RM35X0E _53 Suspension _078885 TIRE PRESSURE MONITORING _0382739 TIRE PRESSURE WARNING SYSTEM C

TIRE PRESSURE MONITORING  TIRE PRESSURE WARNING SYSTEM  C2179  Tire Pressure Monitor ECU Communication Stop  


DESCRIPTION

The main body ECU (multiplex network body ECU) sends signals to the tire pressure warning ECU and receiver via a direct line.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
C2179 Tire Pressure Monitor ECU Communication Stop Communication between the main body ECU (multiplex network body ECU) and tire pressure warning ECU and receiver is interrupted for 10 seconds or more.
·

Main body ECU (Multiplex network body ECU)

·

Wire harness or connector

·

Tire pressure warning ECU and receiver


-

WIRING DIAGRAM

C420987E02
2.219,0.5 3.271,0.729 1.052,0.229 10 false ECU-IG1 NO. 4 3.74,0.167 4.052,0.365 0.313,0.198 10 false *2 2.438,1.198 3.052,1.396 0.615,0.198 10 false IG41 2.865,1.063 3.021,1.26 0.156,0.198 10 false 3 2.469,1.938 2.927,2.135 0.458,0.198 10 false B41 2.854,1.792 3.01,1.99 0.156,0.198 10 false 2 3.625,1.344 3.938,1.542 0.313,0.198 10 false *1 3.625,2.063 3.938,2.26 0.313,0.198 10 false *1 3.635,3.135 3.948,3.333 0.313,0.198 10 false *2 4.49,1.083 4.646,1.281 0.156,0.198 10 false 1 4.625,1.802 4.781,2 0.156,0.198 10 false 7 4.958,1.219 5.271,1.417 0.313,0.198 10 false IG 4.938,1.938 5.25,2.135 0.313,0.198 10 false +B 0.875,2.427 1.292,2.646 0.417,0.219 10 false N33 0.875,2.667 5.458,2.865 4.583,0.198 10 false Engine Stop and Start ECU (*1) 2.042,3.438 3.51,3.667 1.469,0.229 10 false ECU-B NO. 3 (*2, *3) 2.021,3.74 3.594,3.969 1.573,0.229 10 false ECU-B NO. 1 (*2, *4) 1.542,4.771 2,4.969 0.458,0.198 10 false CPU 2.406,4.552 2.865,4.75 0.458,0.198 10 false PRG 2.885,4.542 3.198,4.74 0.313,0.198 10 false 11 0.479,5.323 0.938,5.521 0.458,0.198 10 false N20 0.448,5.563 3.854,5.844 3.406,0.281 10 false Main body ECU (Multiplex Network Body ECU) 4.917,4.583 5.688,4.781 0.771,0.198 10 false PRG*3 4.917,4.833 5.833,5.031 0.917,0.198 10 false PRG2*4 4.656,4.542 4.813,4.74 0.156,0.198 10 false 5 4.396,5.521 5.24,5.76 0.844,0.24 10 false Z3*4, Z30*3 4.396,5.74 7,6.042 2.604,0.302 10 false Tire Pressure Warning ECU and Receiver 0.167,6.188 4.448,6.385 4.281,0.198 10 false *1: w/ Stop and Start System 0.177,6.604 4.615,6.802 4.438,0.198 10 false *2: w/o Stop and Start System 0.177,7.115 2.771,7.365 2.594,0.25 10 false *3: Integration Type 0.156,7.646 6.458,8.271 6.302,0.625 10 false *4: Non-Integration Type

CAUTION / NOTICE / HINT

NOTICE:
·

When replacing the tire pressure warning ECU and receiver, read the transmitter IDs and number of the transmitters (4 or 5) stored in the old ECU using the GTS and write them down before removal.

·

It is necessary to perform initializationSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING SYSTEM>INITIALIZATION after registrationSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING SYSTEM>REGISTRATION of the transmitter IDs into the tire pressure warning ECU and receiver after the ECU has been replaced.

·

w/ Entry and Start System:

Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.



PROCEDURE

1.INSPECT MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (OUTPUT WAVEFORM)
a.
C385231C20
1.219,0.219 1.615,0.448 0.396,0.229 0.865,1.729 1.156,1.094 true 0.208,0.229 0.521,0.427 0.313,0.198 10 false *a 2.875,3.406 3.188,3.604 0.313,0.198 10 false *b 0.719,1.771 1.125,2 0.406,0.229 10 false PRG 1.292,0.25 1.698,0.479 0.406,0.229 10 false N20
*a Component with harness connected
(Main Body ECU (Multiplex Network Body ECU))
*b GND


Using an oscilloscope, check the waveform.

