Dtc B1502: Inside Air Temperature Sensor And/Or Its Circuit Malfunction - Suzuki Swift Sport 2004 Service & Repair Manual

Step 7. Final confirmation test
Confirm if the problem symptom is troubleshoot and the A/C system is free from any abnormal conditions. If there
existed DTC, clear the DTC. Then, check if the DTC is still detected and if there is any other DTC.
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 B1502: Inside Air Temperature Sensor and/or Its Circuit Malfunction

Wiring Diagram
2
PNK/BLK
1. HVAC control module
DTC Detecting Condition and Trouble Area
Inside air temperature sensor signal voltage is higher than or lower than
specified value for specified time continuously.
DTC Troubleshooting
NOTE
When DTC B1503, B1513 and B1514 are indicated together, it is possible that "ORN" wire circuit open.
Step
1 Inside air temperature sensor signal circuit check
1) Disconnect inside air temperature sensor connector.
2) Check for proper connection to inside air temperature
sensor at "PNK/BLK" and "ORN" wire terminals.
3) If OK, measure voltage between "PNK/BLK" wire
terminal of inside air temperature sensor connector and
vehicle body ground with ignition switch turned ON.
Is voltage 4 – 6 V?
Inspection item
1
5V
G52-6
ORN G52-3
3
2. Inside air temperature sensor
DTC Detecting Condition
Action
Air Conditioning System: Automatic Type 7B-49
Correction
Refer to "Compressor Drive Belt Inspection and
Adjustment".
G52
8 7 6 5 4 3 2 1 10
16 15 14 13 12 11 10 9 20
3. To other sensors
• Inside air temperature sensor circuit
• Inside air temperature sensor
• HVAC control module
Yes
Go to Step 5.
S7RS0B7224009
S7RS0B7224010
G51
9 8 7 6 5 4 3 2 1
19 18 17 16 15 14 13 12 11
I5RS0A722010-01
Trouble Area
No
Go to Step 2.