DESCRIPTION
The air outlet control servo motor sends pulse signals to indicate the damper position to the A/C amplifier. The A/C amplifier activates the motor (normal or reverse) based on these signals to move the mode damper to any position, which controls the air outlet switching.
The A/C amplifier communicates with the servo through a communication/driver IC and wiring assembly called the air conditioning harness.
HINT:
Confirm that no mechanical problem is present because this DTC can be output when either a damper link or the damper is mechanically locked.
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
B1443/43 |
Air outlet damper position sensor value does not change even if A/C amplifier operates air outlet control servo motor |
|
WIRING DIAGRAM
PROCEDURE
1. |
READ VALUE USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Operate the MODE switch.
(e) Enter the following menus: Body / Air Conditioner / Data List.
(f) Check the value(s) by referring to the table below.
Air Conditioner
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Air Outlet Servo Pulse (D) |
Air outlet servo motor target pulse / Min.: 0, Max.: 255 |
FACE: 8 (pulse) B/L: 30 to 38 (pulse) FOOT: 50 to 74 (pulse) FOOT/DEF: 80 (pulse) DEF: 97 (pulse) |
- |
OK:
The display is as specified in the Normal Condition column.
Result |
Proceed to |
---|---|
NG |
A |
OK (When troubleshooting according to Problem Symptoms Table) |
B |
OK (When troubleshooting according to the DTC) |
C |
B | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
C | ![]() |
REPLACE A/C AMPLIFIER |
|
2. |
PERFORM ACTIVE TEST USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body / Air Conditioner / Active Test.
(e) Check the operation by referring to the table below.
Air Conditioner
Tester Display |
Test Part |
Control Rage |
Diagnostic Note |
---|---|---|---|
Air Outlet Servo Pulse (D) |
Air outlet servo motor pulse |
Min.: 0, Max.: 255 |
- |
OK:
Air flow position changes in accordance with each control range.
OK | ![]() |
REPLACE A/C AMPLIFIER |
|
3. |
INSPECT AIR OUTLET CONTROL SERVO MOTOR |
(a) Replace the No. 1 air mix control servo motor (air outlet control servo motor)
(See page ).
HINT:
Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known good one and check that the condition returns to normal.
(b) Check for the DTC.
Result |
Proceed to |
---|---|
DTC B1443/43 is output |
A |
DTC B1443/43 is not output |
B |
B | ![]() |
REPLACE AIR OUTLET CONTROL SERVO MOTOR |
|
4. |
INSPECT AIR CONDITIONING HARNESS |
(a) Replace the air conditioning harness (See page
).
HINT:
Since the air conditioning harness cannot be inspected while it is removed from the vehicle, replace the air conditioning harness with a new or a known good one and check that the condition returns to normal.
(b) Check for the DTC.
Result |
Proceed to |
---|---|
DTC B1443/43 is output |
A |
DTC B1443/43 is not output |
B |
A | ![]() |
REPLACE A/C AMPLIFIER |
B | ![]() |
REPLACE AIR CONDITIONING HARNESS |
Engine Hood Courtesy Switch Circuit
DESCRIPTION
The security courtesy switch is installed together with the hood lock. This switch
turns off when the engine hood is opened and turns on when the engine hood is closed.
WIRING DIAGRAM
PROCEDURE
1.
INSPECT HOOD LOCK AS ...
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
(a) Connect the Techstream to the DLC3.
(b) Start the engine and turn the Techstream on.
(c) Inspect the oil control valve (for intake camshaft).
(1) Enter the followin ...
Front Passenger Seat Belt Warning Light
Components
COMPONENTS
ILLUSTRATION
Installation
INSTALLATION
PROCEDURE
1. INSTALL ACCESSORY METER ASSEMBLY (w/o Rear View Monitor System)
(a) Connect the connector.
(b) Engage the 2 clamps.
(c) Engage the 2 clips.
(d) Install the accessory mete ...