Inspection Procedure

HINT:

• If DTCs related to different systems that have terminal E2 as the ground terminal are output simultaneously, terminal E2 may have an open circuit.
• 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 accelerator pedal position sensor (See  THROTTLE BODY (SMT)  ). 
   1. NG : Replace accelerator pedal position sensor (See  INSPECTION  ). 
   2. OK : Go to Next Step 
2. Check voltage between terminals VPA and E2, and VPA2 and E2 of ECM connector. 

   PREPARATION: 

   1. Remove the ECM cover.
   2. Turn the ignition switch ON.

   CHECK: 

   Measure the voltage between terminals VPA and E2, and VPA2 and E2 of ECM connectors.

   OK: 

   Fig 1: Accelerator Pedal Position Voltage Table

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 2: Identifying VPA, E2 & VPA Terminals of ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. OK : Replace ECM (See  ENGINE CONTROL MODULE (ECM)  ). 
   2. NG : Go to Next Step 
3. Check for open and short in harness and connector in VC, VPA, VPA2 and E2 circuits between ECM and accelerator pedal position sensor (See  PROCEDURE  ). 
   1. NG : Repair or replace harness and connector. 
   2. OK : Replace accelerator pedal position sensor (See  REPLACEMENT  ).