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)
Standard voltage
2 CHECK HARNESS AND CONNECTOR (COMBINATION METER - GROUND)
Standard resistance
3 CHECK COMMUNICATION LINE
Standard resistance
HINT:
*1: for Automatic A/C
*2: for Manual A/C
Result
REPLACE COMBINATION METER
Mass or Volume Air Flow Circuit
DESCRIPTION
The Mass Air Flow (MAF) meter is a sensor that measures the amount of air
flowing through the throttle
valve. The ECM uses this information to determine the fuel injection time and to
provide appropriate airfuel
ratio. Inside the MAF meter, there is a heated platinum wire whic ...
Precaution
1. HANDLING PRECAUTION FOR CRUISE CONTROL
SYSTEM
Turn the cruise control main switch off when not
using the cruise control system.
Be careful as the vehicle speed increases when
driving downhill with the cruise control system on.
The + (ACCEL)/RES (RESUME) operation ch ...
Diagnosis Circuit
DESCRIPTION
DTC output mode is set by connecting terminals TC and CG of the DLC3.
DTCs are displayed by blinking the SRS warning light.
HINT:
When each warning light stays blinking, a ground short in the
wiring of terminal TC of the DLC3 or an
internal ground short in each ECU is ...