Suzuki XL7 2007 Service Manual page 1880

7A-66 Heating, Ventilation and Air Conditioning:
Circuit/System Testing
1. Ignition OFF, disconnect the appropriate sunload
sensor harness connector at the sunload / ambient
light sensor.
2. Test for less than 1.0 ohm of resistance between the
ground circuit terminal C and ground.
➢ If greater than the specified range, test the ground
circuit terminal C for an open/high resistance.
3. Ignition ON, verify the appropriate sunload sensor
parameter listed below is greater than 250 counts.
– Driver sunload sensor signal circuit terminal A at
the sunload / ambient light sensor.
– Passenger sunload sensor signal circuit terminal
B at the sunload / ambient light sensor.
➢ If not the specified value, test the appropriate signal
circuit terminal A or B for a short to ground. If the
circuit tests normal, replace the HVAC control
module.
4. Install a 3A fused jumper wire between the ground
circuit terminal C and the signal circuit terminal of the
appropriate sensor circuit listed below. Verify the
appropriate sunload sensor parameter is less than 5
counts.
– Driver sunload sensor signal circuit terminal A at
the sunload / ambient light sensor.
– Passenger sunload sensor signal circuit terminal
B at the sunload / ambient light sensor.
➢ If not the specified value, test the signal circuit for a
short to voltage or an open/high resistance. If the
circuit tests normal, replace the HVAC control
module.
5. If all circuits test normal, test or replace the sunload
sensor / ambient light sensor.
Repair Instructions
Perform the "Diagnostic Repair Verification - Vehicle
Diagnostic Information: " after completing the diagnostic
procedure.
• "Ambient Light Sensor Replacement: "
• "Control Module References: " for HVAC control
module replacement, setup and programming
Afterblow Enabling
The afterblow mode can be enabled using the scan tool.
The afterblow mode allows the blower motor to operate
after the engine has been turned off. This operation of
the blower motor dries the evaporator core, which
reduces the amount of microbial growth which can
create undesirable odors.
Use the following procedure in order to enable the
afterblow mode:
1. Connect the Scan Tool.
2. Turn ON the ignition, with the engine OFF.
3. Select HVAC Module.
4. Select HVAC Systems Automatic.
5. Select BCM.
6. Select Module Setup.
7. Select Afterblow Option.
8. Upon selecting the afterblow option a asterix will
appear next to the word afterblow meaning the
function is enabled.
9. Select the save option in the lower left of the screen.
When afterblow has been enabled by the scan tool the
blower motor will operate for roughly 2 to 4 minutes after
the engine has been in Key OFF for 30 minutes.
The following conditions must be met for the HVAC
module to operate the afterblow:
• The outside air temperature must be at least 21°C
(70°F).
• The A/C compressor must have operated during the
latest key cycle.
• The engine must be turned off for at least 30 minutes.
• The system voltage must be at least 12 volts.
Actuator Recalibration
When replacing the HVAC control module it will be
necessary to allow the HVAC control module to perform
a calibration process. When installing the HVAC control
module be sure to perform the following:
NOTE
Do not adjust any controls on the HVAC
control module while the HVAC control
module is self-calibrating. If interrupted,
improper HVAC performance will result.
1. Place the ignition switch to the OFF position.
2. Disconnect the scan tool.
3. Install the HVAC control module.
4. Connect all previously disconnected components.
5. Start the vehicle.
6. Wait 40 seconds for the HVAC control module to
self-calibrate.
7. Verify that no DTCs have set as current DTCs.