Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

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

READ VALUE OF DATA LIST (VEHICLE SPEED)

Turn the ignition switch OFF.
Connect the intelligent tester to the DLC3.
Turn the ignition switch ON and the tester on.
Select the item below in the Data List, and read the value displayed on the intelligent tester.
Check that the values indicated on the tester and on the combination meter are the same.

Tire pressure warning ECU and receiver

TIRE PRESSURE SPECIFICATIONS

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
VEHICLE SPEED	Vehicle speed/ min.: 0 km/h (0 mph) max.: 255 km/h (158 mph)	Almost same as actual vehicle speed	Speed indicated on combination meter

OK: Vehicle speed indicated on the intelligent tester indicates the actual speed.

OK: CHECK INTERMITTENT PROBLEMS

NG: GO TO next step.

CHECK HARNESS AND CONNECTOR (ECU - COMBINATION METER)

Disconnect the T25 ECU connector.
Disconnect the C15 meter connector.

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

Standard resistance

STANDARD RESISTANCE REFERENCE CHART

Tester Connection	Condition	Specified Condition
T25-3 (SPD) - C15-16	Always	Below 1 Ω
T25-3 (SPD) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 1: Identifying C15 Meter Connector And T25 ECU Connector

OK: GO TO METER/GAUGE SYSTEM