INSPECTION
Before performing diagnostics, check the following item which might affect body integrated unit malfunctions.
- Measure the battery voltage and check electrolyte. Standard voltage 12 V or more Specific gravity: Above 1.260
- Check the fuse condition.
- Check the connecting condition of harness and harness connector.
- Confirm settings of body integrated unit are corresponded to vehicle equipment. Refer to «REGISTRATION BODY INTEGRATED UNIT»(ref-325333-S41366463162009071800000) .
- Make sure that a setting that does not match the vehicle equipment, is not set in the function setting (ECM customizing) of the body integrated unit. Refer to «FUNCTION SETTING (CUSTOMIZE)»(ref-325333-S07081356432009071800000) .
- Confirm "Factory or Market setting" of body integrated unit registrations is "Market".
- Confirm key illumination does not blink with ignition switch turned to ON.
DTC TABLE
Note. When more than two DTC codes are recorded, referring to their combination will make it easy to identify the possible cause. Refer to the list for typical examples.
| DTC to Check | Diagnostic Code that was displayed. | Probable cause | |||
|---|---|---|---|---|---|
| Body integrated unit | ECM | TCM | VDC/ABS CM | ||
| B1100 Refer to DTC B1100 INTEG. UNIT SYSTEM ERROR , Diagnostic Procedure with Diagnostic Trouble Code (DTC) . | B1100 | There could be a problem in the body integrated unit. | |||
| U1221 Refer to DTC U1221 CAN-HS ECM NO-RECEIVE DATA , Diagnostic Procedure with Diagnostic Trouble Code (DTC) . | U1221 | P1718 | C0057 | It is possible that the ECM is faulty. | |
| U1222 Refer to DTC U1222 CAN-HS TCM NO-RECEIVE DATA , Diagnostic Procedure with Diagnostic Trouble Code (DTC) . | U1222 | P0600 | C0057 | It is possible that the TCM is faulty. | |
| U1223 Refer to DTC U1223 CAN-HS VDC/ABS NO-RECEIVE DATA , Diagnostic Procedure with Diagnostic Trouble Code (DTC) . | U1223 | P0600 | P1718 | It is possible that the VDC/ABS CM is faulty. | |
| U1321 Refer to DTC U1321 CAN-LS METER NO-RECEIVE DATA , Diagnostic Procedure with Diagnostic Trouble Code (DTC) . | U1321 | It is possible that the combination meter is faulty. | |||
| B1500 Refer to DTC B1500 KEYLESS UART COM. MALFUNCTION , Diagnostic Procedure with Diagnostic Trouble Code (DTC) . | B1500 | It's possible that there is an internal problem in the keyless entry control module, or a open circuit in the communication line. | |||
DTC CHART
DIAGNOSIS
- Subaru Select Monitor communication line is open or shorted.
- Back-up power supply circuit malfunction
TROUBLE SYMPTOM
Not communicable with Subaru Select Monitor.
Scheme 9
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK IGNITION SWITCH . | Is the ignition switch ON? | Go to step 2 . | Turn the ignition switch to ON, and select Integ. Unit mode using Subaru Select Monitor. |
| 2 CHECK BATTERY . Turn the ignition switch to OFF. Measure the battery voltage. | Is the voltage 11 V or more? | Go to step 3 . | Charge or replace the battery. |
| 3 CHECK BATTERY TERMINAL . | Is there poor contact at the battery terminal? | Repair or tighten. the battery terminal. | Go to step 4 . |
| 4 CHECK COMMUNICATION OF SUBARU SELECT MONITOR . Turn the ignition switch to ON. Using the Subaru Select Monitor, check whether communication to other systems can be executed normally. | Is the system name displayed? | Go to step 7 . | Go to step 5 . |
| 5 CHECK COMMUNICATION OF SUBARU SELECT MONITOR . Turn the ignition switch to OFF. Disconnect the body integrated unit connector. Turn the ignition switch to ON. Check whether communication to other systems can be executed normally. | Is the system name displayed? | Go to step 7 . | Go to step 6 . |
| 6 CHECK HARNESS CONNECTOR BETWEEN EACH CONTROL MODULE AND SUBARU SELECT MONITOR . Turn the ignition switch to ON. Disconnect the body integrated unit connector. Measure the resistance between data link connector and chassis ground. Connector & terminal (B40) No. 7 - Chassis ground | Is the resistance 1 Mohms or more? | Go to step 7 . | Repair the harness and connector between each control module and Subaru Select Monitor. |
| 7 CHECK OUTPUT SIGNAL TO BODY INTEGRATED UNIT . Turn the ignition switch to ON. Measure the voltage between body integrated unit and chassis ground. Connector & terminal (B40) No. 7 (+) - Chassis ground (-) | Is the voltage less than 1 V? | Go to step 8 . | Repair the harness and connector between each control module and Subaru Select Monitor. |
