DESCRIPTION
The damper servo sub-assembly (front passenger side air mix damper servo) sends pulse signals to inform the No. 1 air conditioning amplifier assembly of the damper position. The No. 1 air conditioning amplifier assembly activates the motor (normal or reverse) based on the signals to move the air mix damper (for front passenger side) to any position. As a result, the air mix damper (for front passenger side) varies the mixture of hot air from the heater core and cold air from the evaporator so that the temperature of the air blowing toward the front passenger side is as requested.
HINT:
Confirm that no mechanical problem is present because this trouble code may be stored when either a damper link or damper is mechanically locked.
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
B1441/41 |
The air mix damper position does not change when the air conditioning amplifier assembly operates the damper servo sub-assembly (front passenger side air mix damper servo). |
|
WIRING DIAGRAM
PROCEDURE
1. |
READ VALUE USING TECHSTREAM (FRONT PASSENGER SIDE AIR MIX DAMPER SERVO) |
(a) Use the Data List to check if the damper servo sub-assembly (front passenger side air mix damper servo) is functioning properly (See page ).
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Air Mix Servo Targ Pulse (P) |
Damper servo sub-assembly (front passenger side air mix damper servo) target pulse / Min.: 0, Max.: 255 |
112 or 127 (pulse): MAX COOL 21 or 31 (pulse): MAX HOT |
- |
Air Mix Servo Actual Pulse (P) |
Damper servo sub-assembly (front passenger side air mix damper servo) actual pulse / Min.: 0, Max.: 255 |
112 or 127 (pulse): MAX COOL 21 or 31 (pulse): MAX HOT |
- |
OK:
The display is as specified in the normal condition column.
Result
Result |
Proceed to |
---|---|
OK (When troubleshooting according to problem symptoms table) |
A |
OK (When troubleshooting according to the DTC) |
B |
NG |
C |
A |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
B |
REPLACE NO. 1 AIR CONDITIONING AMPLIFIER ASSEMBLY |
|
2. |
PERFORM ACTIVE TEST USING TECHSTREAM (FRONT PASSENGER SIDE AIR MIX DAMPER SERVO) |
(a) Select the Active Test, use the Techstream to generate a control command, and then check that the damper servo sub-assembly (front passenger side air mix damper servo) operates (See page ).
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
---|---|---|---|
Air Mix Servo Targ Pulse (P) |
Damper servo sub-assembly (front passenger side air mix damper servo) pulse |
Min.: 0, Max.: 255 |
- |
OK:
Damper servo sub-assembly (front passenger side air mix damper servo) operates normally.
OK |
REPLACE NO. 1 AIR CONDITIONING AMPLIFIER ASSEMBLY |
|
3. |
REPLACE DAMPER SERVO SUB-ASSEMBLY (FRONT PASSENGER SIDE AIR MIX DAMPER SERVO) |
(a) Replace the damper servo sub-assembly (front passenger side air mix damper servo) (See page ).
HINT:
Since the damper servo sub-assembly (front passenger side air mix damper servo) cannot be inspected while it is removed from the vehicle, replace the damper servo sub-assembly (front passenger side air mix damper servo) with a new or normally functioning one.
|
4. |
CHECK FOR DTC |
(a) Clear the DTCs (See page ).
(b) Check for DTCs (See page ).
OK:
DTC B1441 is not output.
OK |
END (DAMPER SERVO SUB-ASSEMBLY [FRONT PASSENGER SIDE AIR MIX DAMPER SERVO] IS FAULTY) |
|
5. |
REPLACE NO. 1 AIR CONDITIONING AMPLIFIER ASSEMBLY |
(a) Temporarily replace the No. 1 air conditioning amplifier assembly with a new or normally functioning one (See page ).
|
6. |
CHECK FOR DTC |
(a) Clear the DTCs (See page ).
(b) Check for DTCs (See page ).
OK:
DTC B1441 is not output.
OK |
END (NO. 1 AIR CONDITIONING AMPLIFIER ASSEMBLY IS FAULTY) |
NG |
REPLACE AIR CONDITIONING HARNESS ASSEMBLY |
Master Cylinder Pressure Sensor Zero Point High Malfunction (C1422)
DESCRIPTION
Refer to DTCs C1421, C1423 and C1424 (See page
).
DTC Code
DTC Detection Condition
Trouble Area
C1422
When the stop light switch assembly is off, the PM/C1 terminal voltage
is 0.8 ...
Reassembly
REASSEMBLY
CAUTION / NOTICE / HINT
HINT:
When installing the back door outside garnish seal, heat the back door outside
garnish surface using a heat light.
Standard:
Item
Temperature
Back Door Outside Garnish
...