Hvac Control System Description (For Vehicle Without A; Schematic And Routing Diagram; Heater And Ventilation Wiring Circuit Diagram; Electronic Control Input / Output Table (For Vehicle Without A - Suzuki GRAND VITARA Owner's Manual

HVAC Control System Description (for Vehicle without A/C)
For CAN communication system, refer to description on "CAN Communication System Description: in Section 1A".
When following data are sent from control modules to BCM through CAN communication, they are sent from BCM to
HVAC control module through serial communication line.
• Engine coolant temperature
• Engine Speed
• Wheel speed (Vehicle speed)
HVAC control module has a function to make initial settings of temperature control actuator, air intake actuator and air
flow actuator.
For vehicle without A/C, HVAC control module uses engine speed signal so that temperature control actuator, air
intake actuator and air flow actuator can make initial setting for door position.
Initial settings of actuators are automatically made when engine is started for the first time after battery is connected.
When initial settings are made, each actuator is forced to operate for about 15 seconds continuously.

Heater and Ventilation Wiring Circuit Diagram

Refer to "A/C System Wiring Circuit Diagram: in Section 7B".
Electronic Control Input / Output Table (for Vehicle without A/C)
Data link connector
ECT sensor
ECM
*
ABS control module
*
BCM

Schematic and Routing Diagram

HVAC control module
CMP sensor
Wheel
speed
sensor
*: CAN communication
Temperature selector
MODE (air flow) selector
Blower speed selector
Air intake selector
CPU
Temperature control actuator
Air flow control actuator
Air intake control actuator
Blower motor controller
Heater and Ventilation:
S5JB0A7101005
S5JB0A7102001
S5JB0A7102003
I5JB0A710003-05
7A-3