Toyota Sienna Service Manual: 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.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|
B1262 |
A/C ECU communication stops |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - BATTERY)
- Disconnect the A9 connector.
- Measure the voltage according to the value(s) in the table below.
Standard voltage
HINT:
*1: for Automatic A/C
*2: for Manual A/C
2 CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - GROUND)
- 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
3 CHECK COMMUNICATION LINE
- Disconnect the C10 and A21 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 A/C AMPLIFIER
Rear Door ECU LH Communication Stop
DTC B1217 Rear Door ECU LH Communication Stop
DESCRIPTION
DTC B1217 is output when communication between the power slide door ECU LH
and the multiplex
network gateway ECU stops for more than 10 s ...
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 se ...
Other materials:
Installation
1. INSTALL REAR AXLE HUB & BEARING ASSEMBLY LH
(a) Install the hub & Bearing assembly LH with the 4
bolts.
Torque: 56 N*m (571 kgf*cm, 41 ft.*lbf)
2. INSPECT BEARING BACKLASH (See page AH-16)
3. INSPECT AXLE HUB DEVIATION (See page AH-16)
4. CONNECT SKID CONTROL SENSOR WIRE
(a) Co ...
Problem symptoms table
HINT:
Use the table below to help determine the cause of the
problem symptoms. The potential causes of the symptoms
are listed in order of probability in the ''Suspected Area''
column of the table. Check each symptom by checking the
suspected areas in the order they are listed. Rep ...
Shift lock system
On-vehicle inspection
1. CHECK SHIFT LOCK OPERATION
(a) Move the shift lever to the P position.
(b) Turn the ignition switch to the LOCK position.
(c) Check that the shift lever cannot be moved to any
position other than P.
(d) Turn the ignition switch to the on position, depress
the br ...
