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Home >> Subaru >> 2005 >> Outback R VDC Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 25 (Automatic Transmission (Diagnostics) 4AT (D)) >> Diagnostic Procedure for Select Monitor Communication >> Communication For Initializing Impossible

Communication For Initializing Impossible

WARNING: This page is about a different variant/trim than selected.

DIAGNOSIS: 

Faulty harness connector

TROUBLE SYMPTOM: 

Subaru Select Monitor communication failure

WIRING DIAGRAM: 

Fig 1: Wiring Diagram - Select Monitor Communication
G03831552Courtesy of SUBARU OF AMERICA, INC.
SELECT MONITOR COMMUNICATION DIAGNOSTIC PROCEDURE

Step Check Yes No
1. CHECK INSTALLATION OF TCM CONNECTOR. 
Turn the ignition switch to OFF.		 Is TCM connector inserted into TCM? Go to step 2  . Connect the TCM connector to TCM.
2. CHECK SUBARU SELECT MONITOR POWER SUPPLY CIRCUIT. 
Measure the voltage between data link connector and chassis ground.
Connector & terminal 
(B40) No. 1 (+) - Chassis ground (-): 		 Is the voltage more than 10 V? Go to step 3  . Repair the harness connector and connector between battery and data link connector, and poor contact in coupling connector.
3. CHECK SUBARU SELECT MONITOR GROUND CIRCUIT. 
  1. Disconnect the connectors from ECM.
  2. Measure the resistance of harness connector between data link connector and ECM.

    Connector & terminal 

    (B40) No. 12 - Chassis ground: 

 Is the resistance less than 1 Ω? Go to step 4  . Repair the open circuit in harness between data link connector and ECM.
4. CHECK SUBARU SELECT MONITOR GROUND CIRCUIT. 
Measure the resistance of harness connector between data link connector and chassis ground.
Connector & terminal 
(B40) No. 12 - Chassis ground: 
(B40) No. 13 - Chassis ground: 		 Is the resistance more than 1 MΩ? Go to step 5  . Repair the short circuit in harness between data link connector and ground terminal.
5. CHECK ENGINE GROUND CIRCUIT. 
Check engine ground circuit. < Ref. to , DTC P1708 THROTTLE POSITION SENSOR CIRCUIT LOW INPUT , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >		 Is the engine ground circuit normal? Go to step 6  . Repair the ground circuit of ECM.
6. CHECK COMMUNICATION OF SUBARU SELECT MONITOR. 
  1. Turn the ignition switch to ON.
  2. Using the Subaru Select Monitor, check whether communication to transmission systems can be executed normally.
 Are the name of system displayed on Subaru Select Monitor? Go to step 11  . Go to step 7  .
7. CHECK COMMUNICATION OF SUBARU SELECT MONITOR. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the TCM connector.
  3. Check whether communication to engine systems can be executed normally.
 Are the name of system displayed on Subaru Select Monitor? Go to step 9  . Go to step 8  .
8. CHECK COMMUNICATION OF SUBARU SELECT MONITOR. 
  1. Turn the ignition switch to OFF.
  2. Connect the TCM connector.
  3. Disconnect the ECM connector and ABSCU&H/U.
  4. Check whether communication to transmission systems can be executed normally.
 Are the name of system displayed on Subaru Select Monitor? Inspect the ECM or ABSCU&H/U. Go to step 9  .
9. CHECK HARNESS CONNECTOR BETWEEN EACH CONTROL UNIT AND DATA LINK CONNECTOR. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the TCM and ECM and ABSCU&H/U connector.
  3. Measure the resistance between TCM connector and chassis ground.

    Connector & terminal 

    (B40) No. 10 - Chassis ground: 

 Is the resistance more than 1 MΩ? Go to step 10  . Check harness and connector between each control unit and data link connector.
10. CHECK OUTPUT SIGNAL FOR TCM. 
  1. Turn the ignition switch to ON.
  2. Measure the voltage between TCM and chassis ground.

