Suzuki XL7 2007 Service Manual page 1859

Step
1. Allow the engine to idle.
2. Select the FLOOR mode.
3. Select the minimum blower speed.
4. Select the warmest temperature setting.
3
5. Feel the temperature of the inlet and outlet heater hoses at
the heater core.
Does the inlet heater hose feel warmer than the outlet heater
hose?
1. Install a thermometer into the center instrument panel air
outlet.
2. Secure a thermometer to the heater core outlet hose.
3. Select the PANEL mode.
4. Select the maximum blower speed.
4 5. Select the warmest temperature setting.
6. Record the temperature at the following locations:
– The center instrument panel air outlet
– The heater core outlet hose
7. Compare the recorded temperatures.
Are the 2 temperature readings about equal?
1. Inspect and repair the following areas of the vehicle for
cold air leaks:
– The cowl
5 – The recirculation door
– The HVAC module case
2. Perform the necessary repairs.
Are the repairs complete?
1. Inspect the temperature door operation. Refer to
"Diagnostic System Check - Vehicle Diagnostic
Information: ".
6
2. Perform any necessary repairs.
Are the repairs complete?
1. Turn OFF the engine.
2. Backflush the heater core.
3. Start the engine.
4. Select the FLOOR mode.
5. Select the minimum blower speed.
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6. Select the warmest temperature setting.
7. Feel the temperature of the inlet and outlet heater hoses at
the heater core.
Does the inlet heater hose feel warmer than the outlet heater
hose?
Replace the heater core. Refer to "Heater Core Replacement".
8
Is the repair complete?
Repair the low engine temperature concern. Refer to "Engine
9 Fails To Reach Normal Operating Temperature: ".
Is the repair complete?
Operate the system in order to verify the repair.
10
Did you find and correct the condition?
Action
Heating, Ventilation and Air Conditioning:
Yes
Go to Step 7
Go to Step 5
Go to Step 10
Go to Step 10
Go to Step 8
Go to Step 10
Go to Step 10
System OK
7A-45
No
Go to Step 4
Go to Step 6
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Go to Step 10
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Go to Step 2