Inspection Procedure

NOTE: Read freeze frame data using hand-held tester or OBD II scan tool, as freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction.

Connect hand-held tester, and read value of input shaft revolution sensor data.
PREPARATION:
1. Connect the hand-held tester to the DLC3.
2. Turn the ignition switch ON and push the hand-held tester main switch ON.
3. Drive the vehicle in 1st gear.
CHECK:

Read the input shaft revolution sensor data.

OK:
1. Input revolution sensor data x 0.073 = (Rear right speed sensor data + Rear left speed sensor data) / 2
1. OK: Replace transmission control ECU.
2. NG: Go to next step
Check for open or short in harness and connector between transmission control ECU and input shaft revolution sensor ( PROCEDURE ).
1. NG: Repair or replace harness and connector.
2. OK: Go to next step
Check input shaft revolution sensor installation ( INPUT SENSOR ).

Fig 1: Checking Input Shaft Revolution Sensor Installation
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CHECK:

Check the input shaft revolution sensor installation.

OK: Go to next step
1. The installation bolt is tightened properly and there is no clearance between the sensor and gear box housing.
1. NG: Install properly.
2. OK: Go to next step
Recheck input shaft revolution sensor data running in 1st gear.
1. NG: Replace input shaft revolution sensor.
2. OK: Replace transmission control ECU.