Suzuki Liana RH413, Service Manual

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Air Conditioning System: Automatic Type 7B-60
DTC B1511 (No.11): Temperature Control Actuator (Position Sensor) and/or its Circuit Malfunction
S3RH0A7224016
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
5V
5V
RED/WHT
WHT
BLK/RED G77-9
G77-28
G77-26
2
1
3
9
26 28
I3RH0A722013-01
1. HVAC control module 2. Temperature control actuator 3. HVAC control module connector “G77” (viewed from harness side)
DTC Detecting Condition Trouble Area
Signal from temperature control position sensor is less than the specified
(0.0 V) or more than the specified (5.0 V). • “RED/WHT”, “WHT” and/or “BLK/
RED” wire faulty
• Temperature control actuator faulty
• HVAC control module faulty
Step Action Yes No
1 1) Turn ignition switch OFF, and then disconnect
temperature control actuator connector referring to
“Temperature Control Actuator Removal and Installation
in Section 7A”.
2) Turn ignition switch ON, and then check voltage
between “RED/WHT” wire terminal at temperature
control actuator connector and body ground.
Is voltage about 5 V?
Go to Step 4. Go to Step 2.
2 1) Turn ignition switch OFF, and then disconnect HVAC
control module connector referring to “HVAC Control
Module Removal and Installation in Section 7A”.
2) Check resistance between “RED/WHT” wire terminal at
temperature control actuator connector and “RED/WHT”
wire terminal at HVAC control module connector.
Is resistance less than 1 M
Ω
?
Go to Step 3. “RED/WHT” wire open
or high resistance.
3 1) Check resistance between “RED/WHT” wire terminal
and body ground.
Is resistance more than 1 M
Ω
?
Poor connection of
“RED/WHT” wire
terminal at HVAC
control module
connector, and/or HVAC
control module faulty. “RED/WHT” wire
shorted to ground.
4 1) With ignition switch ON position, check voltage between
“RED/WHT” wire terminal and “BLK/RED” wire terminal
at temperature control actuator connector.
Is voltage about 5 V?
Go to Step 5. “BLK/RED” wire open,
poor connection of
“BLK/RED” wire
terminal at HVAC
control module
connector, and/or HVAC
control module faulty.
5 1) With ignition switch ON position, check voltage between
“WHT” wire terminal and “BLK/RED” wire terminal at
temperature control actuator connector.
Is voltage about 5 V?
Go to Step 8. Go to Step 6.