RM35X0E _58 Vehicle Interior _079316 HEATING / AIR CONDITIONING _0386652 AIR CONDITIONING SYSTEM(for Manual Air Conditioning System) C

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for Manual 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 Lost communication with integration control and panel assembly
·

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

E416665E02
5.615,0.479 6.073,0.677 0.458,0.198 10 false B 5.615,1.542 6.073,1.74 0.458,0.198 10 false RLIN 5.625,2.042 6.083,2.24 0.458,0.198 10 false GND 5.365,2.427 5.823,2.625 0.458,0.198 10 false N40 6.5,1.667 6.792,1.865 0.292,0.198 10 false AD 5.375,2.604 6.948,3.115 1.573,0.51 10 false Air Conditioning Amplifier Assembly 5.385,0.375 5.844,0.573 0.458,0.198 10 false 5 5.385,1.531 5.844,1.729 0.458,0.198 10 false 7 5.302,1.927 5.76,2.125 0.458,0.198 10 false 17 1.76,1.146 2.219,1.344 0.458,0.198 10 false 1 1.76,1.531 2.219,1.729 0.458,0.198 10 false 2 1.76,1.927 2.219,2.125 0.458,0.198 10 false 5 1.458,1.146 1.917,1.344 0.458,0.198 10 false IG 1.313,1.531 1.771,1.729 0.458,0.198 10 false RLIN 1.531,1.927 1.99,2.125 0.458,0.198 10 false E 0.458,1.677 0.917,1.875 0.458,0.198 10 false CPU 0.313,2.448 0.771,2.646 0.458,0.198 10 false a11 0.313,2.594 1.781,2.99 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 2.406,0.844 3.969,1.063 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 2.938,0.458 3.813,0.667 0.875,0.208 10 false from Battery 5.635,0.875 6.094,1.073 0.458,0.198 10 false IG+ 5.385,0.76 5.844,0.958 0.458,0.198 10 false 6

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.
E416670C01
1.469,0.219 1.969,0.469 0.5,0.25 0.49,0.531 0.74,0.531 0.74,0.531 0.938,1.021 true 2.885,0.542 2.635,0.542 2.635,0.542 2.479,1 true 1.594,0.26 2.021,0.469 0.427,0.208 10 false a11 2.948,0.448 3.24,0.646 0.292,0.198 10 false E 0.281,0.458 0.708,0.667 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
a11-5 (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
a11-1 (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 N40 air conditioning amplifier assembly connector.


b.

Disconnect the a11 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
N40-7 (RLIN) - a11-2 (RLIN) Always Below 1 Ω
N40-7 (RLIN) or a11-2 (RLIN) - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

3.CHECK INTEGRATION CONTROL AND PANEL ASSEMBLY (OUTPUT)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.CHECK INTEGRATION CONTROL AND PANEL ASSEMBLY (OUTPUT)
a.
E407118C05
0.417,0.5 0.917,0.75 0.5,0.25 2.458,1.104 2.208,1.104 2.208,1.104 1.99,0.719 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 2.51,1.021 2.865,1.219 0.354,0.198 10 false RLIN 0.542,0.552 0.854,0.75 0.313,0.198 10 false N40
*a Component with harness connected
(Air Conditioning Amplifier Assembly)


Using an oscilloscope, check the waveform.

Item Content
Tester Connection N40-7 (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