Toyota RAV4 manuals

Toyota Sienna Service Manual: Combination Meter ECU Communication Stop

DTC B1271 Combination Meter ECU Communication Stop

DESCRIPTION

DTC B1271 is output when communication between the combination meter and the multiplex network gateway ECU stops for more than 10 seconds.

DTC No.

DTC Detection Condition

Trouble Area

B1271

Combination meter communication stops
  • Combination meter
  • Wire harness

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

1 CHECK HARNESS AND CONNECTOR (COMBINATION METER - BATTERY)

CHECK HARNESS AND CONNECTOR (COMBINATION METER - BATTERY)

  1. Disconnect the C10 connector.
  2. Measure the voltage according to the value(s) in the table below.

Standard voltage

Standard voltage

2 CHECK HARNESS AND CONNECTOR (COMBINATION METER - GROUND)

CHECK HARNESS AND CONNECTOR (COMBINATION METER - 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 A9 and G4 connectors.
  2. Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

HINT:
*1: for Automatic A/C
*2: for Manual A/C

Result

Result

REPLACE COMBINATION METER

A/C ECU Communication Stop
DTC B1262 A/C ECU Communication Stop DESCRIPTION DTC B1262 is output when communication between the A/C amplifier and the multiplex network gateway ECU stops for more than 10 seconds. ...

Power Seat ECU Communication Stop
DTC B1272 Power Seat ECU Communication Stop DESCRIPTION This DTC is detected when communication between the seat position control ECU and the multiplex network gateway ECU stops for more than 10 ...

Other materials:

Removal
1. Disconnect battery negative terminal 2. Remove instrument cluster finish panel sub-assembly center Hint: (see page ip-9) 3. Remove transmission control cable assembly (a) Remove the nut from the control shaft lever. (b) Disconnect the transmission control cable assembly from the con ...

Disassembly
1. REMOVE RH SEAT REAR SEAT RECLINING COVER  Remove the 2 screws.  Remove the RH seat rear seat reclining cover by pulling it out in the arrow mark direction shown in the illustration. 2. REMOVE LH SEAT REAR SEAT RECLINING COVER  Remove the 2 screws.  R ...

Removal
HINT:  Use the same procedures for the RH side and LH side. The procedures listed below are for the LH side. 1. PRECAUTION CAUTION: Be sure to read "PRECAUTION" thoroughly before servicing. 2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL NOTICE: Wait for 90 seconds ...

В© 2011-2019 Copyright www.tsienna.net