AUTO A/C DIAGNOSIS
TSB Revision
AUTOMATIC AIR CONDITIONING
55B-81
STEP 2. Using scan tool MB991502, check data list item 32:
Mode selection damper control motor and potentiometer.
Check the data list.
Item 32: mode selection damper control motor and potentiome-
ter
Q: Does the data list show approximately 0% (at FACE
position), approximately 60% (at FOOT position),
approximately 80% (at FOOT/DEF position), and
approximately 100% (at DEF position)?
YES : It can be assumed that this malfunction is
intermittent. (Refer to GROUP 00 - How to Cope with
Intermittent Malfunction
P.00-6
.)
NO : Go to Step 3.
STEP 3. Using scan tool MB991502, check actuator test
item 08, item 09 and item 10: Blower motor
Item 08 (FACE), 09 (FOOT) and 10 (DEF): Blower motor
Q: Is the check result normal?
YES : Go to Step 7.
NO : Go to Step 4.