NOTICE:

With the connector connected, check from the backside of the connector.


Standard Voltage:
Tester Connection Tool Setting Range Condition Specified Condition
N20-11 (PRG) - Body ground 5 V/DIV.5 ms./DIV. Ignition switch ON Waveform generation



Result:
Result Proceed to
Waveform is as shown in the illustration. (Waveform alternates between 9.8 V or higher and 1.2 V or less) A
Waveform does not change from 9.8 V or higher B
Waveform does not change from 1.2 V or less C



A

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

for Standard Roof:

Click hereSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING RECEIVER (for Standard Roof)>REMOVAL

for High Roof:

Click hereSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING RECEIVER (for High Roof)>REMOVAL


B

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for RHD)>REMOVAL


C

2.CHECK TERMINAL VOLTAGE (TIRE PRESSURE WARNING ECU AND RECEIVER OUTPUT)
2.CHECK TERMINAL VOLTAGE (TIRE PRESSURE WARNING ECU AND RECEIVER OUTPUT)
a.

Disconnect the main body ECU (multiplex network body ECU) connector.


b.

Turn the ignition switch to ON.


c.
C409417C03
0.271,1.042 0.729,1.313 0.458,0.271 2.094,1.188 2.167,0.417 2.167,0.417 2.333,0.417 true 0.135,0.083 0.448,0.281 0.313,0.198 10 false *a 0.375,1.083 0.833,1.281 0.458,0.198 10 false N20 2.406,0.344 2.865,0.542 0.458,0.198 10 false PRG
*a Front view of wire harness connector
(to Main Body ECU (Multiplex Network Body ECU))


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

Standard Voltage:
Tester Connection Condition Specified Condition
N20-11 (PRG) - Body ground Ignition switch ON 9.8 V or higher



Result:
Proceed to
OK
NG



OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for RHD)>REMOVAL


NG

3.CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING ECU AND RECEIVER - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))
3.CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING ECU AND RECEIVER - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))
a.

Turn the ignition switch off.


b.

Disconnect the Z3*1 or Z30*2 tire pressure warning ECU and receiver connector.

*1: Non-Integration Type

*2: Integration Type:



c.

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

Standard Resistance:
Non-Integration Type:
Tester Connection Condition Specified Condition
Z3-5 (PRG2) - N20-11 (PRG) Always Below 1 Ω
Z3-5 (PRG2) or N20-11 (PRG) - Body ground Always 10 kΩ or higher

Integration Type:
Tester Connection Condition Specified Condition
Z30-5 (PRG) - N20-11 (PRG) Always Below 1 Ω
Z30-5 (PRG) or N20-11 (PRG) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

4.CHECK HARNESS AND CONNECTOR (POWER SUPPLY - TIRE PRESSURE WARNING ECU AND RECEIVER)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.CHECK HARNESS AND CONNECTOR (POWER SUPPLY - TIRE PRESSURE WARNING ECU AND RECEIVER)
a.
C375025C42
1.125,0.125 1.521,0.385 0.396,0.26 1.823,0.125 2.219,0.385 0.396,0.26 0.625,1.771 1.198,1.417 true 1.229,1.167 0.74,1.177 false 0.146,0.115 0.458,0.313 0.313,0.198 10 false *a 0.469,1.823 0.927,2.021 0.458,0.198 10 false +B 1.229,0.167 1.688,0.365 0.458,0.198 10 false Z3 0.542,1.104 1,1.302 0.458,0.198 10 false IG 1.563,0.156 2.021,0.354 0.458,0.198 10 false *A 1.906,0.156 2.365,0.354 0.458,0.198 10 false Z30 2.271,0.156 2.729,0.354 0.458,0.198 10 false *B
*A Non-Integration Type
*B Integration Type
*a Front view of wire harness connector
(to Tire Pressure Warning ECU and Receiver)


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

Standard Voltage:
Non-Integration Type:
Tester Connection Condition Specified Condition
Z3-7 (+B) - Body ground Always 10 to 16 V
Z3-1 (IG) - Body ground Ignition switch ON 10 to 16 V

Integration Type:
Tester Connection Condition Specified Condition
Z30-7 (+B) - Body ground Always 10 to 16 V
Z30-1 (IG) - Body ground Ignition switch ON 10 to 16 V



Result:
Proceed to
OK
NG



OK

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

for Standard Roof:

Click hereSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING RECEIVER (for Standard Roof)>REMOVAL

for High Roof:

Click hereSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING RECEIVER (for High Roof)>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR