- Mode rear damper servo
- No.2 air conditioning harness
- Harness or connector between No. 2 air conditioning harness and air conditioning amplifier
- Air conditioning amplifier
| Last Modified: 11-29-2007 | 1.6 C | |
| Service Category: Vehicle Interior | Section: Heating/Air Conditioning | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000003F03000X |
| Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
DTC |
B1449/49 |
Rear Air Outlet Damper Control Servo Motor Circuit |
DESCRIPTION
The mode rear damper servo sends pulse signals to inform the air conditioning amplifier of the damper position. The air conditioning amplifier activates the motor (normal or reverse) based on the signals to move the rear air outlet damper to the appropriate position, which controls the air outlet modes.
HINT:
Confirm that no mechanical problem is present because this diagnostic code can be output when either a damper link or damper is mechanically locked.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B1449/49 |
Mode rear damper position does not change even if air conditioning amplifier operates rear air outlet damper servo motor |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM (AIR OUTLET SERVO PULSE (R)) |
(a) Connect the Techstream to DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Air Conditioner / Data List / Air Outlet Servo Pulse (R).
(e) According to the display on the Techstream, read the Data List.
Air Conditioner
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Air Outlet Servo Pulse (R) |
Rear air outlet servo motor target pulse / Min.: 0 Max.: 255 |
Customized value will be displayed |
- |
OK:
The display is as specified in the normal condition.
Result
|
Result |
Proceed to |
|---|---|
|
NG |
A |
|
OK (When troubleshooting according to Problem Symptoms Table) |
B |
|
OK (When troubleshooting according to the DTC output) |
C |
|
|
2. |
CHECK HARNESS AND CONNECTOR (NO. 2 AIR CONDITIONING HARNESS - AIR CONDITIONING AMPLIFIER) |
|
(a) Disconnect the P9 No. 2 air conditioning harness connector. |
(b) Disconnect the H67 air conditioning amplifier connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
P9-2 (RBUG) - H67-21 (RBUG) |
Always |
Below 1 Ω |
|
P9-3 (RBUS) - H67-1 (RBUS) |
Always |
Below 1 Ω |
|
P9-4 (RBBU) - H67-23 (RBBU) |
Always |
Below 1 Ω |
|
H67-21 (RBUG) - Body ground |
Always |
10 kΩ or higher |
|
H67-1 (RBUS) - Body ground |
Always |
10 kΩ or higher |
|
H67-23 (RBBU) - Body ground |
Always |
10 kΩ or higher |
(d) Reconnect the air conditioning amplifier connector.
(e) Reconnect the No. 2 air conditioning harness connector.
|
|
3. |
REPLACE MODE REAR DAMPER SERVO |
(a) Replace the mode rear damper servo motor
.
HINT:
Since the damper servo cannot be inspected while it is removed from the vehicle, replace the damper servo with a normal one.
|
|
4. |
CHECK FOR DTC |
(a) Clear the DTCs
.
(b) Check for DTCs
.
OK:
DTC is not output.
|
|
5. |
REPAIR OR REPLACE NO. 2 AIR CONDITIONING HARNESS |
(a) Repair or replace No. 2 air conditioning harness
.
|
|
6. |
CHECK FOR DTC |
(a) Clear the DTCs
.
(b) Check for DTCs
.
OK:
DTC is not output.
|
|
|