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:

Power Back Door does not Operate
DESCRIPTION The power back door operates only when the power back door main switch is ON. The power back door ECU controls the power back door by activating the back door motor (built into the power back door drive unit) to open / close the back door. A request signal from the satell ...

On-vehicle inspection
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How to proceed with troubleshooting
The intelligent tester can be used in steps 4, 6, 8 and 9. 1 VEHICLE BROUGHT TO WORKSHOP 2 CUSTOMER PROBLEM ANALYSIS 3 PASSENGER AIRBAG ON/OFF INDICATOR CHECK 4 DTCs CHECK (Present and Past DTCs) Check for DTCs. Result GO TO PROBLEM SYMPTOMS TABLE 5 DTCs CHART 6 CIRCUIT ...

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