RV METER
TSB Revision
CHASSIS ELECTRICAL
54A-219
STEP 3. Check the A/C-ECU.
CAUTION
To Prevent to damage to scan toll MB991502, always turn
the ignition switch to "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to "ON" position.
(3) Read the A/C diagnostic trouble code.
Q: Is A/C diagnostic trouble code 13 or 14 set?
YES : Go to Step 4.
NO : Go to Step 5.
STEP 4. Check the outside air temperature sensor.
(1) Remove the radiator grille. (Refer to
P.36-4
.)
(2) Remove the outside air temperature sensor.
(3) Measure the resistance between the outside air
temperature sensor terminals at two or more temperature
conditions.
Q: Does the resistance value exist within the characteristic
graph?
YES : There is no action to be taken.
NO : Replace the outside air temperature sensor.
ACX01539
16-pin
MB991502
AI
ACX2146 AB