Fail-Safe Table; Scan Tool Data - Suzuki Liana RH413 Service Manual

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
Trouble Area
No.
Temperature control actuator
B1511 (position sensor) and/or its circuit
Air flow control actuator (position
B1512 sensor) and/or its circuit
Temperature control actuator and/
B1513 or its circuit
Air flow control actuator and/or its
B1514 circuit
Temperature selector and/or its
B1520 circuit
Blower speed selector and/or its
B1521 circuit
Air flow selector and/or its circuit
B1522

Scan Tool Data

As the data values given in the following are standard values estimated on the basis of values obtained from the
normally operation vehicles by using a scan tool, use them as reference values. Even when the vehicles are in good
condition, there may be cases where the checked values do not fall within each specifies data range. Therefore,
judgement as abnormal should not be made by checking with these data alone.
Scan Tool Data
TEMP CONT SWITCH
MODE CONT SWITCH
FAN CONT SWITCH
FAN DESIRE VOLT
AIR MIX POS SENSOR
MODE POS SENSOR
BLOWER FAN LOAD
AIR INTAKE MODE
REC INDICATOR
LAMP
FRE INDICATOR LAMP
REAR DEF INDICATOR
LAMP
Detection of malfunction when
ignition switch is turned ON
Condition
Each reference value is relative to the position of
temperature selector of HVAC control module.
Each reference value is relative to the position of air
flow selector of HVAC control module.
Each reference value is relative to the position of
blower speed selector of HVAC control module.
Reference value is relative to the position of blower
speed selector of HVAC control module.
Reference value is relative to the position of
temperature selector of HVAC control module.
Reference value is relative to the position of airflow
selector of HVAC control module.
Position of blower speed selector is 1st or 2nd
position.
Position of blower speed selector is more than 3rd
position.
Fresh air (FRE) mode is activated.
Recirculation air (REC) mode is activated.
Recirculation air (REC) indicator lamp is lighted.
Recirculation air (REC) indicator lamp is not lighted.
Fresh air (FRE) indicator lamp is lighted
Fresh air (FRE) indicator lamp is not lighted
Rear defogger indicator lamp is lighted
Rear defogger indicator lamp is not lighted
Heater and Ventilation:
Fail-Safe Operation
Detection of malfunction during
ignition switch is ON
The operation of actuator stops.
Middle position
1st position
DEF position
Normal Condition / Reference Value
Max Cool, P1, P2 – P20, P21, Max Hot
VENT, BI-LEVEL, FOOT, DEF-FOOT,
OFF, 1st, 2nd – 7th, 8th
about 1.0 V (Max Hot)
about 4.0 V (Max Cool)
about 1.0 V (DEF)
about 4.0 V (VENT)
7A-9
S3RH0A7104005
S3RH0A7104006
DEF
0 – 15.5 V
ON
OFF
FRE
REC
ON
OFF
ON
OFF
ON
OFF