Suzuki XL7 2007 Service Manual page 1865

Noise Diagnosis - HVAC Module
Step
DEFINITION: Noise originating from the HVAC module.
Were you sent here from Symptoms or another diagnostic
1 table?
1. Start the engine.
2. Cycle through all of the following:
– Blower motor speeds
– HVAC modes
– Temperature control settings
2
3. Determine the type of noise:
– Scrape, pop
– Tick/click, chirp or groaning
– Air rush/whistle
Is a scrape or pop noise evident when selecting modes or
temperature settings?
Is a tick/click, chirping, groaning or scraping noise present, but
3
decreases as blower motor speed is decreased?
Is an air rush/whistle noise evident in all modes but not all
4
temperature settings?
Is an air rush/whistle noise evident only in defrost or floor
5
mode?
1. Remove the instrument panel accessory trim plate. Refer
to "Instrument Panel Accessory Trim Plate Replacement:
".
6
2. Remove the center air outlet duct.
Is the action complete?
1. Inspect the air flow doors for proper operation.
7
2. Inspect the ducts for obstructions or foreign materials.
Were any of these conditions found?
Inspect the mode and temperature doors and seals for
8 warping or cracking.
Are the doors in normal condition?
Replace the appropriate door and/or seals.
9
Is the repair complete?
Remove any obstructions or foreign material found.
10
Is the action complete?
1. Install the center air outlet duct.
2. Install the I/P accessory trim plate. Refer to "Instrument
11
Panel Accessory Trim Plate Replacement: ".
Is the action complete?
Operate the system to verify the repair.
12
Did you find and correct the condition?
Action
Heating, Ventilation and Air Conditioning:
Yes
Go to Step 2
Go to Step 6
Go to Step 6
Go to Step 6
Go to Step 6
Go to Step 7
Go to Step 10
Go to Step 11
Go to Step 11
Go to Step 11
Go to Step 12
System OK
7A-51
No
Go to "Symptoms -
HVAC Systems -
Automatic"
Go to Step 3
Go to Step 4
Go to Step 5
Go to Step 6
—
Go to Step 8
Go to Step 9
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—
—
Go to Step 2