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. DRAIN AUTOMATIC TRANSAXLE FLUID (See page AX-131) 2. REMOVE NO. 1 TRANSFER CASE PLUG (See page TF-8) 3. REMOVE TRANSFER DRAIN PLUG (a) Remove the transfer drain plug, gasket and bleed the drain transfer oil. 4. REMOVE FRONT WHEEL 5. REMOVE FRONT DRIVE SHAFT ASSEMBLY RH HINT: (See page D ...

Installation
1. INSTALL FRONT SEAT ASSEMBLY RH  Place the seat assembly in the cabin. NOTICE: Be careful not to damage the body.  Connect the connectors under the seat assembly.  Tighten the 2 bolts on the front side of the seat assembly. Torque: 37 N*m (375 kgf*cm, 27 ft.*lbf) ...

Glossary of tire terminology
Tire related term Meaning Cold tire inflation pressure Tire pressure when the vehicle has been parked for three hours or more, or has not been driven more than 1 mile or 1.5 km under that condition Maximum inflation pressure The maximum cold i ...

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