Inspection Procedure

WARNING: This page is about a different car, the 2002 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Start the inspection from step 1 in case of using the hand-held tester and start from step 2 in case of not using the hand-held tester.

Check output value of the yaw rate sensor.
Preparation:
1. Remove the 2 bolts and yaw rate sensor with connector still connected.
2. Connect the hand-held tester to the DLC3.
3. Turn the ignition switch ON and push the hand-held tester main switch ON.
4. Select the DATALIST mode on the hand-held tester.
Check: that the yaw rate value of the yaw rate sensor displayed on the hand-held tester is changing: Place the yaw rate sensor vertically to the ground and turn the sensor pivoted on its center.

Fig 1: Testing Yaw Rate Sensor Output Value
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Yaw rate value must be changing.

OK: Go to step 3.

If NG , go to step 2.
Check whether continuity exists between terminal YD of yaw rate sensor and terminal YD of ABS & BA & TRAC & VSC ECU.
NG: Repair or replace harness or connector.

OK: Check and replace ABS & BA & TRAC & VSC ECU.
Check yaw rate sensor.
Check:
1. Turn the ignition switch ON.
2. Measure the voltage between terminals IGA (3) and GYW2 (1), YAW2 (4) and GYW2 (1) of the yaw rate sensor with connector still connected.
Fig 2: Testing Yaw Rate Sensor Voltages
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Yaw Rate Sensor Voltage Specifications
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Replace yaw rate sensor.

If OK , go to step 4.
Check for open and short circuit in harness and connector between yaw rate sensor and ABS & BA & TRAC & VSC ECU . See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE .

NG: Repair or replace harness or connector.

OK: Check and replace ABS & BA & TRAC & VSC ECU.