B126A

THEFT DETERRENT / KEYLESS ENTRY: REMOTE ENGINE STARTER SYSTEM: B126A: Remote Engine Starter ECU Communication Stop
B126A - Remote Engine Starter ECU Communication Stop

DESCRIPTION

This DTC is stored when BRAKES communication between the remote engine starter ECU and main body ECU (multiplex network body ECU) stops for 10 seconds or more.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* Inspect the fuses for circuits related to this system before performing the following inspection procedure.
* Before replacing the remote engine starter ECU, refer to Registration Remote Engine Starter System.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (REMOTE ENGINE STARTER ECU - BATTERY AND BODY GROUND)

(a) Disconnect the I141 remote engine starter ECU connector.

(b) Measure the voltage and resistance according to the value(s) in the table below.

Standard Voltage:





Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - REMOTE ENGINE STARTER ECU)

(a) Disconnect the I13 main body ECU (multiplex network body ECU) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. REPLACE REMOTE ENGINE STARTER ECU

(a) Temporarily replace the remote engine starter ECU with a new one Removal.

NEXT -- Continue to next step.

4. REGISTER REMOTE ENGINE STARTER ID

(a) Register the remote engine starter ID Remote Engine Starter System.

NEXT -- Continue to next step.

5. CHECK DTC OUTPUT

(a) Clear the DTC Remote Engine Starter System.

(b) Perform the remote engine start operation.

(c) Check for DTCs.

OK:

DTC B126A is not output.

NG -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal

OK -- END (REMOTE ENGINE STARTER ECU WAS DEFECTIVE)