Toyota RAV4 manuals

Toyota Sienna Service Manual: Back Door ECU Communication Stop

DTC B1287 Back Door ECU Communication Stop

DESCRIPTION

DTC B1287 is output when communication between the power back door ECU and the multiplex network gateway ECU stops for more than 10 seconds.

DTC No.

DTC Detection Condition

Trouble Area

B1287

Back door ECU communication stops
  • Power back door ECU
  • Wire harness

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

1 CHECK HARNESS AND CONNECTOR (POWER BACK DOOR ECU - BATTERY)

CHECK HARNESS AND CONNECTOR (POWER BACK DOOR ECU - BATTERY)

  1. Disconnect the P14 and P13 ECU connectors.
  2. Measure the voltage according to the value(s) in the table below.

Standard voltage

Standard voltage

2 CHECK HARNESS AND CONNECTOR (POWER BACK DOOR ECU - GROUND)

CHECK HARNESS AND CONNECTOR (POWER BACK DOOR ECU - GROUND)

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

Standard resistance

Standard resistance

3 CHECK COMMUNICATION LINE

CHECK COMMUNICATION LINE

  1. Disconnect the G4 ECU connector.
  2. Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

Result

Result

REPLACE POWER BACK DOOR ECU

Airbag ECU Communication Stop
DTC B1281 Airbag ECU Communication Stop DESCRIPTION DTC B1281 is output when communication between the airbag ECU and the multiplex network gateway ECU stops for more than 10 seconds. ...

Can communication
...

Other materials:

Diagnosis system
1. CHECK DLC3  The ECU uses ISO 15765-4 for communication. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format. NOTICE: *: Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ig ...

Reassembly
1. INSTALL NO. 1 SEAT CUSHION FRAME SUBASSEMBLY LH  Install the seat cushion frame with the bolt. Torque: Except 7-Passenger RH, M8 bolt 20.6 N*m (210 kgf*cm, 15 ft.*lbf) M10 bolt 41 N*m (418 kgf*cm, 30 ft.*lbf) 2. INSTALL RECLINING CONTROL LINK SUBASSEMBLY LH  Install ...

Inspection
1. INSPECT FUEL INJECTOR ASSEMBLYV (A) inspect the injector resistance. (1) Using an ohmmeter, measure the resistance between the terminals. Standard resistance If the resistance is not as specified, replace the injector. (b) Inspect the injection volume. CAUTION: This test ...

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