Fail-Safe Table - Suzuki 2006 SX4 Service Manual

7B-54 Air Conditioning System: Automatic Type
DTC of A/C System detected by ECM
DTC No.
P0481
P0532
P0533
NOTE
When no DTC is detected, "FRE" [A] and "REC" [B] indicator lights on HVAC control module flash at
the same time in specific pattern.

Fail-Safe Table

When any of the following malfunctions (DTCs) is detected, fail-safe mode is activated.
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 circuit
A/C evaporator
B1503 temperature sensor
circuit
B1504 Sunload sensor circuit
Temperature selector
B1520
malfunction
Blower speed selector
B1521
malfunction
Air flow selector
B1522
malfunction
Detection item
Fan 2 Control Circuit
A/C Refrigerant Pressure
Sensor Circuit Low
A/C Refrigerant Pressure
Sensor Circuit High
[A] [B]
H: ON
L: OFF
When ignition switch is turned ON
after malfunction is already detected
HVAC control module maintains last
normal value.
HVAC control module assuming that
evaporator temperature is 0 °C (32 °F).
HVAC control module maintains last
normal value.
HVAC control module maintains last
normal value.
HVAC control module maintains last
normal value.
HVAC control module maintains last
normal value.
Detecting condition
(DTC will set when detecting)
Refer to "Fail-Safe Table in Section 1A".
[A]
H
L
a a a
b b
[B]
H
L
a a a
b b
I5RW0A722008-01
a. About 3 seconds
b. About 1 seconds
Fail-Safe Operation
When malfunction is detected during
HVAC control module controls actuators
assuming that inside air temperature is
25 °C (77 °F).
• HVAC control module turns off A/C
switch signal.
• HVAC control module controls
actuators assuming that evaporator
temperature is 0 °C (32 °F).
HVAC control module controls actuators
assuming that amount of sunlight is 0 W/
m 2 .
HVAC control module controls actuators
assuming that setting of temperature
selector is 25 °C (77 °F) position.
HVAC control module controls actuators
assuming that setting of blower speed
selector is low (1st) position.
HVAC control module controls actuators
assuming that setting of air flow selector
is DEF position.
MIL
S6RW0D7224007
ignition switch is ON