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, as well as other data from the time when a malfunction occurred.

1. Check ETCS fuse. 

   PREPARATION: 

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

   Fig 1: Identifying ETCS Fuse From Engine Room R/B No 1

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   CHECK: 

   Check the continuity of the ETCS fuse.

   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 glove compartment door (See ENGINE CONTROL MODULE (ECM) in SFI ).

   CHECK: 

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

   OK: 

   Voltage: 9 to 14 V 

   1. OK : Check for intermittent problems (See  PRE-CHECK   ). 
   2. NG : Go to next step. 
      Fig 2: Identifying Terminal +BM Of ECM Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check for open and short in harness and connector between ECM and ETCS fuse, ETCS fuse and battery (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
   1. NG : Repair or replace harness or connector. 
   2. OK : Check engine room R/B No. 1.