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 abd transmitter and/or the tire pressure warning ECU (see REGISTRATION ).

HINT

Set the tire pressure to the specified value.

Standard pressure: 220 kPa (2.2 kgf/cm ² , 32 psi)

CHECK TIRE PRESSURE WARNING ECU

Measure the voltage of the connector.

Standard voltage

Fig 1: Identifying Pressure Warning ECU Terminals 5 And 4

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

VOLTAGE CHECK

Tester Connection	Switch Condition	Specified Condition
L20-5 (+5V) - L20-4 (GND)	Ignition switch ON	4.5 to 5.5 V

NG: Go to step 5

OK: GO TO NEXT STEP.

CHECK WIRE HARNESS (ECU - RECEIVER)

Disconnect the E56 ECU connector.
Disconnect the L20 receiver connector.

Measure the resistance of the wire harness side connectors.

Standard resistance

Fig 2: Checking Resistance Of ECU Receiver Wire Harness Side Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

RESISTANCE CHECK

Tester Connection	Specified Condition
E56-7 (RDA) - L20-1 (RDA)	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: GO TO NEXT STEP.

REPLACE TIRE PRESSURE WARNING ANTENNA AND RECEIVER
CHECK DTC
1. Check for DTC (see DTC CHECK / CLEAR ).
  OK: DTC is not output.
  
  HINT:
  - It is necessary to register an ID when replacing the tire pressure warning ECU (see REGISTRATION ).
  - Read ID on the DATA LIST before removing the tire pressure warning ECU. Register the ID in the new tire pressure warning ECU.
  NG: REPLACE TIRE PRESSURE WARNING ECU
  
  OK: END

CHECK WIRE HARNESS (ECU - RECEIVER)

Disconnect the E56 ECU connector.
Disconnect the L22 receiver connector.

Measure the resistance of the wire harness side connectors.

Standard resistance

Fig 3: Identifying ECU Receiver Wire Harness Side Connector Terminals

RESISTANCE CHECK CHART

Tester Connection	Specified Condition
E56-8 (GND2) - L20-4 (GND)	Below 1 Ω
E56-8 (RF5V) - L20-5 (+5V)	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: REPLACE TIRE PRESSURE WARNING ECU