Inspection Procedure
WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
It is necessary to register an ID code after replacing the tire pressure warning valve and transmitter and/or the tire pressure warning ECU (see REGISTRATION ).
- READ VALUE OF INTELLIGENT TESTER (VEHICLE SPEED)
- Check the DATA LIST for proper functioning of the vehicle speed signal.
Tire pressure warning ECU
TIRE PRESSURE WARNING ECU CHARTItem Measurement item / Range(Display) Normal Condition Diagnostic Note VEHICLE SPEED Vehicle speed reading / Min.: 0 km/h (0 mph) Max.: 255 km/h (158 mph) Actual vehicle speed Speed indicated on the combination meter OK: Indicates actual speed.
OK: REPLACE TIRE PRESSURE WARNING ECU
NG: GO TO NEXT STEP.
- Check the DATA LIST for proper functioning of the vehicle speed signal.
- CHECK WIRE HARNESS (ECU - METER)
- Disconnect the E56 ECU connector.
- Disconnect the E19 meter connector.
- Measure the resistance of the wire harness side connectors.
Standard resistance
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
RESISTANCE CHARTTester Connection Specified Condition E56-3 (SPD) - E19-39 (+S) Below 1 Ω E56-3 (SPD) - Body ground 10 kΩ or higher NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: GO TO NEXT STEP.
- CHECK TIRE PRESSURE WARNING ECU
- Measure the voltage of the connector.
Standard voltage
VOLTAGE CHARTTester Connection Condition Specified Condition E56-3 (SPD) - E56-11 (GND) While driving vehicle Pulse generation HINT:
As the vehicle speed (wheel revolution speed) increases, a cycle of the waveform narrows.
NG: GO TO METER / GAUGE SYSTEM
OK: REPLACE TIRE PRESSURE WARNING ECU
- Measure the voltage of the connector.