FixVault
Home › Subaru › 2006 › Outback XT, Standard › Repair and Diagnosis › Engine Performance › System › Engine Controls - Engine (Diagnostics) (H4DOTC) › Malfunction Indicator Light › Malfunction Indicator Light Remains Blinking

Malfunction Indicator Light Remains Blinking

DIAGNOSIS: 

Test mode connector circuit is shorted.

TROUBLE SYMPTOM: 

Malfunction indicator light blinks when test mode connector is not connected.

WIRING DIAGRAM: 

Fig 1: Malfunction Indicator Light Remains Blinking - Wiring Diagram
G05021618
DIAGNOSTIC PROCEDURE

Step Check Yes No
1 CHECK TEST MODE CONNECTOR. 
  1. Disconnect the test mode connectors.
  2. Turn the ignition switch to ON.
 Does the malfunction indicator light blink? Go to step 2.  System is normal.
NOTE: Malfunction indicator light blinks at a cycle of 3 Hz when test mode connector is connected.
2 CHECK HARNESS BETWEEN ECM CONNECTOR AND CHASSIS GROUND TERMINAL. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connectors from ECM.
  3. Measure the resistance of harness between ECM connector and chassis ground.

    Connector & terminal 

    (B137) No. 15 - Chassis ground: 

 Is the resistance less than 5 Ω? Repair the short circuit of harness between ECM and test mode connector. Replace the ECM. < Ref. to ENGINE CONTROL MODULE (ECM) . >
About FixVault