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Home >> Subaru >> 2004 >> Baja Base, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> ONSTAR (Diagnostics) >> Diagnosis for Each Symptom >> ONSTAR (R) Led Does Not Operate.

ONSTAR (R) Led Does Not Operate.

DEFINITION: When ignition switch is turned to ON, OnStar(R) green LED does not illuminate.

Fig 1: Identifying OnStar(R) Led Does Not Operate
G03510763Courtesy of SUBARU OF AMERICA, INC.
DIAGNOSTICS CHART WITH TROUBLE CODE

Step Check Yes No
1 CHECK LED SIGNAL. 
  1. Turn ignition switch to OFF.
  2. Disconnect connection from button assembly connector.
  3. Turn ignition switch to ON (do not let the engine run).
  4. Measure voltage of key pad green LED signal circuit.

    Connector & Terminal 

    1. (i73) No. 5 (+) - Chassis ground: 
    2. (i73) No. 25 (+) - Chassis ground (-): 
 Is the measured value within 7 to 9 V? Go to step 10. Go to step 2.
2 CHECK HARNESS. 
  1. Turn ignition switch to OFF.
  2. Disconnect VIU connector.
  3. Disconnect button assembly connector.
  4. Measure resistance between VIU connector and button assembly connector.

    Connector & Terminal 

    1. (i73) No. 5 - (i70) No. 1: 
    2. (i73) No. 20 - (i70) No. 2: 
    3. (i73) No. 25 - (i70) No. 3: 
 Is the measured value less than 0.5 ohm? Go to step 2. Repair open harness.
3 CHECK HARNESS. 
Measure resistance between VIU connector and chassis ground.
Connector & Terminal 
  1. (i73) No. 5 - Chassis ground: 
  2. (i73) No. 20 - Chassis ground: 
  3. (i73) No. 25 - Chassis ground: 
 Is the measured value More than 1 Mohm? Go to step 4. Repair ground short of harness.
4 CHECK LED SIGNAL HARNESS. 
  1. Turn the ignition switch to ON.
  2. Measure voltage between VIU connector and chassis ground.

    Connector & Terminal 

    1. (i73) No. 5 (+) - Chassis ground (-): 
    2. (i73) No. 25 (+) - Chassis ground (-): 
 Is the measured value less than 1 V Go to step 5. Repair battery short of harness. Replace button assembly. < Ref. to REMOVAL , BUTTON ASSEMBLY. >
5 CHECK VIU POWER SUPPLY. 
  1. Turn the ignition switch to ON.
  2. Measure voltage between VIU connector and chassis ground.

    Connector & Terminal 

    1. (i73) No. 16 (+) - Chassis ground (-): 
    2. (i73) No. 32 (+) - Chassis ground (-): 
    3. (i73) No. 22 (+) - Chassis ground (-) 
    4. (i73) No. 27 (+) - Chassis ground (-): 
 Is the measured value more than 9 V? Go to step 6. Check fuse or repair open circuit in harness.
6 CHECK VIU GROUND. 
  1. Turn ignition switch to OFF.
  2. Measure resistance between VIU connector and chassis ground.

    Connector & Terminal 

    1. (i73) No. 1 - Chassis ground: 
    2. (i73) No. 7 - Chassis ground: 
 Is the measured value less than 0.5 ohm? Go to step 7. Repair open circuit in harness.
7 CHECK BUTTON ASSEMBLY HARNESS CONNECTOR. 
Check if there is any poor contact in button assembly connector.		 Is there any poor contact in connector? Go to step 8. Repair poor contact in connector.
8 CHECK BUTTON ASSEMBLY. 
Replace button assembly. < Ref. to REMOVAL , BUTTON ASSEMBLY. >		 Is repair work completed? Go to step 9. -
9 CHECK SYSTEM. 
Run the system and confirm the result of repair.		 Was the trouble repaired? System is OK. Go to step 8.
10 CHECK VIU HARNESS CONNECTOR. 
Check if there is any poor contact in VIU harness connector.		 Is there any poor contact in connector? Go to step 11. Repair poor contact in connector.
11 CHECK VCU. 
IMPORTANT: Perform setup procedure of OnStar (R).

Replace vehicle interface unit (VIU). < Ref. to REMOVAL , VEHICLE INTERFACE UNIT VIU. >		 - Go to step 12. -
12 CHECK SYSTEM. 
Run the system and confirm the result of repair.		 Was the trouble repaired? System is OK. Go to step 1.
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