FI/EFI System, page 38

FI-38     EFI SYSTEM — Troubleshooting for EFI Electronic Circuit with Volt/Ohmmeter

Vs ** E2

① There is no specified voltage at ECU terminals Vs and E2.
   (IG S/W ON)

② Check that there is voltage between ECU terminal +B and body
   ground. (IG S/W ON)
   NO          OK
               Check wiring between ECU terminal E2 and body
               ground.
                              BAD
                              Repair or replace

   Refer to No. 1.        BAD     Repair or replace
                OK

③ Check air flow meter.
                              BAD     Repair or replace
                OK

   Check wiring between ECU
   and air flow meter.
                              BAD     Repair or replace
                OK

   Try another ECU.

THA ~ E2

① There is no voltage between ECU terminals THA and E2.
   (IG S/W ON)

   Check that there is voltage between ECU terminal +B and body
   ground. (IG S/W ON)
                OK                   NO

② Check air temp.
   sensor.                           Refer to No. 1.

   BAD          OK

   Replace air temp.     Check wiring between ECU and
   sensor.               air temp. sensor.

                         OK          BAD

                         Try another ECU.     Repair or replace
                                              wiring.