Diagnosis system (HVAC)
U1000 CAN comm circuitB257B, B257C ambient sensor
Description
COMPONENT DESCRIPTION
Ambient Sensor
The ambient sensor (1) is installed to the front bumper
reinforcement.
It detects ambient temperature and converts it into a resistance
value which is then input into the A/C auto amp.
Ambient Sensor Circuit
AMBIENT TEMPERATUR ...
System description
FRONT WIPER AND WASHER SYSTEM
System Diagram
System Description
OUTLINE
The front wiper is controlled by each function of BCM and IPDM E/R.
Control by BCM
Combination switch reading function
Front wiper control function
Control by IPDM E/R
Front wiper control function
Relay con ...
B2557 vehicle speed
Description
BCM receives the 2 vehicle speed signals via CAN
communication. One signal is transmitted by the "combination
meter". Another signal is transmitted by "ABS actuator and electric unit
(control unit)". BCM compares
both signals to detect the vehicle speed.
DTC Logic
DTC DETECTIO ...