| 8 CHECK HARNESS CONNECTOR BETWEEN BODY INTEGRATED UNIT AND DATA LINK CONNECTOR . Measure the resistance between body integrated unit and data link connector. Connector & terminal (B40) No. 7 - (B280) No. 20 | Is the resistance less than 1 ohms? | Go to step 9 . | Repair the harness and connector between body integrated unit and Subaru Select Monitor. |
| 9 CHECK BACK-UP FUSE . Check that back-up fuse is not blown out, or check that it is inserted. | Is back-up fuse OK? | Go to step 10 . | Replace the backup fuse, or insert it into the fuse holder. |
| 10 CHECK POWER SUPPLY CIRCUIT . Turn the ignition switch to ON (engine OFF). Measure the ignition voltage between body integrated unit connector and chassis ground. Connector & terminal (B280) No. 1 (+) - Chassis ground (-) | Is the voltage 10 V or more? | Go to step 11 . | Repair the open circuit of harness between body integrated unit and battery. |
| 11 CHECK HARNESS CONNECTOR BETWEEN BODY INTEGRATED UNIT AND CHASSIS GROUND . Turn the ignition switch to OFF. Disconnect the connector from body integrated unit. Measure the resistance of harness between the body integrated unit and chassis ground. Connector & terminal (B280) No. 20 - Chassis ground | Is the resistance 1 Mohms or more? | Go to step 12 . | Repair the poor contact of harness between body integrated unit and ground. |
| 12 CHECK POOR CONTACT IN CONNECTOR . | Is there poor contact at control module ground and Subaru Select Monitor? | Replace the body integrated unit. Refer to BODY INTEGRATED UNIT . | Repair the poor contact of connector. |
DIAGNOSIS PROCEDURE CHART
| CAUTION | When replacing body integrated unit on the model with immobilizer system, refer to the REGISTRATION MANUAL FOR IMMOBILIZER. |
DTC DETECTING CONDITION
Memory read out error in body integrated unit
- Check light comes on in the combination meter.
- LAN communication immobilizer function may not be executed normally.
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK DTC . Check the DTC displayed in the body integrated unit. | Is the DTC B1100 displayed current malfunction? | Go to step 2 . | Temporary EEPROM access error occurred. |
| 2 CHECK CONNECTOR . Turn the ignition switch to OFF. Disconnect the body integrated unit connector. Connect the disconnected connectors. Read the DTC of body integrated unit using Subaru Select Monitor. | Is the DTC B1100 displayed current malfunction? | Replace the body integrated unit. Refer to BODY INTEGRATED UNIT . | Temporary EEPROM access error occurred. |
DIAGNOSIS PROCEDURE CHART
- Battery power supply backup circuit is open or shorted.
- Battery voltage is too high or too low.
Each function stops operation.
Note. When B1102 BATT p/supply (backup) malfunction is output at the same time, all the function of body integrated unit may not operate. B1101 may input when the battery run-out occurs.
Scheme 10
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK DTC . Read the DTC of body integrated unit using Subaru Select Monitor. | Is B1101 current malfunction? | Go to step 2 . | Go to step 5 . |
| 2 CHECK DTC . Turn the ignition switch to OFF. Disconnect the connector from body integrated unit and reconnect. Wait approx. 2 minutes. Read the DTC of body integrated unit using Subaru Select Monitor. | Is B1101 current malfunction? | Go to step 3 . | Go to step 5 . |
| 3 CHECK FUSE . Turn the ignition switch to OFF. Inspect the fuse. | Is the fuse OK? | Go to step 4 . | Replace the defective fuse. |
| 4 CHECK HARNESS . Disconnect the body integrated unit connector (B280). Measure the voltage between body integrated unit connector and chassis ground using tester. Connector & terminal (B280) No. 6 (+) - Chassis ground (-) | Is the voltage 8.5 - 16.5 V? | Replace the body integrated unit. Refer to BODY INTEGRATED UNIT . | Repair or replace the open or shorted circuit between body integrated unit and fuse. |
| 5 CHECK CONNECTOR . Turn the ignition switch to OFF. Disconnect the body integrated unit connector (B280). | Is there poor contact in connector? | Repair or replace the poor contact of connector. | A temporary change of voltage occurred. |
DIAGNOSIS PROCEDURE CHART
Back-up power supply circuit input voltage is too high or too low.
