On-Board Diagnostic System Description (For Vehicle Without A; Hvac Control System Description; Vehicle Without A - Suzuki Grand Vitara 2011 Manual

On-Board Diagnostic System Description (for
Vehicle without A/C)
HVAC control module (for vehicle without A/C) detects
malfunction, which may occur in the following area.
When HVAC control module detects any malfunction, the
REC (recirculation) indicator lamp (4) flashes on and off
continuously after turning ignition switch to ON position.
• ECT sensor
• CMP sensor
• Wheel speed sensor
• Temperature control actuator
• Air flow control actuator
• Air intake control actuator
• Temperature selector of HVAC control module
• Blower speed selector of HVAC control module
• Serial communication line
• CAN communication line
DTC can be checked by either one of the following ways.
• DTC can be checked by using SUZUKI scan tool (2)
connected to DLC (1).
• Without using SUZUKI scan tool, DTC can be
checked by reading the flashing pattern of both the
FRE (fresh) indicator lamp (3) and the REC
(recirculation) indicator lamp (4).
HVAC Control System Description (for Vehicle without A/C)
For CAN communication system, refer to description on "CAN Communication System Description: For Petrol Engine
Model 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.
• Pressing DEF (defogger) switch (5) alternates display
of current DTC and history DTC.
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• DEF indicator lamp (6) remains off when display is in
current DTC and it lights up when display is in history
DTC.
Heater and Ventilation:
5
6
4
1
2
7A-3
3
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