RM35X0E _58 Vehicle Interior _079316 HEATING / AIR CONDITIONING _0386651 AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System) C

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System)  B14B3  Lost Communication with Rear Panel LIN  


DESCRIPTION

The integration control and panel assembly communicates with the air conditioning amplifier assembly via LIN communication.

If the LIN communication system malfunctions, the air conditioning amplifier assembly does not operate even if the integration control and panel assembly is operated.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory
B14B3 Lost Communication with Rear Panel LIN
·

Diagnosis condition: Ignition switch ON

·

Malfunction status: Lost communication with integration control and panel assembly

·

Detection time: Continuously for 10 seconds or more


·

Harness or connector

·

Integration control and panel assembly

·

Air conditioning amplifier assembly


Memorized

WIRING DIAGRAM

E418838E01
5.615,0.479 6.073,0.677 0.458,0.198 10 false +B2 5.615,1.625 6.073,1.823 0.458,0.198 10 false RLIN 5.625,2.271 6.083,2.469 0.458,0.198 10 false GND2 6.469,1.771 6.76,1.969 0.292,0.198 10 false IC 5.375,2.875 6.948,3.385 1.573,0.51 10 false Air Conditioning Amplifier Assembly 5.365,0.365 5.823,0.563 0.458,0.198 10 false 1 5.313,1.615 5.771,1.813 0.458,0.198 10 false 20 5.406,2.156 5.865,2.354 0.458,0.198 10 false 4 1.76,1.292 2.219,1.49 0.458,0.198 10 false 5 1.76,1.635 2.219,1.833 0.458,0.198 10 false 7 1.76,2.052 2.219,2.25 0.458,0.198 10 false 6 1.458,1.271 1.917,1.469 0.458,0.198 10 false IG 1.313,1.625 1.771,1.823 0.458,0.198 10 false RLIN 1.531,2.052 1.99,2.25 0.458,0.198 10 false E 0.458,1.677 0.917,1.875 0.458,0.198 10 false CPU 0.313,2.583 0.771,2.781 0.458,0.198 10 false a17 0.313,2.75 1.781,3.146 1.469,0.396 10 false Integration Control and Panel Assembly 0.781,3.479 2.823,3.677 2.042,0.198 10 false : LIN Communication Line 2.708,1.333 4.271,1.552 1.563,0.219 10 false from IG1 NO.3 Relay 4.063,0.646 5.073,0.854 1.01,0.208 10 false ECU-ALT NO.1 2.938,0.479 3.813,0.688 0.875,0.208 10 false from Battery 5.396,2.698 5.854,2.896 0.458,0.198 10 false N44

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses and relays for circuits related to this system before performing the following procedure.


PROCEDURE

1.CHECK HARNESS AND CONNECTOR (INTEGRATION CONTROL AND PANEL ASSEMBLY - BATTERY AND BODY GROUND)
a.
E418837C01
1.427,0.146 1.927,0.396 0.5,0.25 0.75,1.875 1,1.875 1,1.875 1.208,1.531 true 2.708,0.708 2.458,0.708 2.458,0.708 2.115,1.156 true 1.563,0.177 1.99,0.385 0.427,0.208 10 false a17 0.573,1.792 0.865,1.99 0.292,0.198 10 false E 2.76,0.604 3.188,0.813 0.427,0.208 10 false IG 0.063,0.052 0.49,0.26 0.427,0.208 10 false *a
*a Front view of wire harness connector
(to Integration Control and Panel Assembly)


Disconnect the integration control and panel assembly connector.


b.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
a17-6 (E) - 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
a17-5 (IG) - Body ground Ignition switch off Below 1 V
Ignition switch ON 11 to 14 V



Result:
Proceed to
OK
NG



OK

2.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - INTEGRATION CONTROL AND PANEL ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - INTEGRATION CONTROL AND PANEL ASSEMBLY)
a.

Disconnect the N44 air conditioning amplifier assembly connector.


b.

Disconnect the a17 integration control and panel assembly connector.


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
N44-20 (RLIN) - a17-7 (RLIN) Always Below 1 Ω
N44-20 (RLIN) or a17-7 (RLIN) - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

3.CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY
a.

Disconnect the a17 integration control and panel assembly connector.


b.
E418839C01
0.417,0.5 0.917,0.75 0.5,0.25 2.406,1.208 2.156,1.208 2.156,1.208 1.938,0.823 true 0.063,0.063 0.375,0.26 0.313,0.198 10 false *a 0.177,2.948 0.563,3.146 0.385,0.198 10 false GND 2.479,1.135 2.833,1.333 0.354,0.198 10 false RLIN 0.542,0.531 0.854,0.729 0.313,0.198 10 false N44
*a Component with harness connected
(Air Conditioning Amplifier Assembly)


Using an oscilloscope, check the waveform.

Item Content
Tester Connection N44-20 (RLIN) - Body ground
Tool Setting 2 V/DIV., 20 μs/DIV.
Condition Ignition switch ON

OK:

The waveform displays properly.



Result:
Proceed to
OK
NG



OK

4.CHECK INTEGRATION CONTROL AND PANEL ASSEMBLY

NG

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING AMPLIFIER>REMOVAL


4.CHECK INTEGRATION CONTROL AND PANEL ASSEMBLY
a.
E418839C01
0.417,0.5 0.917,0.75 0.5,0.25 2.406,1.208 2.156,1.208 2.156,1.208 1.938,0.823 true 0.063,0.063 0.375,0.26 0.313,0.198 10 false *a 0.177,2.948 0.563,3.146 0.385,0.198 10 false GND 2.479,1.135 2.833,1.333 0.354,0.198 10 false RLIN 0.542,0.531 0.854,0.729 0.313,0.198 10 false N44
*a Component with harness connected
(Air Conditioning Amplifier Assembly)


Using an oscilloscope, check the waveform.

Item Content
Tester Connection N44-20 (RLIN) - Body ground
Tool Setting 2 V/DIV., 20 μs/DIV.
Condition Ignition switch ON

OK:

The waveform displays properly.



Result:
Proceed to
OK
NG



OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING AMPLIFIER>REMOVAL


NG

REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING PANEL (for Rear)>REMOVAL