SYSTEM DESCRIPTION
The ECM sends the engine speed signal to the air conditioning amplifier assembly via CAN communication.
The air conditioning amplifier assembly reads the difference between compressor speed and engine speed. When the difference becomes too large, the air conditioning amplifier assembly determines that the cooler compressor assembly is locked and turns the magnet clutch assembly off.
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
B1422 |
Open or short in the compressor lock sensor circuit. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
HINT:
As DTC B1422 is also output when the compressor drive belt is damaged or loose, inspect the belt before performing troubleshooting.
PROCEDURE
1. |
CHECK FOR DTC (CAN COMMUNICATION SYSTEM) |
(a) Use the Techstream to check if the CAN communication system is functioning normally.
Result
Result |
Proceed to |
---|---|
CAN DTC is not output |
A |
CAN DTC is output |
B |
B |
GO TO CAN COMMUNICATION SYSTEM |
|
2. |
INSPECT COOLER COMPRESSOR ASSEMBLY (A/C LOCK SENSOR) |
(a) Remove the cooler compressor assembly (A/C lock sensor) (See page ). |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
1 - 2 |
20°C (68°F) |
160 to 320 Ω |
NG |
REPLACE COOLER COMPRESSOR ASSEMBLY (A/C LOCK SENSOR) |
|
3. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - A/C LOCK SENSOR) |
(a) Disconnect the F42 amplifier connector.
(b) Disconnect the B41 sensor connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F42-8 (LOCK) - B41-1 |
Always |
Below 1 Ω |
F42-13 (SG-2) - B41-2 |
Always |
Below 1 Ω |
F42-8 (LOCK) - Body ground |
Always |
10 kΩ or higher |
F42-13 (SG-2) - Body ground |
Always |
10 kΩ or higher |
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 AMPLIFIER ASSEMBLY |
C |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Rear Suspension System
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms. If multiple
suspected areas are listed, the potential causes of the symptoms are listed in order
of probability in the "Suspe ...
Engine Immobiliser System Malfunction (B2799)
DESCRIPTION
This DTC is stored when one of the following occurs: 1) the ECM detects errors
in its own communications with the ID code box; 2) the ECM detects errors in the
communication lines; or 3) the ECU communication ID between the ID code box and
E ...