TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: C2171/71,C2172/72; Transmitter ID not Registered in Main Mode; 2007 MY LX470 [08/2006

Last Modified: 7-3-2017	6.8:8.0.40	Doc ID: RM000002KJB009X
Model Year Start: 2007	Model: LX470	Prod Date Range: [08/2006 - ]
Title: TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: C2171/71,C2172/72; Transmitter ID not Registered in Main Mode; 2007 MY LX470 [08/2006 - ]

DTC

C2171/71

Transmitter ID not Registered in Main Mode

DTC

C2172/72

Transmitter ID not Registered in 2nd Mode

DESCRIPTION

The IDs of each tire pressure warning valve and transmitter are registered to the tire pressure warning ECU and receiver. When the ECU detects that an ID is not one of the registered IDs, or cannot receive an ID signal, a DTC is output.

DTC Code

Detection 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 warning ECU and receiver

INSPECTION PROCEDURE

NOTICE:

When replacing the tire pressure warning ECU and receiver, read the IDs stored in the old ECU using the intelligent tester and note them down before removal.
It is necessary to perform initialization after registration of the transmitter IDs into the tire pressure warning ECU and receiver after the ECU and/or valve and transmitter has been replaced.

PROCEDURE

1.	CONFIRM REGISTRATION CONDITION (REGISTERED ID CODES)

(a) Turn the ignition switch OFF.

(b) Connect the intelligent tester to the DLC3.

(d) Following the display on the intelligent tester, select the "DATA LIST".

(e) Check the values by referring to the table below.

Tire pressure warning ECU and receiver

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
REGIT ID1 CODE	Registered ID1 code/ min.: 0 max.: FFFFFFF*	The ID No. registered in the transmitter ID1 is displayed	*: Displayed only when the ID No. is not registered.
REGIT ID2 CODE	Registered ID2 code/ min.: 0 max.: FFFFFFF*	The ID No. registered in the transmitter ID2 is displayed	*: Displayed only when the ID No. is not registered.
REGIT ID3 CODE	Registered ID3 code/ min.: 0 max.: FFFFFFF*	The ID No. registered in the transmitter ID3 is displayed	*: Displayed only when the ID No. is not registered.
REGIT ID4 CODE	Registered ID4 code/ min.: 0 max.: FFFFFFF*	The ID No. registered in the transmitter ID4 is displayed	*: Displayed only when the ID No. is not registered.
REGIT ID5 CODE	Registered ID5 code/ min.: 0 max.: FFFFFFF*	The ID No. registered in the transmitter ID5 is displayed	*: Displayed only when the ID No. is not registered.

OK:

The registered transmitter ID codes are displayed on the intelligent tester.

GO TO STEP 4

2.	PERFORM REGISTRATION

(a) Register the transmitter IDs for all the wheels .

3.	PERFORM INITIALIZATION

(a) Perform initialization .

4.	READ VALUE USING DATA LIST (TIRE INFLATION PRESSURE)

(a) Turn the ignition switch OFF.

(b) Connect the intelligent tester to the DLC3.

(d) Following the display on the intelligent tester, select the "DATA LIST".

(e) Check the values by referring to the table below.

Tire pressure warning ECU and receiver

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
TIREPRESS1	ID1 tire inflation pressure / min.: Absolute pressure / 0 kPa (0 kgf/cm ² , 0 psi), Relative pressure / -100 kPa (-1 kgf/cm ² , -14 psi) max.: Absolute pressure / 637.5 kPa (6.5 kgf/cm ² , 92.5 psi), Relative pressure / 537.5 kPa (5.4 kgf/cm ² , 78 psi)	Actual tire inflation pressure	If 0 kPa (0 kgf/cm ² , 0 psi) is displayed for absolute pressure or -100 kPa (-1 kgf/cm ² , -14 psi) is displayed for relative pressure, data has not been received.*
TIREPRESS2	ID2 tire inflation pressure / min.: Absolute pressure / 0 kPa (0 kgf/cm ² , 0 psi), Relative pressure / -100 kPa (-1 kgf/cm ² , -14 psi) max.: Absolute pressure / 637.5 kPa (6.5 kgf/cm ² , 92.5 psi), Relative pressure / 537.5 kPa (5.4 kgf/cm ² , 78 psi)	Actual tire inflation pressure	If 0 kPa (0 kgf/cm ² , 0 psi) is displayed for absolute pressure or -100 kPa (-1 kgf/cm ² , -14 psi) is displayed for relative pressure, data has not been received.*
TIREPRESS3	ID3 tire inflation pressure / min.: Absolute pressure / 0 kPa (0 kgf/cm ² , 0 psi), Relative pressure / -100 kPa (-1 kgf/cm ² , -14 psi) max.: Absolute pressure / 637.5 kPa (6.5 kgf/cm ² , 92.5 psi), Relative pressure / 537.5 kPa (5.4 kgf/cm ² , 78 psi)	Actual tire inflation pressure	If 0 kPa (0 kgf/cm ² , 0 psi) is displayed for absolute pressure or -100 kPa (-1 kgf/cm ² , -14 psi) is displayed for relative pressure, data has not been received.*
TIREPRESS4	ID4 tire inflation pressure / min.: Absolute pressure / 0 kPa (0 kgf/cm ² , 0 psi), Relative pressure / -100 kPa (-1 kgf/cm ² , -14 psi) max.: Absolute pressure / 637.5 kPa (6.5 kgf/cm ² , 92.5 psi), Relative pressure / 537.5 kPa (5.4 kgf/cm ² , 78 psi)	Actual tire inflation pressure	If 0 kPa (0 kgf/cm ² , 0 psi) is displayed for absolute pressure or -100 kPa (-1 kgf/cm ² , -14 psi) is displayed for relative pressure, data has not been received.*
TIREPRESS5	ID5 tire inflation pressure / min.: Absolute pressure / 0 kPa (0 kgf/cm ² , 0 psi), Relative pressure / -100 kPa (-1 kgf/cm ² , -14 psi) max.: Absolute pressure / 637.5 kPa (6.5 kgf/cm ² , 92.5 psi), Relative pressure / 537.5 kPa (5.4 kgf/cm ² , 78 psi)	Actual tire inflation pressure	If 0 kPa (0 kgf/cm ² , 0 psi) is displayed for absolute pressure or -100 kPa (-1 kgf/cm ² , -14 psi) is displayed for relative pressure, data has not been received.*

HINT:

*: It may take about 2 or 3 minutes until the values are displayed.

Condition	Proceed to
All tire pressure readings are equal to specified values.	A
Tire pressure values are not displayed.	B

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

END