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Dtc B1511: Temperature Control Actuator (Position Sensor) And/Or Its Circuit Malfunction - Suzuki SX4 Service Manual

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7B-60 Air Conditioning System: Automatic Type

DTC B1511: Temperature Control Actuator (Position Sensor) and/or Its Circuit Malfunction

Wiring Diagram
2
GRY/BLU
GRY/RED
3
[P]
[S]
[G]
4
[P]: Position sensor power supply circuit
[S]: Position sensor signal circuit
DTC Detecting Condition and Trouble Area
Temperature control actuator position sensor signal voltage is higher than or
lower than specified value for specified time continuously.
DTC Troubleshooting
NOTE
• When DTC B1502, B1503, B1504 and B1512 are indicated together, it is possible that sensor ground
circuit is open.
• When DTC B1512 is indicated together, it is possible that position sensor power supply circuit is
open.
Step
1
Was "Air Conditioning System Check" performed?
2
Wire harness check
1) Turn ignition switch to OFF position.
2) Disconnect connectors from temperature control
actuator and HVAC control module.
3) Check for proper connection to position sensor power
supply, signal and ground circuit terminals of
temperature control actuator and HVAC control module
connectors.
4) If OK, check that position sensor of temperature control
actuator circuit is as follows.
• Wiring harness resistance of each position sensor
power supply, signal and ground circuit is less than 3
• Insulation resistance of each position sensor power
supply, signal and ground circuit is infinity between
temperature control actuator connector and vehicle
body ground
• Circuit voltage of each position sensor power supply,
signal and ground circuit is 0 - 1 V with ignition switch
turned ON
Are they in good condition?
1
12V
G20-1
G20-2
5V
5V
WHT
G20-12
YEL
G20-27
ORN
G20-24
[G]: Position sensor ground circuit
1. HVAC control module
DTC Detecting Condition
Action
14
13
12
11
10
9
8
30
29
28
27
26
25
24
2. Temperature control actuator
3. To air flow control actuator
Go to Step 2.
Go to Step 3.
G20
7
6
5
4
3
23
22
21
20
19
18
17
4. To other sensors
Trouble Area
• Temperature control actuator circuit
• Temperature control actuator
• HVAC control module
Yes
Go to "Air Conditioning
System Check:
Automatic Type".
Position sensor power
supply, signal circuit
and/or ground circuit are
open, short or high
resistance.
S7RW0A7224013
2
1
16
15
I6RW0C722004-01
No

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