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:
Operating the audio system
Press this button to eject a disc
Insert a disc into the disc slot
Press to pause or resume playing music.
Press the “<” or “>” button to seek up or down for a radio station, or
to access a desired track or file.
Turn this knob to select radio station bands, tracks and ...
Poor Sound Quality in All Modes (Low Volume)
INSPECTION PROCEDURE
1 CHECK AUDIO SETTINGS
Set "BASS", "MID" and "TREB" to the initial values and
check that sound is normal.
OK:
Malfunction disappears.
2 COMPARE WITH ANOTHER VEHICLE OF SAME MODEL
Compare with another vehicle of the same model.
...
Disassembly
1. Remove rear wheel
2. Drain brake fluid
Notice:
wash the brake fluid off immediately if it attaches to
any painted surface.
3. REMOVE REAR BRAKE DRUM SUB-ASSEMBLY
(a) Release the parking brake lever, and remove the
rear brake drum.
HINT:
If the rear brake drum cannot be removed easily,
p ...
