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 |
Clearance Warning ECU Power Source Circuit
DESCRIPTION
This circuit provides power to operate the clearance warning ECU assembly.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following
inspection procedure.
PROCEDUR ...
Fail-safe Chart
FAIL-SAFE CHART
Engine Coolant Temperature Gauge
Condition
Response
Recovery
Engine coolant temperature data is interrupted for 3 seconds.
The gauge needle indicates below C.
Engine cool ...
Installation
INSTALLATION
CAUTION / NOTICE / HINT
HINT:
Perform "Inspection After Repair" after replacing the camshaft, No. 2 camshaft,
camshaft timing gear assembly or camshaft timing exhaust gear assembly (See page
).
PROCEDURE
1. INSTALL NO. 2 CAMSHAF ...