    Connector & terminal 

    (B40) No. 10 (+) - Chassis ground (-): 

 Is the voltage more than 1 V? Check harness and connector between each control unit and data link connector. Go to step 11  .
11. CHECK HARNESS CONNECTOR BETWEEN TCM AND DATA LINK CONNECTOR. 
Measure the resistance between TCM connector and data link connector.
Connector & terminal 
(B55) No. 12 - (B40) No. 10: 		 Is the resistance less than 1 Ω? Go to step 12  . Repair the harness and connector between TCM and data link connector.
12. CHECK TRANSMISSION HARNESS CONNECTOR.  Is the transmission harness connector connected to bulkhead harness connector? Go to step 13  . Connect the bulkhead harness connector to transmission harness connector.
13. CHECK POOR CONTACT IN CONNECTORS.  Is there poor contact in control unit power supply and data link connector? Repair the poor contact. Go to step 14  .
14. CHECK POWER SUPPLY OF TCM. 
  1. Disconnect the connector from TCM.
  2. Turn the ignition switch to ON.
  3. Measure the voltage between TCM connector and chassis ground.

    Connector & terminal 

    (B55) No. 27 (+) - Chassis ground (-): 

    (B55) No. 28 (+) - Chassis ground (-): 

    (B55) No. 29 (+) - Chassis ground (-): 

 Is the voltage 10 - 13 V? Go to step 16  . Go to step 15  .
15. CHECK FUSE (No. 12). 
  1. Turn the ignition switch to OFF.
  2. Remove the fuse (No. 12).
 Is the fuse (No. 12) blown? Replace the fuse (No. 12). If the replaced fuse (No. 12) blown out easily, repair the short circuit in harness between fuse (No. 12) and TCM. Repair the open circuit in harness between fuse (No. 12) and TCM, or fuse (No. 12) and battery, and poor contact in coupling connector.
16. CHECK IGNITION POWER SUPPLY CIRCUIT. 
  1. Turn the ignition switch to ON (engine OFF).
  2. Measure the ignition power supply voltage between TCM connector and chassis ground.

    Connector & terminal 

    (B56) No. 21 (+) - Chassis ground (-): 

    (B56) No. 31 (+) - Chassis ground (-): 

 Is the voltage 10 - 13 V? Go to step 18  . Go to step 17  .
17. CHECK FUSE (No. 12). 
Remove the fuse (No. 12).		 Is the fuse (No. 12) blown? Replace the fuse (No. 12). If the replaced fuse (No. 12) blown out easily, repair the short circuit in harness between fuse (No. 12) and TCM. Repair the open circuit in harness between fuse (No. 12) and TCM, or fuse (No. 12) and battery, and poor contact in connector.
18. CHECK HARNESS CONNECTOR BETWEEN TCM AND TRANSMISSION. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connector from TCM and transmission.
  3. Measure the resistance of harness between TCM and transmission connector.

    Connector & terminal 

    (B54) No. 8 - (B11) No. 19: 

    (B54) No. 17 - (B11) No. 19: 

    (B55) No. 2 - (B11) No. 20: 

    (B55) No. 3 - (B11) No. 20: 

 Is the resistance less than 1 Ω? Go to step 19  . Repair the open circuit in harness between TCM and transmission harness connector, and poor contact in connector.
19. CHECK HARNESS CONNECTOR BETWEEN TRANSMISSION AND TRANSMISSION GROUND. 
Measure the resistance of harness between transmission and transmission ground.
Connector & terminal 
(T4) No. 19 - Transmission ground: 
(T4) No. 20 - Transmission ground: 		 Is the resistance less than 1 Ω? Go to step 20  . Repair the open circuit in harness between transmission and transmission ground.
20. CHECK POOR CONTACT IN CONNECTORS.  Is there poor contact in TCM power supply, ground and data link connector? Repair the connector. Replace the TCM. < Ref. to TRANSMISSION CONTROL MODULE (TCM) . >
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