RM3660EC _58 Vehicle Interior _080733 HEATING / AIR CONDITIONING _0591215 AIR CONDITIONING SYSTEM(for Gasoline Model (NR Series) with Manual Air Conditioning System for Electrical Control Type) C

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for Gasoline Model (NR Series) with Manual Air Conditioning System for Electrical Control Type)  B1497  Communication Malfunction (Bus Ic)  


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
B1497 Communication Malfunction (Bus Ic) Error or open in communication line
·

Air conditioning harness assembly

·

No. 1 air conditioning radiator damper servo sub-assembly

·

Air conditioning amplifier 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

E419822E06
3.875,2.052 6.094,2.26 2.219,0.208 10 false Air Conditioning Amplifier Assembly 3.854,7.656 6.625,8.031 2.771,0.375 10 false No. 1 Air Conditioning Radiator Damper Servo Sub-assembly 1.542,7.635 3.802,7.844 2.26,0.208 10 false Air Conditioning Harness Assembly 3.875,1.656 4.354,1.823 0.479,0.167 10 false z1*2 5.479,1.01 5.958,1.177 0.479,0.167 10 false IC 4.104,0.5 4.583,0.667 0.479,0.167 10 false 2 4.302,0.5 4.781,0.667 0.479,0.167 10 false BUSG 4.292,0.896 4.771,1.063 0.479,0.167 10 false BUS 4.302,1.302 5.01,1.51 0.708,0.208 10 false BUSB 5.427,1.385 5.906,1.552 0.479,0.167 10 false +B 4.104,0.844 4.583,1.01 0.479,0.167 10 false 3 4.104,1.302 4.583,1.469 0.479,0.167 10 false 4 3.885,4.208 4.365,4.375 0.479,0.167 10 false GND 3.906,4.604 4.385,4.771 0.479,0.167 10 false LIN 3.885,5 4.365,5.167 0.479,0.167 10 false +B 4.542,4.656 5.021,4.823 0.479,0.167 10 false IC 6.094,4.302 6.615,4.531 0.521,0.229 10 false Air Mix 6.135,6.406 6.656,6.635 0.521,0.229 10 false Mode 0.51,8.24 2.229,8.438 1.719,0.198 10 false : LIN Communication Line 0.052,1.75 1.948,2.177 1.896,0.427 10 false No. 2 Air Conditioning Radiator Damper Servo Sub-assembly*2 0.115,6.594 1.604,6.833 1.49,0.24 10 false *1: w/o Rear Air Duct 0.115,7 1.521,7.271 1.406,0.271 10 false *2: w/ Rear Air Duct 3.875,1.844 4.354,2.01 0.479,0.167 10 false m3*1

PROCEDURE

1.CONFIRM MODEL
a.

Choose the model to be inspected.


Result:
Result Proceed to
w/ Rear Air Duct A
w/o Rear Air Duct B



A

2.PERFORM ACTIVE TEST USING GTS

B

7.PERFORM ACTIVE TEST USING GTS
2.PERFORM ACTIVE TEST USING GTS
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Air Conditioner / Active test.


e.

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
Air Outlet Servo Pulse (D) No. 1 air conditioning radiator damper servo sub-assembly pulse Min.: 128
Max.: 383 		Operates between 241 and 348 pulses
A/O Servo Pulse(Rr D) No. 2 air conditioning radiator damper servo sub-assembly pulse Min.: 128
Max.: 383 		Operates between 250 and 297 pulses
Body Electrical > Air Conditioner > Active Test
Tester Display
Air Outlet Servo Pulse (D)
50004 121 26
Body Electrical > Air Conditioner > Active Test
Tester Display
A/O Servo Pulse(Rr D)
50004 121 56

Result:
Result Proceed to
All of the damper servo motors are malfunctioning A
One of the damper servo motors is malfunctioning B



A

3.PERFORM ACTIVE TEST USING GTS

B

5.PERFORM ACTIVE TEST USING GTS
3.PERFORM ACTIVE TEST USING GTS
a.

Disconnect the No. 1 air conditioning radiator damper servo sub-assembly connector.


b.

Connect the GTS to the DLC3.


c.

Turn the ignition switch to ON.


d.

Turn the GTS on.


e.

Enter the following menus: Body Electrical / Air Conditioner / Active test.


f.

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
A/O Servo Pulse(Rr D) No. 2 air conditioning radiator damper servo sub-assembly pulse Min.: 128
Max.: 383 		Operates between 250 and 297 pulses
Body Electrical > Air Conditioner > Active Test
Tester Display
A/O Servo Pulse(Rr D)
50004 121 56
OK:

The damper servo motor operates smoothly.



