Suzuki XL7 2007 Service Manual page 1842

7A-28 Heating, Ventilation and Air Conditioning:
Circuit/System Verification
Ignition ON, Engine OFF, observe the Ambient Air
Temperature Sensor temperature through the Driver
Information Center (DIC). The reading should be the
ambient temperature setting. If the display of the DIC for
temperature reads dashes, check for a sensor signal
circuit fault.
Circuit/System Testing
1. Ignition OFF, disconnect the ambient air temp sensor
harness connector at the ambient air temp sensor
terminal A.
2. Test for less than 1.0 ohm of resistance between the
low reference circuit terminal B and ground.
➢ If greater than the specified value, test the low
reference circuit for an open / high resistance. If the
circuit tests normal, replace the HVAC control
module.
3. Ignition ON, test for 5 volts between the low
reference circuit terminal B and the 5-volt reference
signal terminal A.
➢ If not the specified voltage, test the signal circuit for
a short to voltage, short to ground or open/high
resistance. If the circuit tests normal, replace the
HVAC control module.
4. If all circuits test normal, replace the ambient air
temperature sensor.
Repair Instructions
NOTE
Always perform the "Diagnostic Repair
Verification - Vehicle Diagnostic Information:
" after completing the diagnostic procedure.
• "Ambient Air Temperature Sensor Replacement: "
• "Control Module References: " for HVAC control
module +replacement, setup, and programming
DTC B0228, B0413, B0423, B0433, B3779 or
B3782
Diagnostic Instructions
• Perform the "Diagnostic System Check - Vehicle
Diagnostic Information: " prior to using this diagnostic
procedure.
• "Strategy Based Diagnosis: "
• "Diagnostic Procedure Instructions - Vehicle
Diagnostic Information: "
DTC Descriptors
DTC B0228 02: Recirculate Position Feedback Circuit
Short to Ground
DTC B0228 04: Recirculate Position Feedback Circuit
Open
DTC B0228 05: Recirculate Position Feedback Circuit
Short to Battery
DTC B0228 61: Recirculate Position Feedback Circuit
Actuator Stuck
DTC B0413 02: Temperature Control 1 Circuit Short to
Ground
DTC B0413 04: Temperature Control 1 Feedback
Circuit Open Circuit
DTC B0413 05: Temperature Control 1 Feedback
Circuit Short to Battery or Open
DTC B0413 08: Temperature Control 1 Circuit Actuator
Signal Invalid
DTC B0413 61: Temperature Control 1 Feedback
Circuit Actuator Stuck
DTC B0423 02: Temperature Control 2 Circuit Short to
Ground
DTC B0423 04: Temperature Control 2 Feedback
Circuit Open Circuit
DTC B0423 05: Temperature Control 2 Feedback
Circuit Short to Battery or Open
DTC B0423 61: Temperature Control 2 Feedback
Circuit Actuator Stuck
DTC B0433 02: Temperature Control 3 Circuit Short to
Ground
DTC B0433 04: Temperature Control 3 Feedback
Circuit Open Circuit
DTC B0433 05: Temperature Control 3 Feedback
Circuit Short to Battery or Open
DTC B0433 61: Temperature Control 3 Feedback
Circuit Actuator Stuck
DTC B3779 02: Air Flow Control 9 Feedback Circuit
Short to Ground
DTC B3779 04: Air Flow Control 9 Feedback Circuit
Open Circuit
DTC B3779 05: Air Flow Control 9 Feedback Circuit
Short to Battery or Open
DTC B3779 61: Air Flow Control 9 Feedback Circuit
Actuator Stuck
DTC B3782 02: Air Flow Control 10 Feedback Circuit
Short to Ground
DTC B3782 04: Air Flow Control 10 Feedback Circuit
Open Circuit
DTC B3782 05: Air Flow Control 10 Feedback Circuit
Short to Battery or Open
DTC B3782 61: Air Flow Control 10 Feedback Circuit
Actuator Stuck