Dtc B1501 (No.01): Outside Air Temperature Sensor And/Or Its Circuit Malfunction - Suzuki Liana RH413 Service Manual

Visual Inspection
Check visually the following parts and systems.
• Refrigerant ---- leakage and amount
• A/C pipe or hose ---- disconnection, looseness and deterioration
• A/C compressor drive belt ---- looseness and damage
• Battery ---- fluid level and corrosion of terminal
• Connectors of electric wire harness ---- disconnection and friction
• Fuses ---- burning
• Parts ---- installation and damage
• Other parts that can be checked visually

DTC B1501 (No.01): Outside Air Temperature Sensor and/or its Circuit Malfunction

Wiring Diagram
2
1. HVAC control module
DTC Detecting Condition and Trouble Area
• Outside air temperature signal is less than the specified (0.7 V). (Outside
air temperature is less than –44 °C, –111 °F.)
• Outside air temperature signal is more than the specified (3.3 V). (Outside
air temperature is more than 155 °C, 311 °F.)
DTC Troubleshooting
Step
1 1) Turn ignition switch OFF, and then disconnect outside air
temperature sensor connector referring to "Outside Air
Temperature Sensor Removal and Installation".
2) Turn ignition switch ON, and then check voltage
between "YEL/BLK" wire terminal at outside air
temperature sensor connector and body ground.
Is voltage about 3.5 V?
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 "YEL/BLK" wire terminal at
outside air temperature sensor connector and "YEL/
BLK" wire terminal at HVAC control module connector.
Is resistance less than 1 M
3 1) Check resistance between "YEL/BLK" wire terminal and
body ground.
Is resistance more than 1 M
Inspection item
G77-29
YEL/BLK
BLK/RED G77-9
2. Outside air temperature sensor
DTC Detecting Condition
Action
Ω
?
Ω
?
Air Conditioning System: Automatic Type 7B-54
Refer to "Quick Checking of Refrigerant
Charge".
Refer to "Compressor Drive Belt Inspection".
1
5V
29
3. HVAC control module connector "G77" (viewed from harness side)
Go to Step 4.
Go to Step 3.
Poor connection of
"YEL/BLK" wire terminal
at HVAC control module
connector, and/or HVAC
control module faulty.
Correction
3
9
Trouble Area
• "YEL/BLK" and/or "BLK/RED" wire
faulty
• Outside air temperature sensor
faulty
• HVAC control module faulty
Yes
Go to Step 2.
"YEL/BLK" wire open or
high resistance.
"YEL/BLK" wire shorted
to ground.
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S3RH0A7224011
I3RH0A722007-01
No