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 |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK HARNESS AND CONNECTOR (COMBINATION METER - BATTERY)
- Disconnect the C10 connector.
- Measure the voltage according to the value(s) in the table below.
Standard voltage
2 CHECK HARNESS AND CONNECTOR (COMBINATION METER - GROUND)
- Measure the resistance according to the value(s) in the table below.
Standard resistance
3 CHECK COMMUNICATION LINE
- Disconnect the A9 and G4 connectors.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
HINT:
*1: for Automatic A/C
*2: for Manual A/C
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:
A/F Sensor Circuit Slow Response
HINT:
DTC P2A00 indicates malfunctions related to the bank 1 A/F sensor.
DTC P2A03 indicates malfunctions related to the bank 2 A/F sensor.
Bank 1 refers to the bank that includes cylinder No. 1.
Bank 2 refers to the bank that includes cylinder No. 2.
Sensor 1 refers to the sensor mo ...
Cranking Holding Function Circuit
DESCRIPTION
The system detects the ignition switch's starting signal (STSW) and then
supplies current to the starter
until the ECM judges that the engine has started successfully. The purpose is to
reduce the holding time
of the ignition key.
WIRING DIAGRAM
Refer to DTC P0617.
INSPECTI ...
Disassembly
1. REMOVE REAR DOOR WINDOW FRAME MOULDING
REAR LH (See page ET-31)
2. REMOVE REAR DOOR WINDOW FRAME MOULDING
SUB-ASSEMBLY LH (See page ET-32)
3. REMOVE SLIDE DOOR WINDOW GARNISH LH
Fully open the slide door window.
Remove the glass run.
Using a screwdriver, disengage the clip and rem ...
