FI/EFI System, page 36

FL36        EFI SYSTEM — Troubleshooting for EFI Electronic Circuit with Volt/Ohmmeter

• VTA ↔ E2

① There is no specified voltage at ECU terminals VTA 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 E1 and body
ground.
                                                                                    BAD

                                                                        Repair or replace

Refer to No. 1.              BAD        Repair or replace

OK

③ Check throttle position sensor.        BAD        Repair or replace

OK

Check wiring between ECU and              BAD        Repair or replace
throttle position sensor.

OK

Try another ECU.


• VC ↔ E2

① There is no voltage between ECU terminals VC 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 throttle position                        Refer to No. 1.
sensor.

BAD                    OK

Repair or replace        Check wiring between ECU and
                        throttle position sensor.

                        OK                        BAD

Try another ECU.                        Repair or replace
                                        wiring.