TIRE PRESSURE MONITORING TIRE PRESSURE WARNING SYSTEM 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

Non-Integration Type:

4.083,1.958 7.052,2.188 2.969,0.229 10 false Main Body ECU (Multiplex Network Body ECU) 4.073,1.771 4.531,1.969 0.458,0.198 10 false N20 0.385,1.771 0.844,1.969 0.458,0.198 10 false Z3 0.385,1.969 3.354,2.198 2.969,0.229 10 false Tire Pressure Warning ECU and Receiver 4.656,1.031 5.115,1.229 0.458,0.198 10 false RDA 4.385,0.917 4.635,1.115 0.25,0.198 10 false 10 2.573,0.917 2.823,1.115 0.25,0.198 10 false 4 2.073,0.917 2.531,1.115 0.458,0.198 10 false RDA2 1.26,1.115 1.719,1.313 0.458,0.198 10 false CPU

Integration Type:

4.083,1.958 7.052,2.188 2.969,0.229 10 false Main Body ECU (Multiplex Network Body ECU) 4.073,1.771 4.531,1.969 0.458,0.198 10 false N20 0.385,1.771 0.844,1.969 0.458,0.198 10 false Z30 0.385,1.969 3.354,2.198 2.969,0.229 10 false Tire Pressure Warning ECU and Receiver 4.656,1.031 5.115,1.229 0.458,0.198 10 false RDA 4.385,0.917 4.635,1.115 0.25,0.198 10 false 10 2.583,0.896 2.833,1.094 0.25,0.198 10 false 4 2.156,0.896 2.531,1.094 0.375,0.198 10 false RDA 1.26,1.115 1.719,1.313 0.458,0.198 10 false CPU

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>INITIALIZATION201906,999999,_53,_078885,_0382739,RM100000001IHE2, after registrationSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING SYSTEM>REGISTRATION201906,999999,_53,_078885,_0382739,RM100000001IHE1, of the transmitter IDs into the tire pressure warning ECU and receiver after the ECU has been replaced.

PROCEDURE

1.INSPECT TIRE PRESSURE WARNING ECU AND RECEIVER (OUTPUT WAVEFORM)

a.

0.948,0.219 1.385,0.479 0.438,0.26 1.729,0.219 2.167,0.479 0.438,0.26 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 0.531,1.813 1.708,2.031 1.177,0.219 10 false RDA2*A, RDA*B 1.073,0.26 1.385,0.458 0.313,0.198 10 false Z3 1.427,0.26 1.74,0.458 0.313,0.198 10 false *A 1.823,0.25 2.135,0.448 0.313,0.198 10 false Z30 2.208,0.25 2.521,0.448 0.313,0.198 10 false *B

*A	Non-Integration Type
*B	Integration Type
*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.

Standard Voltage:

Non-Integration Type:
Tester Connection	Tool Setting Range	Condition	Specified Condition
Z3-4 (RDA2) - Body ground	5 V/DIV, 5 ms./DIV.	Ignition switch ON	Waveform generation

Integration Type:
Tester Connection	Tool Setting Range	Condition	Specified Condition
Z30-4 (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)

for LHD: Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for LHD)>REMOVAL201906,202310,_57,_079061,_0383489,RM100000001IVKI,202310,999999,_57,_079061,_0383489,RM100000002EQ22,

for RHD: Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for RHD)>REMOVAL201906,202310,_57,_079061,_0383490,RM100000001IVRX,202310,999999,_57,_079061,_0383490,RM100000002EQ24,

B

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

·

for Standard Roof:

Click hereSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING RECEIVER (for Standard Roof)>REMOVAL201906,999999,_53,_078885,_0388791,RM100000001IXLV,

·

for High Roof:

Click hereSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING RECEIVER (for High Roof)>REMOVAL201902,999999,_53,_078885,_0388792,RM100000001H41L,

C

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

a.

Disconnect the tire pressure warning ECU and receiver connector.

b.

0.281,0.875 0.677,1.135 0.396,0.26 0.281,1.198 0.677,1.458 0.396,0.26 1.854,1.167 2.51,0.604 true 0.146,0.115 0.458,0.313 0.313,0.198 10 false *a 2.563,0.427 3.156,0.771 0.594,0.344 10 false RDA2*A, RDA*B 0.396,0.917 0.854,1.115 0.458,0.198 10 false Z3 0.729,0.906 1.188,1.104 0.458,0.198 10 false *A 0.365,1.24 0.823,1.438 0.458,0.198 10 false Z30 0.74,1.229 1.198,1.427 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
Z3-4 (RDA2) - Body ground	Ignition switch ON	10.5 V or higher

Integration Type:
Tester Connection	Condition	Specified Condition
Z30-4 (RDA) - Body ground	Ignition switch ON	10.5 V or higher

Result:

Proceed to
OK
NG

OK

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

·

for Standard Roof:

Click hereSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING RECEIVER (for Standard Roof)>REMOVAL201906,999999,_53,_078885,_0388791,RM100000001IXLV,

·

for High Roof:

Click hereSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING RECEIVER (for High Roof)>REMOVAL201902,999999,_53,_078885,_0388792,RM100000001H41L,

NG

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 N20 main body ECU (multiplex network body ECU) connector.

c.

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

Standard Resistance:

Non-Integration Type:
Tester Connection	Condition	Specified Condition
N20-10 (RDA) - Z3-4 (RDA2)	Always	Below 1 Ω
N20-10 (RDA) or Z3-4 (RDA2) - Body ground	Always	10 kΩ or higher

Integration Type:
Tester Connection	Condition	Specified Condition
N20-10 (RDA) - Z30-4 (RDA)	Always	Below 1 Ω
N20-10 (RDA) or Z30-4 (RDA) - Body ground	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

for LHD: Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for LHD)>REMOVAL201906,202310,_57,_079061,_0383489,RM100000001IVKI,202310,999999,_57,_079061,_0383489,RM100000002EQ22,

for RHD: Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for RHD)>REMOVAL201906,202310,_57,_079061,_0383490,RM100000001IVRX,202310,999999,_57,_079061,_0383490,RM100000002EQ24,

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR