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Communication For Initializing Impossible

WARNING: This page is about a different car, the 2006 Subaru Outback, 2006 Subaru Legacy, and 2006 Saab 9-2X. However, it is still accessible from the selected car via links, so may be relevant.

DETECTING CONDITION: 

Defective harness connector

TROUBLE SYMPTOM: 

Communication is impossible between the tire pressure monitoring control module and the Subaru Select Monitor.

WIRING DIAGRAM: 

Fig 1: Communication For Initializing Impossible - Wiring Diagram
G05020190
DIAGNOSIS PROCEDURE

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 TPM mode using Subaru Select Monitor.
2 CHECK BATTERY.  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? Replace or tighten the battery terminal. Go to step 4. 
4 CHECK SUBARU SELECT MONITOR COMMUNICATION. 
  1. Turn the ignition switch to ON.
  2. Using the Subaru Select Monitor, check whether communication to other systems can be performed normally.
 Are the system name and model year displayed on Subaru Select Monitor? Go to step 8.  Go to step 5. 
5 CHECK SUBARU SELECT MONITOR COMMUNICATION. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the tire pressure monitoring control module connector.
  3. Turn the ignition switch to ON.
  4. Check whether communication to other systems can be executed normally.
 Are the system name and model year displayed on Subaru Select Monitor? Replace the tire pressure monitoring control module. < Ref. to TIRE PRESSURE MONITORING CONTROL MODULE , REMOVAL, Tire Pressure Monitoring System. > Go to step 6. 
6 CHECK HARNESS CONNECTOR BETWEEN EACH CONTROL MODULE AND DATA LINK CONNECTOR. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the tire pressure monitoring control module.
  3. Measure the resistance between data link connector and chassis ground.

    Connector & terminal 

    (B40) No. 10 - Chassis ground: 

 Is the resistance 1 MΩ or more? Go to step 7.  Repair the harness and connector between each control module and data link connector.
7 CHECK THE TIRE PRESSURE MONITORING CONTROL MODULE OUTPUT SIGNAL. 
  1. Turn the ignition switch to ON.
  2. Measure the voltage between tire pressure monitoring control module and chassis ground.

    Connector & terminal 

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

 Is the voltage less than 1 V? Go to step 8.  Repair the harness and connector between each control module and data link connector.
8 CHECK HARNESS CONNECTOR BETWEEN TIRE PRESSURE MONITORING CONTROL MODULE AND DATA LINK CONNECTOR. 
Measure the resistance between tire pressure monitoring control module and data link connector.
Connector & terminal 
(R211) No. 1 - (B40) No. 10: 		 Is resistance less than 0.5 Ω? Go to step 9.  Repair the harness and connector between tire pressure monitoring control module and data link connector.
9 CHECK TIRE PRESSURE MONITORING CONTROL MODULE CONNECTOR. 
Turn the ignition switch to OFF.		 Is the tire pressure monitoring control module connector inserted in the tire pressure monitoring control module until it locks? Go to step 10  . Insert the tire pressure monitoring control module connector into the tire pressure monitoring control module.
10 CHECK POWER SUPPLY CIRCUIT. 
  1. Turn the ignition switch to ON. (engine OFF)
  2. Measure the ignition power voltage between tire pressure monitoring control module connector and chassis ground.

    Connector & terminal 

    (R211) No. 5 (+) - Chassis ground (-): 

 Is the voltage 10 - 15 V? Go to step 11.  Repair open circuit of the harness between the tire pressure monitoring control module and battery.
11 CHECK HARNESS CONNECTOR BETWEEN TIRE PRESSURE MONITORING CONTROL MODULE AND CHASSIS GROUND. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connector from the tire pressure monitoring control module.
  3. Measure the resistance of harness between tire pressure monitoring control module and chassis ground.

    Connector & terminal 

    (R211) No. 9 - Chassis ground: 

 Is resistance less than 0.5 Ω? Go to step 12.  Repair open circuit of the harness of the tire pressure monitoring control module.
12 CHECK POOR CONTACT IN CONNECTOR.  Is there poor contact in tire pressure monitoring control module power supply, ground circuit and data link connector? Repair the connector. Replace the tire pressure monitoring control module. < Ref. to TIRE PRESSURE MONITORING CONTROL MODULE , REMOVAL, Tire Pressure Monitoring System. >
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