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

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System)  Clock Communication Error  


WIRING DIAGRAM

E401193E07
5.25,2.688 6.708,3.052 1.458,0.365 10 false Integration Control and Panel Assembly 5.229,2.521 5.646,2.698 0.417,0.177 10 false a17 5.594,1.521 6.104,1.74 0.51,0.219 10 false CXPI 5.313,1.344 5.823,1.563 0.51,0.219 10 false 8 0.396,2.479 0.813,2.656 0.417,0.177 10 false N22 0.396,2.635 2.604,2.969 2.208,0.333 10 false Combination Meter Assembly 1.896,1.344 2.313,1.521 0.417,0.177 10 false 28 1.479,1.521 1.99,1.74 0.51,0.219 10 false CXPI 0.844,3.313 3.052,3.646 2.208,0.333 10 false : CXPI Communication Line

CAUTION / NOTICE / HINT

NOTICE:

When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.


PROCEDURE

1.CHECK METER / GAUGE SYSTEM
a.

Check if the clock function in the combination meter assembly operates normally.

OK:

The clock function in the combination meter assembly operates normally.



Result:
Proceed to
OK
NG



OK

2.CHECK COMBINATION METER ASSEMBLY (OUTPUT WAVEFORM)

NG

GO TO METER / GAUGE SYSTEM

Click hereVehicle Interior>METER / GAUGE / DISPLAY>METER / GAUGE SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING


2.CHECK COMBINATION METER ASSEMBLY (OUTPUT WAVEFORM)
a.
E421587C01
1.438,0.333 1.938,0.583 0.5,0.25 2.167,2.281 1.917,2.281 1.917,2.281 1.667,1.75 true 0.115,3.74 0.573,3.938 0.458,0.198 10 false GND 0.063,0.052 0.521,0.25 0.458,0.198 10 false *a 1.563,0.375 2.021,0.573 0.458,0.198 10 false a17 2.26,2.188 2.719,2.385 0.458,0.198 10 false CXPI
*a Front view of wire harness connector
(to Integration Control and Panel Assembly)


Check the output waveform.

i.

Disconnect the integration control and panel assembly connector.


ii.

Connect an oscilloscope to terminal 8 (CXPI) and body ground.


iii.

Turn the ignition switch to ON.


iv.

Check the signal waveform according to the condition(s) in the table below.

Item Condition
Terminal No. a17-8 (CXPI) - Body ground
Tool Setting 2 V/DIV., 20 μs./DIV.
Vehicle Condition Ignition switch ON

OK:

The waveform is similar to that shown in the illustration.


HINT:

The waveform varies depending on the CXPI communication signal.




Result:
Proceed to
OK
NG



OK

REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY

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


NG

3.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - INTEGRATION CONTROL AND PANEL ASSEMBLY)
3.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - INTEGRATION CONTROL AND PANEL ASSEMBLY)
a.

Disconnect the N22 combination meter 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
N22-28 (CXPI) - a17-8 (CXPI) Always Below 1 Ω
N22-28 (CXPI) - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE COMBINATION METER ASSEMBLY

Click hereVehicle Interior>METER / GAUGE / DISPLAY>COMBINATION METER>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR