Inspection Procedure

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

Check For Open And Short Circuit In Harness And Connector Between Terminal NEO Of Translate ECU And Terminal NEO Of ECM. See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE .
1. NG : Repair or replace harness and connector.
2. OK : Go to step 2.
Check Voltage Between Terminal NEO (13) Of Translate ECU And Body Ground.
Preparation : remove the translate ECU with connectors still connected.

Check :
1. Turn the ignition switch ON.
2. Measure the voltage between terminal 13 of the translate ECU and body ground under the engine conditions below.
  
  Fig 1: Locating Terminal NEO 13
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
OK: For specifications see Fig 2 and Fig 3.

Fig 2: Terminal NEO 13 Voltages Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Terminal NEO 13 Waveform
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG : Check and replace ECM.
2. OK : Check and replace translate ECU.
  If the same code is still output after the DTC is deleted, check the contact condition of each connection.