Page text (OCR transcript)
EFI SYSTEM — Troubleshooting with Volt/Ohmmeter (7M-GTE) FI-53
• IG SW – E1
1. There is no voltage between ECU terminals IG SW and E1.
(IG SW ON)
2. Check that there is voltage between ECU terminal IG SW and
body ground. (IG SW ON)
NO OK
Check wiring between ECU terminal E1 and body
ground.
OK BAD
Try another ECU. Repair or replace.
Check fuse, fusible links and BAD
ignition switch. Repair or replace.
• M-REL – E1
1. There is no voltage between ECU terminals M-REL and E1.
(IG SW ON)
2. Check that there is voltage between ECU terminal M-REL and
body ground. (IG SW ON)
NO OK
Check wiring between ECU terminal E1 and body
ground.
OK BAD
Try another ECU. Repair or replace.
Check EFI main relay and wiring BAD
harness. Replace.
OK
Try another ECU.
