DTC B1296: Front Light ECU Communication Stop: Procedure

1. Remove the MPX-B fuse from the engine room relay block No. 1.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   MPX-B fuse	Always	Below 1 Ω

NG → REPLACE FUSE (MPX-B) 

OK: Go to next step 

1. Disconnect the 2E and 2F connectors.
   Fig 1: Identifying 2E And 2F Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage and resistance according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   2E-4 (FMB3) - Body ground	Always	11 to 14 V

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   2F-1 (E) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (FRONT CONTROLLER (ENGINE ROOM RELAY BLOCK NO. 2)) - BATTERY AND BODY GROUND) 

OK: Go to next step 

1. Disconnect the 2F, A30 and J55 connectors.
   Fig 2: Identifying 2F, A30 And J55 Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   2F-6 (MPX2) - A30-17 (MPX2)	Always	Below 1 Ω
   2F-5 (MPX1) - J55-24 (MPX2)	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE FRONT CONTROLLER (ENGINE ROOM RELAY BLOCK NO. 2)