DTC B126A: Remote Engine Starter ECU Communication Stop [10/2014 - ]: Procedure

1. Disconnect the D67 remote engine starter ECU connector.
2. Measure the voltage and resistance according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   D67-10 (R+B) - Body ground	Power switch off	11 to 14 V
   D67-1 (RSIG) - Body ground	Power switch on (IG)	11 to 14 V
   D67-1 (RSIG) - Body ground	Power switch off	Below 1 V

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D67-19 (RGN1) - Body ground	Always	Below 1 Ω

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  2

1. Disconnect the D6 main body ECU (multiplex network body ECU) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D6-25 (BTX) - D67-4 (BTX)	Always	Below 1 Ω
   D6-26 (BRX) - D67-3 (BRX)	Always	Below 1 Ω
   D6-25 (BTX) - Body ground	Always	10 kΩ or higher
   D6-26 (BRX) - Body ground	Always	10 kΩ or higher
   D67-4 (BTX) - Body ground	Always	10 kΩ or higher
   D67-3 (BRX) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Temporarily replace the remote engine starter ECU with a new one (Refer to REMOVAL [10/2014 - ] ).

Result: 

NEXT 

See step  4

1. Register the remote engine starter ID (Refer to REGISTRATION [10/2014 - ] ).

Result: 

NEXT 

See step  5

1. Clear the DTCs (Refer to DTC CHECK / CLEAR [10/2014 - ] ).
2. Perform the remote hybrid control system starter operation.
3. Check for DTCs.

   OK

   DTC B126A is not output.

Result: 

OK 

END (REMOTE ENGINE STARTER ECU WAS DEFECTIVE) 

Result: 

NG 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

(Refer to REMOVAL [10/2014 - 10/2015] or REMOVAL [10/2015 - ] )