Inspection Procedure

HINT:

Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

1. Check operation of speedometer. 

   CHECK: 

   Drive the vehicle and check if operation of the speedometer in the combination meter is normal.

   HINT:

   The vehicle speed sensor is operating normally if the speedometer display is normal.

   1. NG: Check speedometer circuit. 
   2. OK: Go To Next Step 
2. Check for short in wire harness between terminal SPD of ECM connector and body ground. 

   PREPARATION: 

   1. Remove the glove compartment (see ENGINE CONTROL MODULE (ECM) ).
   2. Disconnect the E7 connector from the ECM.

   CHECK: 

   Check the resistance between terminal SPD of the ECM connector and body ground.

   OK: 

   Resistance: 10 kΩ or higher 

   Fig 1: Disconnecting E7 Connector From ECM

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: Repair of replace harness and connector. 
   2. OK: Go To Next Step 
3. Check voltage between terminal SPD of ECM connector and body ground. 

   PREPARATION: 

   1. Remove the glove compartment (see ENGINE CONTROL MODULE (ECM) ).
   2. Shift the shift lever to neutral.
   3. Jack up the vehicle.
   4. Turn the ignition switch ON.

   CHECK: 

   Measure the voltage between terminal SPD of the ECM connector and the body ground when the wheel is turned slowly.

   Fig 2: Identifying Terminal SPD Of ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: 

   Voltage is generated intermittently. 

   HINT:

   The output voltage should fluctuate up and down similarly to the diagram on the left when the wheel is turned slowly.

   Fig 3: ECM Connector Terminal Voltage Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: Check and repair harness and connector between combination meter and ECM. 
   2. OK: Replace ECM (see  ENGINE CONTROL MODULE (ECM)  ).