| Last Modified: 11-20-2023 | 6.11:8.1.0 | Doc ID: RM1000000013M8D |
| Model Year Start: 2018 | Model: Camry | Prod Date Range: [03/2017 - ] |
| Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System): B14B2; Lost Communication with Front Panel LIN; 2018 - 2024 MY Camry [03/2017 - ] | ||
|
DTC |
B14B2 |
Lost Communication with Front Panel LIN |
DESCRIPTION
The air conditioning control assembly communicates with the air conditioning amplifier assembly via LIN communication.
If a malfunction occurs in the LIN communication system, the air conditioning amplifier assembly will not operate, even if the air conditioning control assembly is operated.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Memory |
|---|---|---|---|---|
|
B14B2 |
Lost Communication with Front Panel LIN |
Lost communication with air conditioning control assembly |
|
Memorized (10 sec. or more)* |
- *: The air conditioning amplifier assembly stores this DTC if the malfunction has occurred for the period of time indicated in the brackets.
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY - IG POWER SOURCE) |
(a) Disconnect the K26 air conditioning control assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
K26-2 (IG+) - Body ground |
Ignition switch ON |
11 to 14 V |
|
K26-2 (IG+) - Body ground |
Ignition switch off |
Below 1 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
2. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY - BODY GROUND) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
K26-6 (GND) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY - AIR CONDITIONING AMPLIFIER ASSEMBLY) |
(a) Disconnect the K54 air conditioning amplifier assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
K26-9 (LIN1) - K54-14 (LIN1) |
Always |
Below 1 Ω |
|
K26-9 (LIN1) or K54-14 (LIN1) - Other terminals and body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY |
(a) Connect the K54 air conditioning amplifier assembly connector.
(b) Turn the ignition switch to ON.
(c) Using a Techstream, check the waveform.
OK:
Waveform is similar to that shown in the illustration.
|
Item |
Content |
|---|---|
|
Terminal No. |
K54-14 (LIN1) - Body ground |
|
Tool Setting |
2 V/DIV., 20 ms./DIV. |
|
Condition |
Ignition switch ON |
| NG |
|
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY
|
![2018 MY Camry [03/2017 - 06/2017]; HEATING / AIR CONDITIONING: AIR CONDITIONING AMPLIFIER: REMOVAL](/t3Portal/stylegraphics/info.gif)
|
|
5. |
INSPECT AIR CONDITIONING CONTROL ASSEMBLY |
(a) Connect the K26 air conditioning control assembly connector.
(b) Turn the ignition switch to ON.
(c) Using a Techstream, check the waveform.
OK:
Waveform is similar to that shown in the illustration.
|
Item |
Content |
|---|---|
|
Terminal No. |
K26-9 (LIN1) - Body ground |
|
Tool Setting |
2 V/DIV., 20 ms./DIV. |
|
Condition |
Ignition switch ON |
| OK |
|
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY
|
| NG |
|
REPLACE AIR CONDITIONING CONTROL ASSEMBLY
|
|
|