Suzuki 2006 SX4, Service Manual

Page: 926 / 1478

7B-61 Air Conditioning System: Automatic Type
DTC Troubleshooting
DTC B1511: Temperature Control Actuator (Position Sensor) and/or Its Circuit Malfunction
S6RW0C7224013
Wiring Diagram
Step Action Yes No
1 Was “Air Conditioning System Check” performed? Go to Step 2. Go to “Air Conditioning
System Check”.
2 Wire harness check
1) Turn ignition switch to OFF position.
2) Disconnect connectors from sunload sensor and HVAC
control module.
3) Check for proper connection to each signal circuit
terminal and ground circuit terminal of sunload sensor
and HVAC control module connectors.
4) If OK, check that sunload sensor circuit is as follows.
• Wiring harness resistance of each sunload sensor
signal circuit and ground circuit is less than 3
Ω
• Insulation resistance of each sunload sensor signal
circuit and ground circuit between sunload sensor
connector and vehicle body ground is Infinity
• Circuit voltage of each sunload sensor signal circuit
and ground circuit is 0 – 1 V with ignition switch turned
ON
Are they in good condition?
Go to Step 3. Sunload sensor power
supply circuit and/or
signal circuit are open,
short or high resistance.
3 Sunload sensor power supply voltage check
1) Connect connector to HVAC control module with ignition
switch turned OFF.
2) Turn ignition switch to ON position.
3) Measure voltage between signal terminal and ground
terminal of sunload sensor connector.
Is voltage 4.5 – 5.5 V?
Go to Step 4. Substitute a known-
good HVAC control
module and recheck.
4 Sunload sensor check
1) Check sunload sensor for performance referring to
“Sunload Sensor Inspection”.
Is it in good condition?
Substitute a known-
good HVAC control
module and recheck. Replace sunload
sensor.
G20
1 2 3 4 5 6 7 8 9 10 11 12 13 14
15 16 17 18 19 20 21 24 23 22 25 26 27 28 29 30
GRY/BLU
GRY/RED
5V
5V
12V
ORN
WHT
YEL
G20-12
G20-27
G20-24
G20-1
G20-2
2
[P]
[S]
3
4
[G]
1
I6RW0C722004-01
[P]: Position sensor power supply circuit [G]: Position sensor ground circuit 2. Temperature control actuator 4. To other sensors
[S]: Position sensor signal circuit 1. HVAC control module 3. To air flow control actuator