Fail-Safe Table - Suzuki GRAND VITARA Owner's Manual

7B-17 Air Conditioning System:
[A]: B1520 (15 – 1)
[B]: B1562 (1 – 4)

Fail-Safe Table

When any of the following malfunctions (DTCs) is detected, HVAC control module enters fail-safe mode.
However, when HVAC control module detects normal operation of A/C system, fail-safe mode is canceled.
DTC No. Trouble Area
Inside air temperature
B1502 sensor and/or its circuit
malfunction
Evaporator temperature
B1503 sensor and/or its circuit
malefaction
Sunload sensor and/or its
B1504
circuit malfunction
Temperature control
B1511 actuator (position sensor)
and/or its circuit malfunction
Air flow control actuator
B1512 (position sensor) and/or its
circuit malfunction
Temperature control
B1513 actuator and/or its circuit
malfunction
Air flow control actuator
B1514
and/or its circuit malfunction
Temperature selector
B1520
malfunction
Blower speed selector
B1521
malfunction
Air intake control actuator
B1530 (position sensor) and/or its
circuit malfunction
Air intake control actuator
B1531
and/or its circuit malfunction
[A]
(a)
(b)
[B]
(a)
(b)
(a): "REC" indicator flashing pattern
(b): "FRE" indicator flashing pattern
When ignition switch is turned
ON after malfunction is already
detected
HVAC control module controls actuators assuming that inside air
temperature is 25 °C (77 °F).
HVAC control module controls actuators assuming that amount of
evaporator temperature is –6 °C (21.2 °F).
HVAC control module controls actuators assuming that amount of sunlight is
0 W/m .
2
Circuit open: Temperature control actuator fixed to "MAX HOT" position.
Circuit short: Temperature control actuator fixed to "MAX COOL" position.
Circuit open: Air flow control actuator fixed to "DEF" position.
Circuit short: Air flow control actuator fixed to "VENT" position.
Stop the operation of temperature control actuator.
Stop the operation of Air flow control actuator.
HVAC control module keeps
condition just before malfunction is
detected.
HVAC control module keeps
condition just before malfunction is
detected.
Circuit open: Air intake control actuator fixed to "FRE" position.
Circuit short: Air intake control actuator fixed to "REC" position.
Stop the operation of temperature control actuator.
I5JB0A720019-02
Fail-Safe Operation
When malfunction is detected
during ignition switch is ON
HVAC control module controls
actuators assuming that setting of
temperature selector is 23 °C (73.4
°F).
HVAC control module controls
actuators assuming that as follows.
• Blower speed is minimum.
• Air flow control actuator fixed to
"DEF" position.
S5JB0A7204031