RM3660EC _53 Suspension _080780 TIRE PRESSURE MONITORING _0393955 TIRE PRESSURE WARNING SYSTEM(for Gasoline Model (for Type A)) C

TIRE PRESSURE MONITORING  TIRE PRESSURE WARNING SYSTEM(for Gasoline Model (for Type A))  B1247  Tire Pressure Monitor Receiver Communication Stop  


DESCRIPTION

The main body ECU (multiplex network body ECU) and tire pressure warning ECU and receiver communicate by direct line. If a malfunction occurs in this communication signal, B1247 is output by the main body ECU (multiplex network body ECU).

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B1247 Tire Pressure Monitor Receiver Communication Stop Communication between the tire pressure warning ECU and receiver and main body ECU (multiplex network body ECU) is interrupted for 10 seconds or more.
·

Tire pressure warning ECU and receiver

·

Wire harness or connector

·

Main body ECU (Multiplex network body ECU)


This DTC is for main body ECU (multiplex network body ECU)

WIRING DIAGRAM

C392155E10
2.583,1.01 2.896,1.208 0.313,0.198 10 false O18 2.917,1.01 3.354,1.24 0.438,0.229 10 false O124 2.615,0.802 2.927,1 0.313,0.198 10 false 4*1 2.99,0.802 3.302,1 0.313,0.198 10 false 4*2 1.271,1.104 1.698,1.302 0.427,0.198 10 false CPU 4.354,0.875 4.583,1.094 0.229,0.219 10 false 10 2.146,0.896 2.573,1.094 0.427,0.198 10 false RDA 4.677,1.021 5.104,1.219 0.427,0.198 10 false RDA 0.375,1.844 3.073,2.177 2.698,0.333 10 false Tire Pressure Warning ECU and Receiver 4.042,1.917 7.073,2.198 3.031,0.281 10 false Main Body ECU (Multiplex Network Body ECU) 4.052,1.75 4.417,1.99 0.365,0.24 10 false I84 0.656,2.333 3.688,2.615 3.031,0.281 10 false *1: w/ Smart Entry and Start System 3.26,2.333 6.417,2.635 3.156,0.302 10 false *2: w/o Smart Entry and Start System

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 (for Gasoline Model (for Type A))>INITIALIZATION after registrationSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING SYSTEM (for Gasoline Model (for Type A))>REGISTRATION of the transmitter IDs into the tire pressure warning ECU and receiver after the ECU has been replaced.

·

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

*: w/ Smart Entry and Start System




PROCEDURE

1.INSPECT TIRE PRESSURE WARNING ECU AND RECEIVER (OUTPUT WAVEFORM)
a.
C385229C38
0.802,0.219 1.24,0.479 0.438,0.26 1.75,0.208 2.167,0.5 0.417,0.292 1.042,1.792 1.365,1.146 true 0.292,0.271 0.604,0.469 0.313,0.198 10 false *a 2.875,3.396 3.188,3.594 0.313,0.198 10 false *b 0.885,0.271 1.198,0.469 0.313,0.198 10 false O18 0.927,1.823 1.406,2.063 0.479,0.24 10 false RDA 1.302,0.26 1.615,0.458 0.313,0.198 10 false *A 1.792,0.271 2.406,0.469 0.615,0.198 10 false O124 2.219,0.26 2.531,0.458 0.313,0.198 10 false *B
*A w/ Smart Entry and Start System
*B w/o Smart Entry and Start System
*a Component with harness connected
(Tire Pressure Warning ECU and Receiver)
*b GND


Using an oscilloscope, check the waveform.

NOTICE:

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


OK:
w/ Smart Entry and Start System
Tester Connection Tool Setting Range Condition Specified Condition
O18-4 (RDA) - Body ground 5 V/DIV.5 ms./DIV. Ignition switch ON Waveform generation

w/o Smart Entry and Start System
Tester Connection Tool Setting Range Condition Specified Condition
O124-4 (RDA) - 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 10.5 V or higher and 0.5 V or less) A
Waveform does not change from 10.5 V or higher B
Waveform does not change from 0.5 V or less C



A

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL


B

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

Click hereSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING RECEIVER>REMOVAL


C

2.CHECK TERMINAL VOLTAGE (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) OUTPUT)
2.CHECK TERMINAL VOLTAGE (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) OUTPUT)
a.

Disconnect the O18*1 or O124*2 tire pressure warning ECU and receiver connector.

*1: w/ Smart Entry and Start System

*2: w/o Smart Entry and Start System



b.

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

Standard Voltage:
w/ Smart Entry and Start System
Tester Connection Condition Specified Condition
O18-4 (RDA) - Body ground Ignition switch ON 10.5 V or higher

w/o Smart Entry and Start System
Tester Connection Condition Specified Condition
O124-4 (RDA) - Body ground Ignition switch ON 10.5 V or higher



Result:
Proceed to
OK
NG



OK

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

Click hereSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING RECEIVER>REMOVAL


NG

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

Turn the ignition switch off.


b.

Disconnect the I84 main body ECU (multiplex network body ECU) connector.


c.

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

Standard Resistance:
w/ Smart Entry and Start System
Tester Connection Condition Specified Condition
I84-10 (RDA) - O18-4 (RDA) Always Below 1 Ω
I84-10 (RDA) or O18-4 (RDA) - Body ground Always 10 kΩ or higher

w/o Smart Entry and Start System
Tester Connection Condition Specified Condition
I84-10 (RDA) - O124-4 (RDA) Always Below 1 Ω
I84-10 (RDA) or O124-4 (RDA) - Body ground Always 10 kΩ 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>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR