RM36D0EC _58 Vehicle Interior _083104 HEATING / AIR CONDITIONING _0402828 AIR CONDITIONING SYSTEM(for Gasoline Model) C

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for Gasoline Model)  B142A88  Servo Motor LIN Communication Bus off  


DESCRIPTION

The air conditioning harness assembly connects the air conditioning amplifier assembly and the servo motors. The air conditioning amplifier assembly supplies power and sends operation instructions to each servo motor through the air conditioning harness assembly. Each servo motor sends damper position information to the air conditioning amplifier assembly.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory
B142A88 Servo Motor LIN Communication Bus off
Diagnosis Condition:

Ignition switch ON


Malfunction Status:

Error or lost communication with each servo motor


Detection Time:

Continuously for 10 seconds or more


·

Air conditioning harness assembly

·

No. 1 air conditioning radiator damper servo sub-assembly

·

No. 2 air conditioning radiator damper servo sub-assembly

·

No. 3 air conditioning radiator damper servo sub-assembly

·

No. 1 blower damper servo sub-assembly

·

Air conditioning amplifier assembly


Memorized

DTC Detection Condition Combination Table
Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition Ignition switch ON ○ ○
Malfunction Error communication with each servo motor ○ -
Lost communication with each servo motor - ○
Detection Time Continuously for 10 seconds or more Continuously for 10 seconds or more
Trip Count 1 trip 1 trip

HINT:

If the conditions of either of these patterns are detected, a DTC will be stored


WIRING DIAGRAM

E403237E06
5.063,2.302 5.521,2.5 0.458,0.198 10 false z11 5.063,2.469 6.625,2.833 1.563,0.365 10 false Air Conditioning Amplifier Assembly 6.021,0.813 6.479,1.01 0.458,0.198 10 false IC 6.333,0.875 6.792,1.073 0.458,0.198 10 false +B 0.573,7.458 1.938,7.875 1.365,0.417 10 false No. 1 Blower Damper Servo Sub-assembly 0.302,2.458 1.354,2.833 1.052,0.375 10 false Front Passenger Side Air Mix*1 0.292,3.74 1.406,3.979 1.115,0.24 10 false Front Mode 0.188,4.781 2.583,5.323 2.396,0.542 10 false No. 1 Air Conditioning Radiator Damper Servo Sub-assembly 4.708,6.521 7.125,7.031 2.417,0.51 10 false No. 2 Air Conditioning Radiator Damper Servo Sub-assembly 2.573,7.667 4.865,8.177 2.292,0.51 10 false Air Conditioning Harness Assembly 0.906,8.573 3.167,8.792 2.26,0.219 10 false : LIN Communication Line 5.052,0.698 5.51,0.896 0.458,0.198 10 false BUS 5.052,1.115 5.51,1.313 0.458,0.198 10 false B BUS 5.052,1.479 5.51,1.677 0.458,0.198 10 false BUS G 4.802,0.656 5.26,0.854 0.458,0.198 10 false 3 4.813,1.094 5.271,1.292 0.458,0.198 10 false 4 4.813,1.49 5.271,1.688 0.458,0.198 10 false 2 0.635,0.792 1.333,1.167 0.698,0.375 10 false Driver Side Air Mix*1 5.979,5.531 6.719,5.76 0.74,0.229 10 false Rear Mode 0.719,1.396 1.417,1.771 0.698,0.375 10 false Air Mix*2 3.042,8.219 5.948,8.438 2.906,0.219 10 false *1: for Automatic Air Conditioning System 3.052,8.552 5.958,8.771 2.906,0.219 10 false *2: for Manual Air Conditioning System

CAUTION / NOTICE / HINT

NOTICE:

This DTC is also output when servomotor initialization has failed. When servomotor initialization has failed, repair any malfunctions and perform servomotor initialization again.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM (for Gasoline Model)>INITIALIZATION


PROCEDURE

1.PERFORM ACTIVE TEST USING GTS
a.

Perform the Active Test according to the display on the GTS.

