DESCRIPTION
The air conditioning harness assembly connects the No. 1 air conditioning amplifier assembly and each servo motor. The No. 1 air conditioning amplifier assembly supplies power and sends operation instructions to each servo motor through the No. 1 air conditioning amplifier assembly. Each servo motor sends the damper position information to the No. 1 air conditioning amplifier assembly.
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
B1497 |
An open circuit or malfunction in the communication line. |
|
WIRING DIAGRAM
PROCEDURE
1. |
CHECK NO. 1 AIR CONDITIONING AMPLIFIER ASSEMBLY |
(a) Remove the No. 1 air conditioning amplifier assembly with its connectors still connected (See page ). |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
z15-2 (BUS G) - Body ground |
Always |
Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
z15-2 (BUS G) - z15-4 (B BUS) |
Always |
11 to 14 V |
z15-2 (BUS G) - z15-3 (BUS) |
Ignition switch ON |
Pulse generation |
*a |
Component with harness connected (No. 1 Air Conditioning Amplifier Assembly) |
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 AIR CONDITIONING HARNESS ASSEMBLY |
C |
REPLACE NO. 1 AIR CONDITIONING AMPLIFIER ASSEMBLY |
Air Conditioning Pressure Sensor
Components
COMPONENTS
ILLUSTRATION
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT NO. 1 PRESSURE SWITCH
(a) Connect a manifold gauge set.
(b) Connect the positive (+) lea ...
Disassembly
DISASSEMBLY
CAUTION / NOTICE / HINT
HINT:
Use the same procedure for the RH and LH sides.
The procedure listed below is for the LH side.
PROCEDURE
1. REMOVE STEP PLATE COVER LH
(a) Remove the 2 screws and step plate cover LH. ...