FI/EFI System, page 42

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

No. | Terminals | Trouble | Condition | STD Voltage
7 | IGt - E₁ | No voltage | Cranking or idling | 0.7 - 1.0V

Fusible Link

Fusible Link    Fuse
           IG/SW
Fusible Link

Battery

Igniter w/
Ignition Coil

Tachometer

ECU
IGt
IG₁
IG S/W
E₁

F.02/60

① There is no voltage between ECU terminal IGt and E₁.
   (Idling)

Voltmeter           ECU
          IGt  E₁
   V

F.02/61

② Check that there is voltage between ECU terminal IG S/W and
   body ground. (Idling)

Voltmeter           ECU
                IG S/W
   V

F.02/46

OK

Check wiring between ECU terminal E₁ and
body ground.

                                BAD → Repair or replace

Refer to No. 1.

OK                              BAD → Repair or replace

Check fuse and wiring harness.

OK

Check wiring between ECU and
distributor.                    BAD → Repair or replace

OK

Check distributor.              BAD → Replace

OK

Check wiring between ECU and
igniter.                        BAD → Repair or replace

OK

Check igniter.                  BAD → Repair or replace

OK

Try another ECU.