Body Electrical > Air Conditioner > Active Test
Tester Display Measurement Item Control Range Diagnostic Note
Front Left Air Mix Damper Control Servo Motor No. 1 air conditioning radiator damper servo sub-assembly operation 128 to 384 Operates between 165 to 257
(for Automatic Air Conditioning System)
Front Right Air Mix Damper Control Servo Motor No. 1 air conditioning radiator damper servo sub-assembly operation 128 to 384 Operates between 255 to 347
(for Automatic Air Conditioning System)
Air Inlet Damper Control Servo Motor No. 1 blower damper servo sub-assembly operation 128 to 384 Operates between 235 to 258
Front Air Mix Damper Control Servo Motor No. 1 air conditioning radiator damper servo sub-assembly operation 128 to 384 Operates between 165 to 257
(for Manual Air Conditioning System)
Front Air Outlet Damper Control Servo Motor No. 1 air conditioning radiator damper servo sub-assembly operation 128 to 384 Operates between 234 to 348 pulses
Fr Control Rear Air Outlet Damper Servo Motor No. 2 air conditioning radiator damper servo sub-assembly pulse 128 to 384 Operates between 158 to 260
Body Electrical > Air Conditioner > Active Test
Tester Display
Front Left Air Mix Damper Control Servo Motor
50004 450 26
Body Electrical > Air Conditioner > Active Test
Tester Display
Front Right Air Mix Damper Control Servo Motor
50004 450 28
Body Electrical > Air Conditioner > Active Test
Tester Display
Air Inlet Damper Control Servo Motor
50004 450 32
Body Electrical > Air Conditioner > Active Test
Tester Display
Front Air Mix Damper Control Servo Motor
50004 450 46
Body Electrical > Air Conditioner > Active Test
Tester Display
Front Air Outlet Damper Control Servo Motor
50004 450 47
Body Electrical > Air Conditioner > Active Test
Tester Display
Fr Control Rear Air Outlet Damper Servo Motor
50004 450 49

Result:
Result Proceed to
All of the damper servo motors do not operate A
Any of the damper servo motors does not operate B
All of the damper servo motors operate C



A

2.CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

B

REPLACE AIR CONDITIONING HARNESS ASSEMBLY

for M20C-FKS:Vehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for M20C-FKS)>DISASSEMBLY

for M20D-FKS:Vehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for M20D-FKS)>DISASSEMBLY



C

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

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


2.CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY
NOTICE:

When inspecting the air conditioning amplifier assembly, do not bring the tester probes too close to each other as a short circuit may occur.


Pre-procedure1

a.

Disconnect the air conditioning amplifier assembly connector.


Procedure1

b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
z11-2 (BUS G) - Body ground Always Below 1 Ω



c.

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

Standard Voltage:
Tester Connection Condition Specified Condition
z11-4 (B BUS) - Body ground Always 11 to 14 V



d.
E407116C06
2.344,1.792 2.844,2.042 0.5,0.25 1.865,0.698 1.969,0.104 1.969,0.104 2.219,0.104 true 1.99,0.708 2.375,0.292 2.375,0.292 2.625,0.292 true 1.729,0.688 1.479,0.271 1.479,0.271 1.198,0.271 true 0.094,0.052 0.406,0.25 0.313,0.198 10 false *a 2.479,1.833 2.792,2.031 0.313,0.198 10 false z11 2.292,0.021 2.604,0.219 0.313,0.198 10 false BUS 2.677,0.208 3.208,0.417 0.531,0.208 10 false BUS G 0.396,3.938 0.927,4.146 0.531,0.208 10 false GND 0.75,0.188 1.281,0.396 0.531,0.208 10 false B BUS
*a Component with harness connected
(Air Conditioning Amplifier Assembly)


Using an oscilloscope, check the waveform.

OK:

Waveform is similar to that shown in the illustration.


Item Content
Terminal No. z11-3 (BUS) - z11-2 (BUS G)
Tool Setting 2 V/DIV., 2 ms./DIV.
Condition Always


Result:
Proceed to
OK
NG


Post-procedure1

e.

None



OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

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


NG

REPLACE AIR CONDITIONING HARNESS ASSEMBLY

for M20C-FKS:Vehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for M20C-FKS)>DISASSEMBLY

for M20D-FKS:Vehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for M20D-FKS)>DISASSEMBLY