Result:
Proceed to
OK
NG



OK

REPLACE NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for Gasoline Model)>DISASSEMBLY


NG

4.INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY
4.INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY
E389744C01
2.615,0.292 3.042,0.563 0.427,0.271 1.833,0.51 2.688,1.323 true 1.823,2.26 2.792,1.406 true 2.844,2.333 2.906,1.417 true 0.406,3.927 0.865,4.125 0.458,0.198 10 false GND 0.146,0.104 0.604,0.302 0.458,0.198 10 false *a 2.76,0.354 3.052,0.563 0.292,0.208 10 false z1 1.635,2.313 2.042,2.521 0.406,0.208 10 false BUS 1.583,0.323 2.167,0.531 0.583,0.208 10 false BUSB 2.635,2.375 3.219,2.583 0.583,0.208 10 false BUSG
*a Component with harness connected
(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.


a.

Disconnect the z1 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
z1-2 (BUSG) - 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
z1-4 (BUSB) - Body ground Ignition switch ON 11 to 14 V



d.

Turn the ignition switch to ON.


e.

Using an oscilloscope, check the waveform.

Item Content
Terminal No. z1-3 (BUS) - z1-2 (BUSG)
Tool Setting 2 V/DIV., 2 ms./DIV.
Condition Ignition switch ON

OK:

Waveform is similar to that shown in the illustration.


HINT:

The waveform varies with the blower speed.



Result:
Proceed to
OK
NG



OK

REPLACE AIR CONDITIONING HARNESS ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for Gasoline Model)>DISASSEMBLY


NG

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

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


5.PERFORM ACTIVE TEST USING GTS
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Air Conditioner / Active test.


e.

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
Air Outlet Servo Pulse (D) No. 1 air conditioning radiator damper servo sub-assembly pulse Min.: 128
Max.: 383 		Operates between 241 and 348 pulses
A/O Servo Pulse(Rr D) No. 2 air conditioning radiator damper servo sub-assembly pulse Min.: 128
Max.: 383 		Operates between 250 and 297 pulses
Body Electrical > Air Conditioner > Active Test
Tester Display
Air Outlet Servo Pulse (D)
50004 121 26
Body Electrical > Air Conditioner > Active Test
Tester Display
A/O Servo Pulse(Rr D)
50004 121 56

Result:
Result Proceed to
Only the No. 2 air conditioning radiator damper servo sub-assembly operates A
Only the No. 1 air conditioning radiator damper servo sub-assembly operate B



A

6.INSPECT AIR CONDITIONING HARNESS ASSEMBLY (AIR CONDITIONING AMPLIFIER ASSEMBLY - NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY)

B

REPLACE AIR CONDITIONING HARNESS ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for Gasoline Model)>DISASSEMBLY


6.INSPECT AIR CONDITIONING HARNESS ASSEMBLY (AIR CONDITIONING AMPLIFIER ASSEMBLY - NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY)
a.

Disconnect the z1 air conditioning amplifier assembly connector.


b.

Disconnect the No. 1 air conditioning radiator damper servo sub-assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
z1-2 (BUSG) - A-3 (GND) Always Below 1 Ω
z1-3 (BUS) - A-2 (LIN) Always Below 1 Ω
z1-4 (BUSB) - A-1 (+B) Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for Gasoline Model)>DISASSEMBLY


NG

REPLACE AIR CONDITIONING HARNESS ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for Gasoline Model)>DISASSEMBLY


7.PERFORM ACTIVE TEST USING GTS
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Air Conditioner / Active test.


e.

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
Air Outlet Servo Pulse (D) No. 1 air conditioning radiator damper servo sub-assembly pulse Min.: 128
Max.: 383 		Operates between 241 and 348 pulses
Body Electrical > Air Conditioner > Active Test
Tester Display
Air Outlet Servo Pulse (D)
50004 121 26
OK:

The damper servo motor operates smoothly.



Result:
Proceed to
OK
NG



OK

8.INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

REPLACE NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for Gasoline Model)>DISASSEMBLY


8.INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY
E389744C02
2.615,0.292 3.042,0.563 0.427,0.271 1.833,0.51 2.688,1.323 true 1.823,2.26 2.792,1.406 true 2.844,2.333 2.906,1.417 true 0.406,3.927 0.865,4.125 0.458,0.198 10 false GND 0.146,0.104 0.604,0.302 0.458,0.198 10 false *a 2.729,0.344 3.021,0.552 0.292,0.208 10 false m3 1.635,2.313 2.042,2.521 0.406,0.208 10 false BUS 1.583,0.323 2.167,0.531 0.583,0.208 10 false BUSB 2.635,2.375 3.219,2.583 0.583,0.208 10 false BUSG
*a Component with harness connected
(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.


a.

Disconnect the m3 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
m3-2 (BUSG) - 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
m3-4 (BUSB) - Body ground Ignition switch ON 11 to 14 V



d.

Turn the ignition switch to ON.


e.

Using an oscilloscope, check the waveform.

Item Content
Terminal No. m3-3 (BUS) - m3-2 (BUSG)
Tool Setting 2 V/DIV., 2 ms./DIV.
Condition Ignition switch ON

OK:

Waveform is similar to that shown in the illustration.


HINT:

The waveform varies with the blower speed.



Result:
Proceed to
OK
NG



OK

REPLACE AIR CONDITIONING HARNESS ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for Gasoline Model)>DISASSEMBLY


NG

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

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