DESCRIPTION
The air conditioning control assembly communicates with the air conditioning amplifier assembly through the LIN communication system.
If the LIN communication system malfunctions, the air conditioning amplifier assembly does not operate even if the air conditioning control assembly is operated.
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
B14B3 |
Lost communication with the air conditioning control assembly. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
1. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY - POWER SOURCE CIRCUIT) |
(a) Disconnect the A33 air conditioning control assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
A33-8 (IG+) - Body ground |
Ignition switch off |
Below 1 V |
A33-8 (IG+) - Body ground |
Ignition switch ON |
11 to 14 V |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
A33-1 (GND) - Body ground |
Always |
Below 1 Ω |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
2. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY - AIR CONDITIONING AMPLIFIER ASSEMBLY) |
(a) Disconnect the A33 air conditioning control assembly connector.
(b) Disconnect the A36 air conditioning amplifier assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
A33-2 (STX) - A36-11 (LIN1) |
Always |
Below 1 Ω |
A33-2 (STX) or A36-11 (LIN1) - Body ground |
Always |
10 kΩ or higher |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
REPLACE AIR CONDITIONING CONTROL ASSEMBLY |
(a) Replace the air conditioning control assembly (See page
).
HINT:
Since the air conditioning control assembly cannot be inspected while it is removed from the vehicle, replace the air conditioning control assembly with a new or known good one and same problem occurs again.
OK:
Same problem does not occurs.
Result |
Proceed to |
---|---|
OK |
A |
NG (When troubleshooting according to Problem Symptoms Table) |
B |
NG (When troubleshooting according to the DTC) |
C |
A | ![]() |
END (AIR CONDITIONING CONTROL ASSEMBLY WAS DEFECTIVE) |
B | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
C | ![]() |
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY |
System Diagram
SYSTEM DIAGRAM
Communication Table
Sender
Receiver
Signal
Communication Method
Power window regulator master switch assembly*1
Main Body ECU (Multiplex Network Body ECU)
Door control switch signal
...
Reassembly
REASSEMBLY
PROCEDURE
1. INSTALL NO. 3 REAR BODY NAME PLATE (for 2GR-FKS)
2. INSTALL NO. 2 REAR BODY NAME PLATE (for 4WD)
3. INSTALL SIDE GATE SUPPORT FEMALE HINGE RH
(a) Engage the claw to install the side gate support female hinge RH.
...
Lost Communication with Yaw Rate Sensor Module (U0123,U0126,U0129,U0142,U0155)
DESCRIPTION
These DTCs are output when a communication malfunction occurs between the sensors
and ECUs.
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
U0123
Lost Communication with Yaw Rate Sensor Module
...