Last Modified: 4-30-2014 6.6 C Doc ID: RM0000018LB001X
Model Year: 2006 Model: LX470 Prod Date Range: [05/2005 -           ]
Title: TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: C2171/71,C2172/72; Transmitter ID not Registered in Main Mode; 2006 MY LX470 [05/2005 -        ]

DTC

C2171/71

Transmitter ID not Registered in Main Mode

DTC

C2172/72

Transmitter ID not Registered in 2nd Mode

DESCRIPTION

DTC No.

DTC Detecting Condition

Trouble Area

C2171/71

C2172/72

Transmitter ID code is not registered. (When an ID code is unregistered for 51 minutes or more.)
  • Tire pressure monitor ECU
  • Tire pressure antenna
  • tire pressure warning select switch
  • Wire harness

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

It is necessary to register an ID code after replacing the tire pressure monitor valve sub-assembly and/or the tire pressure monitor ECU 2006 MY LX470 [05/2005 -        ]; TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: REGISTRATION .

HINT:

Set the tire pressure to the specified value.

PROCEDURE

1.

CHECK TIRE PRESSURE WARNING LIGHT*1

(a) Check the tire pressure warning light.

Result

Condition

Proceed to

Does not blink

A

Comes on and goes off repeatedly at 0.5 second intervals

B
B

GO TO STEP 4

A

2.

CLEAR DTC

(a) Clear the DTC 2006 MY LX470 [05/2005 -        ]; TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: DTC CHECK / CLEAR .

NEXT

3.

CHECK DTC

(a) Check for DTC 2006 MY LX470 [05/2005 -        ]; TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: DTC CHECK / CLEAR .

OK:

DTC is not output.

NG

REPLACE TIRE PRESSURE MONITOR ECU

OK

END (Perform procedures to check if the transmitter ID is registered)

4.

CHECK DTC

(a) Check for DTC 2006 MY LX470 [05/2005 -        ]; TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: DTC CHECK / CLEAR .

Result

Result

Proceed to

C2171/71 output

A

C2172/72 output

B
NG

GO TO STEP 12

A

5.

CHECK TIRE PRESSURE WARNING SELECT SWITCH (MAIN POSITION)

OK:

Tire pressure warning select switch is set to "MAIN".

HINT:

If the tire pressure warning select switch is not set to "MAIN", set the tire pressure warning select switch to "MAIN" and go to step *1.
NG

GO TO STEP 1

OK

6.

CHECK TEST MODE DTC

(a) Check for test mode DTC 2006 MY LX470 [05/2005 -        ]; TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: TEST MODE PROCEDURE .

Result

Result

Proceed to

C2195/95 output

A

C2195/95 not output

B
B

GO TO STEP 10

A

7.

CHECK WIRE HARNESS (ANTENNA - ECU)

(a) Disconnect the T36 ECU connector.

(b) Disconnect the T40 and T41 antenna connectors.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:

Tester Connection

Specified Condition

T36-3 (ANTL) - T40-1

Below 1 Ω

T36-2 (ANTR) - T41-1

Below 1 Ω
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

8.

REPLACE OUTER MIRROR RETRACTOR (TIRE PRESSURE ANTENNA)
NEXT

9.

CHECK DTC

(a) Check for DTC 2006 MY LX470 [05/2005 -        ]; TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: DTC CHECK / CLEAR .

OK:

DTC is not output.

OK

END

NG

REPLACE TIRE PRESSURE MONITOR ECU

10.

CHECK WIRE HARNESS (ECU - SELECT SWITCH)

(a) Disconnect the T35 ECU connector.

(b) Disconnect the T38 switch connector.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:

Tester Connection

Specified Condition

T35-7 (IDSW) - T38-2

Below 1 Ω

T35-7 (IDSW) - Body ground

10 k Ω or higher

T38-1 - Body ground

Below 1 Ω
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

11.

INSPECT TIRE PRESSURE WARNING SELECT SWITCH

(a) Remove the tire pressure warning select switch.

(b) Measure the resistance of the switch.

Standard resistance:

Tester Connection

Switch Position

Specified Condition

1 - 2

MAIN

10 k Ω or higher

1 - 2

2nd

Below 1 Ω
NG

REPLACE TIRE PRESSURE WARNING SELECT SWITCH

OK

REPLACE TIRE PRESSURE MONITOR ECU

12.

CHECK TIRE PRESSURE WARNING SELECT SWITCH (2ND POSITION)

OK:

tire pressure warning select switch is set to "2nd".

HINT:

If the tire pressure warning select switch is not set to "2nd", set the tire pressure warning select switch to "2nd" and go to step *1.
NG

GO TO STEP 1

OK

13.

CHECK TEST MODE DTC

(a) Check for test mode DTC 2006 MY LX470 [05/2005 -        ]; TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: TEST MODE PROCEDURE .

Result:

Result

Proceed to

C2195/95 output

A

C2195/95 not output

B
B

GO TO STEP 17

A

14.

CHECK WIRE HARNESS (ANTENNA - ECU)

(a) Disconnect the T36 ECU connector.

(b) Disconnect the T40 and T41 antenna connectors.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:

Tester Connection

Specified Condition

T36-3 (ANTL) - T40-1

Below 1 Ω

T36-2 (ANTR) - T41-1

Below 1 Ω
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

15.

REPLACE OUTER MIRROR RETRACTOR (TIRE PRESSURE ANTENNA)
NEXT

16.

CHECK DTC

(a) Check for DTCs 2006 MY LX470 [05/2005 -        ]; TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: DTC CHECK / CLEAR .

OK:

DTC is not output.

OK

END

NG

REPLACE TIRE PRESSURE MONITOR ECU

17.

CHECK WIRE HARNESS (ECU - SELECT SWITCH)

(a) Disconnect the T35 ECU connector.

(b) Disconnect the T38 switch connector.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:

Tester Connection

Specified Condition

T35-7 (IDSW) -T38-2

Below 1 Ω

T35-7 (IDS) - Body ground

10 kΩ or higher

T38-1 - Body ground

Below 1 Ω
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

18.

INSPECT TIRE PRESSURE WARNING SELECT SWITCH

(a) Remove the select switch.

(b) Measure the resistance of the switch.

Standard resistance:

Tester Connection

Switch Position

Specified Condition

1 - 2

MAIN

10 kΩ or higher

1 - 2

2nd

Below 1 Ω
NG

REPLACE TIRE PRESSURE WARNING SELECT SWITCH

OK

REPLACE TIRE PRESSURE MONITOR ECU