No influence.
Note. When some B1101 BATT p/supply (control) malfunction cont. are output at the same time, all function of body integrated unit may not function. B1101 may input when the battery run-out occurs.
IGN power supply circuit voltage is too high or too low.
Error related to LAN system will not be detected.
Note. B1103 may output when the ignition switch turns to ON with the weak battery condition.
Scheme 11
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK DTC . Read the DTC of body integrated unit using Subaru Select Monitor. | Is B1103 current malfunction? | Go to step 2 . | Go to step 5 . |
| 2 CHECK DTC . Turn the ignition switch to OFF. Disconnect the connector from body integrated unit and reconnect. Turn the ignition switch to ON. Wait approx. 2 minutes. Read the DTC of body integrated unit using Subaru Select Monitor. | Is B1103 current malfunction? | Go to step 3 . | Go to step 5 . |
| 3 CHECK FUSE . Turn the ignition switch to OFF. Inspect the fuse. | Is the fuse OK? | Go to step 4 . | Replace the defective fuse. |
| 4 CHECK HARNESS . Disconnect the body integrated unit connector (B280). Measure the voltage between body integrated unit connector and chassis ground using tester. Connector & terminal (B280) No. 1 (+) - Chassis ground (-) | Is the voltage 8.5 - 16.5 V? | Replace the body integrated unit. Refer to BODY INTEGRATED UNIT . | Repair or replace the open or shorted circuit between body integrated unit and fuse. |
| 5 CHECK CONNECTOR . Turn the ignition switch to OFF. Disconnect the body integrated unit connector (B280). | Is there poor contact in connector? | Repair or replace the poor contact of connector. | A temporary change of voltage occurred. |
DIAGNOSIS PROCEDURE CHART
ACC power supply circuit voltage is too high or too low.
Does not exist.
Note. B1104 may output when the ignition switch turns to ACC with the weak battery condition.
Key interlock circuit is shorted to ground.
Key interlock does not keep lock condition.
Scheme 12
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK DTC . Insert the ignition key. Shift to the Neutral range. Read the DTC of body integrated unit using Subaru Select Monitor. | Is B1105 current malfunction? | Go to step 2 . | Go to step 8 . |
| 2 CHECK DTC . Remove the ignition key. Disconnect the key lock solenoid connector (B350) and body integrated unit connector (B279). Connect the disconnected connectors. Insert the key and shift into Neutral. Read the DTC of body integrated unit using Subaru Select Monitor. | Is B1105 current malfunction? | Go to step 3 . | Go to step 8 . |
| 3 CHECK KEY LOCK SOLENOID . Disconnect the key lock solenoid connector (B350). Measure the resistance between the key lock solenoid connector. Connector & terminal (B350) No. 1 - No. 2 | Is the resistance between 12- 14.5 ohms? | Go to step 4 . | Replace the key lock solenoid. |
| 4 CHECK KEY LOCK SOLENOID . Turn the ignition switch to OFF. Disconnect the key lock solenoid connector. Connect the battery terminal to key lock solenoid. Terminals (B350) No. 2 - positive terminal: (B350) No. 1 - ground terminal | Is the solenoid activated and then key locked? | Go to step 5 . | Replace the key lock solenoid. |
| 5 CHECK HARNESS . Disconnect the body integrated unit connector (B279). Measure the resistance between body integrated unit and key lock solenoid using tester. Connector & terminal (B350) No. 2 - (B279) No. 11 | Is the resistance less than 10 ohms? | Go to step 6 . | Repair or replace the open circuit of harness. |
| 6 CHECK HARNESS . Measure the resistance between body integrated unit and chassis ground using tester. Connector & terminal (B279) No. 11 - Chassis ground | Is the resistance 1 Mohms or more? | Go to step 7 . | Repair or replace the short circuit of the harness. |
| 7 CHECK HARNESS . Turn the ignition switch to ON. Measure the voltage between body integrated unit and chassis ground using tester. Connector & terminal (B279) No, 11 - Chassis ground | Is the voltage 1.5 V or more? | Repair or replace the short circuit of the harness. | Replace the body integrated unit. Refer to BODY INTEGRATED UNIT . |
| 8 CHECK CONNECTOR . Turn the ignition switch to OFF. Disconnect the body integrated unit connector (B279) and key lock solenoid connector (B350). | Is there poor contact at disconnected connector terminal? | Repair the terminal where poor contact exists, or replace harness. | It is possible that temporary poor contact occurs. |
DIAGNOSIS PROCEDURE CHART
Shift lock circuit is open or shorted.
Shift lock does not be released or remain locked.
Scheme 13
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK DTC . Turn the ignition switch to ON. Keep the Parking range for approx. 5 seconds. Read the DTC of body integrated unit using Subaru Select Monitor. | Is B1106 current malfunction? | Go to step 2 . | Go to step 7 . |
| 2 CHECK DTC . Disconnect the body integrated unit connector (B279) and shift lock solenoid connector (B117). Connect the disconnected connectors. Turn the ignition switch to ON, then keep the Parking range for approx. 5 seconds. Read the DTC of body integrated unit using Subaru Select Monitor. | Is B1106 current malfunction? | Go to step 3 . | Go to step 7 . |
| 3 CHECK HARNESS . Disconnect the shift lock solenoid connector (B117). Measure the resistance between shift lock solenoid unit and chassis ground using tester. Connector & terminal (B117) No. 4 - Chassis ground | Is the resistance less than 10 ohms? | Go to step 4 . | Replace the shift lock solenoid. |
| 4 CHECK SHIFT LOCK SOLENOID . Disconnect the shift lock solenoid connector. Measure the resistance between the shift lock solenoid connector. Connector & terminal (B117) No. 4 - No. 3 | Is the resistance between 19 - 25 ohms? | Go to step 5 . | Replace the shift lock solenoid. |
| 5 CHECK SHIFT LOCK SOLENOID . Turn the ignition switch to OFF. Disconnect the shift lock solenoid connector. Connect the battery terminal to shift lock solenoid. Terminals (B117) No. 3 - positive terminal: (B117) No. 4 - ground terminal | Is the solenoid activated, and then the shift lock released? | Go to step 6 . | Replace the shift lock solenoid. |
| 6 CHECK HARNESS . Disconnect the body integrated unit connector (B279). Measure the resistance between body integrated unit connector (B279) and chassis ground. Connector & terminal (B279) No. 12 - Chassis ground | Is the resistance 1 Mohms or more? | Replace the body integrated unit. Refer to BODY INTEGRATED UNIT . | Repair the short circuit of harness or replace harness. |
| 7 CHECK DTC . Turn the ignition switch to ON. With Parking range, depress the brake pedal and keep it at depressed condition. Read the DTC of body integrated unit using Subaru Select Monitor. | Is B1106 current malfunction? | Go to step 8 . | Go to step 9 . |
| 8 CHECK DTC . Turn the ignition switch to OFF. Disconnect the body integrated unit connector (B279) and shift lock solenoid connector (B117). Connect the disconnected connectors. Turn the ignition switch to ON. Shift into Parking range, then depress the brake pedal. Read the DTC of body integrated unit using Subaru Select Monitor. | Is B1106 current malfunction? | Go to step 4 . | Go to step 9 . |
| 9 CHECK CONNECTOR . Turn the ignition switch to OFF. Disconnect the body integrated unit connector (B279) and shift lock solenoid connector (B117). | Is there poor contact in connector terminal? | Repair the poor contact of the terminal or replace the harness. | It is possible that temporary poor contact occurs. |
DIAGNOSIS PROCEDURE CHART
High speed CAN communication becomes unstable.
Malfunction indicator light illuminates.
Scheme 14
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK DTC . Using the Subaru Select Monitor, read all DTCs. | Is there DTC U1202? | Perform the diagnosis according to DTC. | Go to step 2 . |
| 2 CHECK DTC . Check DTC indicated by body integrated unit. | Is U1201 a current malfunction? | Go to step 3 . | Go to step 14 . |
| 3 CHECK DTC . Turn the ignition switch to OFF. Disconnect all connectors (B280, B310, B55, B136, B230, B231) that are connected to high speed CAN communication line. Connect all the disconnected connectors. Read the DTC of body integrated unit using Subaru Select Monitor. | Is U1201 a current malfunction? | Go to step 4 . | Go to step 14 . |
| 4 CHECK TCM . Turn the ignition switch to OFF. Disconnect the TCM connector (B55). Read the DTC of body integrated unit using Subaru Select Monitor. | Is U1201 a current malfunction? | Go to step 5 . | Go to step 16 . |
| 5 CHECK STEERING ANGLE SENSOR . Turn the ignition switch to OFF. Connect the TCM connector. Disconnect the steering angle sensor connector (B231). Read the DTC of body integrated unit using Subaru Select Monitor. | Is U1201 a current malfunction? | Go to step 6 . | Go to step 17 . |
| 6 CHECK YAW RATE SENSOR . Turn the ignition switch to OFF. Connect the steering angle sensor connector. Disconnect the yaw rate sensor connector (B230). Read the DTC of body integrated unit using Subaru Select Monitor. | Is U1201 a current malfunction? | Go to step 7 . | Go to step 18 . |
| 7 CHECK VDC/ABS CM HARNESS . Turn the ignition switch to OFF. Connect the yaw rate sensor connector. Disconnect the VDC/ABS CM connector (B310). Install the 120 ohms resistance to VDC/ABS CM connector terminals. Terminals (B310) No. 10 - No. 35: Using the tester, measure the resistance between terminals of data link connector. Terminals (B40) No. 6 - No. 14 | Is the resistance 60 ohms? | Go to step 8 . | Go to step 10 . |
| 8 CHECK DTC . Read the DTC of body integrated unit using Subaru Select Monitor. | Is U1201 a current malfunction? | Go to step 16 . | Go to step 9 . |
| 9 CHECK DTC . Read the DTC of body integrated unit using Subaru Select Monitor. | Is U1202 a current malfunction? | Replace the VDC/ABS CM. Refer to REMOVAL , VDC Control Module and Hydraulic Control Unit (VDCCM & H/U) . | Go to step 10 . |
| 10 CHECK ECM . Turn the ignition switch to OFF. Connect the VDC/ABS CM. Disconnect the ECM connector (B136). Install the 120 ohms resistance to ECM connector. Terminals (B136) No. 27 - No. 35: Using the tester, measure the resistance between terminals of data link connector. Connector & terminal (B40) No. 6 - No. 14 | Is the resistance 60 ohms? | Go to step 11 . | Repair or replace the open circuit of harness. |
| 11 CHECK DTC . Read the DTC of body integrated unit using Subaru Select Monitor. | Is U1201 a current malfunction? | Go to step 12 . | Repair or replace the open circuit of measured related harness. |
| 12 CHECK DTC . Read the DTC of body integrated unit using Subaru Select Monitor. | Is U1202 a current malfunction? | Replace the ECM. | Go to step 13 . |
| 13 CHECK DTC . Reconnect all the disconnected connectors. Read the DTC of body integrated unit using Subaru Select Monitor. | Is U1201 a current malfunction? | Replace the body integrated unit. Refer to REMOVAL , Body Integrated Unit . | Go to step 14 . |
| 14 CHECK HARNESS . Shake the instrument harness and bulkhead harness, rear harness. Read the DTC of body integrated unit using Subaru Select Monitor. | Is U1201 a current malfunction? | Repair or replace the harness. | Go to step 15 . |
| 15 CHECK CONNECTOR . Connect the tester to ECM terminal, and measure the resistance. Connector & terminal (B136) No. 27 - No. 35: Disconnect the connector used for CAN circuit. Check the connector terminal. | Is there poor contact in connector terminal? | Repair the connector terminal where poor contact exists, or replace harness. | Replace the ECM. Refer to ENGINE CONTROL MODULE (ECM) . |
| 16 CHECK HARNESS . Using the tester, measure the resistance between terminals of data link connector and TCM. Connector & terminal (B40) No. 14 - (B55) No. 17: (B40) No. 6 - (B55) No. 18 | Is the resistance less than 10 ohms? | Go to step 17 . | Repair or replace the harness. |
| 17 CHECK HARNESS . Using the tester, measure the resistance between terminals of data link connector and steering angle sensor. Connector & terminal (B40) No. 14 - (B231) No. 1: (B40) No. 6 - (B231) No. 2 | Is the resistance less than 10 ohms? | Go to step 18 . | Repair or replace the harness. |
| 18 CHECK HARNESS . Using the tester, measure the resistance between terminals of data link connector and yaw rate sensor. Connector & terminal (B40) No. 14 - (B230) No. 3: (B40) No. 6 - (B230) No. 2 | Is the resistance less than 10 ohms? | Replace the yaw rate sensor. | Repair or replace the harness. |
DIAGNOSIS PROCEDURE CHART
- Open or power supply-output short, GND-output short occurs in CAN line.
- End resistance malfunction
- Internal error in each control module
Each warning light illuminate because the CAN communication (sending and receiving) is not normal.
Scheme 15
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK DTC . Using the Subaru Select Monitor, confirm all DTCs. | Is any DTC other than for the body integrated unit displayed? | Perform the diagnosis according to displayed DTC. | Go to step 2 . |
| 2 CHECK DTC . Turn the ignition switch to OFF. Read the DTC of body integrated unit using Subaru Select Monitor. | Is U1202 a current malfunction? | Go to step 3 . | Go to step 10 . |
| 3 CHECK DTC . Turn the ignition switch to OFF. Disconnect all connectors (B280, B310, B55, B136, B230, B231) that are connected to high speed CAN communication line. Connect the disconnected connectors. Read the DTC of body integrated unit using Subaru Select Monitor. | Is U1202 a current malfunction? | Go to step 4 . | Go to step 10 . |
| 4 CHECK HARNESS . Disconnect all connectors (B280, B310, B55, B136, B230, B231) that are connected to high speed CAN communication line. Using the tester, measure the resistance between terminals of harness. Connector & terminal (B40) No. 6 - (B136) No. 27: (B40) No. 6 - (B310) No. 35: (B40) No. 6 - (B230) No. 2: (B40) No. 6 - (B231) No. 2: (B40) No. 6 - (B55) No. 18: (B40) No. 6 - (B280) No. 3 | Is the resistance less than 10 ohms? | Go to step 5 . | Repair or replace the open circuit of harness. |
| 5 CHECK HARNESS . Using the tester, measure the resistance between terminals of harness. Connector & terminal (B40) No. 14 - (B136) No. 35: (B40) No. 14 - (B310) No. 10: (B40) No. 14 - (B230) No. 3: (B40) No. 14 - (B231) No. 1: (B40) No. 14 - (B55) No. 17: (B40) No. 14 - (B280) No. 9 | Is the resistance less than 10 ohms? | Go to step 6 . | Repair or replace the open circuit of harness. |
| 6 CHECK ECM . Connect the ECM. Using the tester, measure the resistance between terminals of data link connector. Connector & terminal (B40) No. 6 - No. 14 | Is the resistance 120±5ohms? | Go to step 7 . | Inspect the ECM. Refer to READ DIAGNOSTIC TROUBLE CODE (DTC) , OPERATION, Subaru Select Monitor . |
| 7 CHECK VDC/ABS CM . Disconnect the ECM connector (B136). Connect the VDC/ABS CM. Using the tester, measure the resistance between terminals of data link connector. Connector & terminal (B40) No. 6 - No. 14 | Is the resistance 120±5ohms? | Go to step 8 . | Replace the VDC/ABS CM. |
| 8 CHECK HARNESS . Connect the disconnected connectors. Using the tester, measure the resistance between terminals of data link connector and chassis ground. Connector & terminal (B40) No. 6 - Chassis ground: (B40) No. 14 - Chassis ground | Is the resistance 1 Mohms or more? | Go to step 9 . | Go to step 12 . |
| 9 CHECK HARNESS . Turn the ignition switch to ON. Using the tester, measure the voltage between terminals of data link connector and chassis ground. Connector & terminal (B40) No. 6 - Chassis ground: (B40) No. 14 - Chassis ground | Is the voltage 6 V or more? | Go to step 13 . | Replace the body integrated unit. |
| 10 CHECK HARNESS . Shake the harness. Read the DTC of body integrated unit using Subaru Select Monitor. | Is U1202 a current malfunction? | Repair or replace the harness. | Go to step 11 . |
| 11 CHECK CONNECTOR . Disconnect the connector used for high speed CAN circuit. | Is there poor contact in connector terminal? | Repair the connector terminal, or replace harness. | It is possible that temporary poor contact occurs. |
| 12 CHECK CONTROL MODULE . With the tester connected, disconnect each control module connector. | Is there any control module whose resistance has changed? | Replace the control module whose resistance has changed. | Repair or replace the open or short circuit of the harness. |
| 13 CHECK ECM . With the tester connected, disconnect each control module connector. | Is there any control module whose voltage has changed? | Replace the control module whose voltage has changed. | Repair or replace the short circuit of the harness. |
DIAGNOSIS PROCEDURE CHART
Received error data from ECM.
It is possible that engine control error may occur.
Received error data from TCM.
It is possible that transmission control error may occur.
Received error data from VDC/ABS CM.
It is possible that brake control error may occur.
Not received error data from ECM. (If error is in the main harness, DTC P0600 CAN communication link is input).
Malfunction indicator light illuminates.
Not received error data from TCM.
Malfunction indicator light illuminates.
Not received error data from VDC/ABS CM.
ABS warning light and VDC warning light illuminate.
Either end of low-speed CAN communication line is open or shorted, the connector is not connected properly, or the terminal has poor crimping.
No influence.
Scheme 16
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK DTC . Read the DTC of body integrated unit using Subaru Select Monitor. | Is U1300 a current malfunction? | Go to step 2 . | Go to step 7 . |
| 2 CHECK DTC . Check the DTC displayed in the body integrated unit. Disconnect all connectors (i84, i10, i88, i85 or i50) that are connected to low speed CAN communication line. Connect the disconnected connectors. Read the DTC of body integrated unit using Subaru Select Monitor. | Is U1300 a current malfunction? | Go to step 3 . | Go to step 7 . |
| 3 CHECK DTC . Turn the ignition switch to OFF, and read the DTC again. Turn the ignition switch to OFF. Disconnect all connectors (i84, MO, i88, i85 or i50) that are connected to low speed CAN communication line. Using the tester, measure the resistance between terminals of harness. Connector & terminal (i84) No. 1 - (i10) No. 27 (combination meter): (i84) No. 9 - (i10) No. 26 (combination meter): (i84) No. 1 - (i88) No. 20 (auto A/C): (i84) No. 9 - (i88) No. 19 (auto A/C): (i84) No. 1 - (i85) No. 12 (audio): (i84) No. 9 - (i85) No. 11 (audio): (i84) No. 1 - (i50) No. 18 (navigation): (i84) No. 9 - (i50) No. 6 (navigation) | Is the resistance less than 10 ohms? | Go to step 4 . | Repair or replace the harness. |
| 4 CHECK AUDIO OR NAVIGATION . Turn the ignition switch to OFF. Connect the disconnected connectors. Disconnect the connector of navigation (i85) or audio (i50). Read the DTC of body integrated unit using Subaru Select Monitor. | Is U1300 a current malfunction? | Go to step 5 . | Repair the navigation or audio. |
| 5 CHECK AUTO A/C ECM . Turn the ignition switch to OFF. Connect the audio or navigation connectors. Disconnect the auto A/C ECM connector (i88). Read the DTC of body integrated unit using Subaru Select Monitor. | Is U1300 a current malfunction? | Go to step 6 . | Replace the auto A/C control module. |
| 6 CHECK BODY INTEGRATED UNIT . Turn the ignition switch to OFF. Connect the auto A/C control module. Replace the body integrated unit of your vehicle with the body integrated unit from other vehicle, which is working normally. Read the DTC of body integrated unit using Subaru Select Monitor. | Is U1300 a current malfunction? | Replace the combination meter. Refer to REMOVAL , Combination Meter . | Replace the body integrated unit. |
| 7 CHECK HARNESS . Turn the ignition switch to OFF. Shake the harness used for CAN communication circuit. Read the DTC of body integrated unit using Subaru Select Monitor. | Is U1300 a current malfunction? | Repair or replace the harness. | Go to step 8 . |
| 8 CHECK CONNECTOR . Turn the ignition switch to OFF. Disconnect the connector that is connected to low speed CAN circuit. | Is there poor contact at disconnected connector? | Repair the connector terminal, or replace harness. | Temporary poor contact occurs. |
DIAGNOSIS PROCEDURE CHART
Communication becomes unstable because of low speed CAN communication error.
