Inspection Procedure

HINT:

Read freeze frame data using the hand-held tester or the OBD II. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, 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 ETCS fuse of engine room NO. 1 R/B 

   PREPARATION: 

   Remove the ETCS fuse from the engine room NO. 1 R/B

   CHECK: 

   Check the continuity of the ETCS.

   Fig 1: Checking Continuity Of ETCS

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: 

   Continuity 

   1. NG: Check for short in all harness and components connected to ETCS fuse. 
   2. OK: Go to next step. 
2. Check voltage between terminal BM of ECM connector and body ground 

   PREPARATION: 

   Remove the ECM hood (See ENGINE CONTROL MODULE (ECM) ).

   CHECK: 

   Measure the voltage between terminal BM of the ECM connector and the body ground.

   Fig 2: Checking Voltage Between Terminal BM Of ECM Connector & Body Ground

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: 

   Voltage: 9 to 14 V 

   1. OK: Check for intermittent problems (See  PRE-CHECK   ). 
   2. NG: Go to next step. 
3. Check for open or short in harness or connector between battery and ETCS fuse, ETCS fuse and ECM. 
   1. NG: Repair or replace harness or connector. 
   2. OK: Check engine room NO.1 R/B.