Inspection Procedure

HINT:

When "+B of GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTC B1209, repair the "+B or GND short malfunction of communication bus" DTCs first.

1. INSPECT FUSE (FR DOOR LH) 
   1. Remove the FR DOOR LH fuse from the cowl side J/B LH.
   2. Measure the resistance of the fuse.

   Standard resistance: 

   Below 1 Ω 

   NG: REPLACE FUSE 

   OK: Go to next step 

2. CHECK HARNESS AND CONNECTOR (OUTER MIRROR CONTROL ECU - BATTERY AND BODY GROUND) 
   1. Disconnect the M10 ECU connector.
   2. Measure the voltage and resistance of the wire harness side connector.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART
   
   

   Tester Connection	Condition	Specified Condition
   BDR (M10-6) - Body ground	Always	10 to 14 V

   Fig 1: Identifying M10 ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART
   
   

   Tester Connection	Specified Condition
   GND (M10-1) - Body ground	Below 1 Ω

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to next step 

3. CHECK RESISTANCE OF COMMUNICATION LINE 
   1. Disconnect the M10, J55 and 2F ECU connectors.
   2. Measure the resistance between the specified terminals on the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART
   
   

   Tester Connection	Specified Condition
   MPX1 (M10-8) - MPX2 (J55-24)	Below 1 Ω
   MPX1 (M10-8) - 2F-5	Below 1 Ω

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   Both are OK	A
   One is OK	B
   Both are NG	C

   Fig 2: Identifying M10, J55 And 2F ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   B: REPAIR OR REPLACE HARNESS OR CONNECTOR AND REPLACE OUTER MIRROR CONTROL ECU 

   C: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPLACE OUTER MIRROR CONTROL ECU