROM TCM , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0416 | Invalid Data Received From Vehicle Dynamics Control Module | Error data is received from VDC module. | < Refer to DTC U0416 INVALID DATA RECEIVED FROM VEHICLE DYNAMICS CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0420 | Invalid Data Received From Power Steering Control Module | Error data is received from EPS module. | < Refer to DTC U0420 INVALID DATA RECEIVED FROM POWER STEERING CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0422 | Invalid Data Received From Body Control Module | Error data is received from body integrated unit. | < Refer to DTC U0422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0423 | Invalid Data Received From Instrument Panel Cluster Control Module | Error data is received from meter. | < Refer to DTC U0423 INVALID DATA RECEIVED FROM INSTRUMENT PANEL CLUSTER CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0424 | Invalid Data Received From HVAC Control Module | Error data is received from A/C control panel. | < Refer to DTC U0424 INVALID DATA RECEIVED FROM HVAC CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0428 | Invalid Data Received From Steering Angle Sensor Module | Error data is received from steering angle sensor. | < Refer to DTC U0428 INVALID DATA RECEIVED FROM STEERING ANGLE SENSOR MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0452 | Invalid Data Received From Restraints Control Module | Error data is received from airbag module. | < Refer to DTC U0452 INVALID DATA RECEIVED FROM RESTRAINTS CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0100 | Lost Communication With ECM/PCM "A" | Data does not arrive from ECM. | < Refer to DTC U0100 LOST COMMUNICATION WITH ECM/PCM "A" , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0101 | Lost Communication With TCM | Data does not arrive from TCM. | < Refer to DTC U0101 LOST COMMUNICATION WITH TCM , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0122 | Lost Communication With Vehicle Dynamics Control Module | Data does not arrive from VDC module. | < Refer to DTC U0122 LOST COMMUNICATION WITH VEHICLE DYNAMICS CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0126 | Lost Communication With Steering Angle Sensor Module | Data does not arrive from steering angle sensor. | < Refer to DTC U0126 LOST COMMUNICATION WITH STEERING ANGLE SENSOR MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0131 | Lost Communication With Power Steering Control Module | Data does not arrive from EPS module. | < Refer to DTC U0131 LOST COMMUNICATION WITH POWER STEERING CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0140 | Lost Communication With Body Control Module | Data does not arrive from body integrated unit. | < Refer to DTC U0140 LOST COMMUNICATION WITH BODY CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0151 | Lost Communication With Restraints Control Module | Data does not arrive from airbag module. | < Refer to DTC U0151 LOST COMMUNICATION WITH RESTRAINTS CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0155 | Lost Communication With Instrument Panel Cluster (IPC) Control Module | Data does not arrive from meter. | < Refer to DTC U0155 LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IPC) CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0164 | Lost Communication With HVAC Control Module | Data does not arrive from A/C control panel. | < Refer to DTC U0164 LOST COMMUNICATION WITH HVAC CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U1120 | Lost Communication With Autostart Stop Control Module | Data does not arrive from combination meter. | < Refer to DTC U1120 LOST COMMUNICATION WITH AUTOSTART STOP CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
Scheme 37
- Module installation check Write "-" marks in the field for installation check if the vehicle to be inspected does not have relevant module. Write "-" marks in all blank fields on the same row that the "-" mark has filled in.
- Buss off detection / data not received NOTE: It becomes impossible for CAN diagnostic module to read DTC, if there is a current malfunction of open harness (data not received). If this occurs, perform the "Check using the check sheet of communication for initializing" < Refer to «CHECK USING THE CHECK SHEET OF COMMUNICATION FOR INITIALIZING»(ref-560387-S12298574582013061300000) , COMMUNICATION FOR INITIALIZING IMPOSSIBLE, Subaru Select Monitor. >, and use this sheet to confirm that the corresponding part becomes the past malfunction. Mark "X" in the field corresponding to the DTCs that has been detected by each module in the check sheet. Identify and repair the faulty part by referring to the example of DTC data not received and the DTC matrix. < Refer to «EXAMPLE OF DTC DATA NOT RECEIVED»(ref-560387-S40338771652013061300000) , LIST, List of Diagnostic Trouble Code (DTC). > < Refer to «DTC MATRIX»(ref-560387-S03873051862013061300000) , LIST, List of Diagnostic Trouble Code (DTC). >
- Data abnormal detection NOTE: If the buss off occurs or data is not received, perform the diagnosis for these problems first. If several modules detect the DTC for the same module, replace the detected module. If one module detects the DTC, replace the module of the detected side. If it does not return to the normal operation, re-install the module which has been replaced, and replace the module of the detected side. If it does not return to the normal operation, replace both modules.