Display error may occur in fuel gauge because the CAN communication is not transmitted (sending/receiving) normally.
- Open or power supply-output short, GND-output short occurs in both CAN line.
- Internal error in each control module
Display error may occur in fuel gauge because the CAN communication is not transmitted (sending/receiving) normally.
Error data is received from combination meter.
Defective data from combination meter occurs.
Scheme 17
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK DTC . Read the DTC of body integrated unit using Subaru Select Monitor. | Is DTC U1301 or U1302 displayed? | Perform the diagnosis according to DTC. | Go to step 2 . |
| 2 CHECK DTC . Read the DTC of body integrated unit using Subaru Select Monitor. | Is U1311 a current malfunction? | Go to step 3 . | Go to step 4 . |
| 3 CHECK DTC . Turn the ignition switch to OFF. Disconnect the combination meter connector (i10). Read the DTC of body integrated unit using Subaru Select Monitor. | Is U1311 a current malfunction? | Replace the combination meter. Refer to REMOVAL , Combination Meter . | Go to step 4 . |
| 4 CHECK HARNESS . Shake the harness used for low speed CAN communication circuit. Read the DTC of body integrated unit using Subaru Select Monitor. | Is U1311 a current malfunction? | Repair or replace the harness. | Go to step 5 . |
| 5 CHECK CONNECTOR . Turn the ignition switch to OFF. Disconnect all connectors (i84, i10, i88, i85 or i50) that are connected to low speed CAN communication line. | Is there poor contact in connector terminal? | Repair the connector terminal, or replace harness. | Temporary poor contact occurs. |
DIAGNOSIS PROCEDURE CHART
Not received error data from combination meter.
Engine may not be started.
UART between keyless entry control module and body integrated unit is open or shorted, the connector is not connected properly, or the terminal is crimped improperly, keyless entry control module internal error.
Door lock does not operate with keyless.
Scheme 18
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK DTC . Read the DTC of body integrated unit using Subaru Select Monitor. | Is B1500 current malfunction? | Go to step 2 . | Go to step 6 . |
| 2 CHECK DTC . Turn the ignition switch to OFF. Disconnect the connectors from body integrated unit and keyless entry control module. Connect the disconnected connectors. Read the DTC of body integrated unit using Subaru Select Monitor. | Is B1500 current malfunction? | Go to step 3 . | Go to step 6 . |
| 3 CHECK HARNESS . Turn the ignition switch to OFF. Disconnect the connectors from body integrated unit and keyless entry control module. Using the tester, measure the resistance between terminals of harness. Connector & terminal (i84) No. 24 - (R80) No. 3 | Is the resistance less than 10 ohms? | Go to step 4 . | Repair the open circuit of harness or replace harness. |
| 4 CHECK HARNESS . Using the tester, measure the voltage between keyless entry control module and chassis ground. Connector & terminal (R80) No. 4 - Chassis ground | Is the voltage battery voltage? | Go to step 5 . | Check the power supply circuit for keyless entry control module. |
| 5 CHECK OPERATION . Install the keyless entry control module from other vehicle, which is working normally. Register the keyless key which is working normally. Operate the keyless key. | Is the door locking operate? | Replace the keyless entry control module. Refer to REMOVAL , Keyless Entry Control Module . | Replace the body integrated unit. Refer to BODY INTEGRATED UNIT . |
| 6 CHECK CONNECTOR . Disconnect the connectors from body integrated unit and keyless entry control module. | Is there poor contact in connector? | Repair the connector, or replace harness. | Temporary poor contact occurs. |
DIAGNOSIS PROCEDURE CHART
Read the DTC or inspect and diagnose the following data in the current data display using Subaru Select Monitor.