TSRM/MK2 Supra/Repair Manual
Repair ManualWiring Diagrams
p.031
FI/EFI System32 / 80
p.033
EFI SYSTEM — Troubleshooting for EFI Electronic Circuit with Volt/Ohmmeter — MK2 Supra EFI System, page 32
100%
FI-32 EFI SYSTEM — Troubleshooting for EFI Electronic Circuit with Volt/Ohmmeter No. | Terminals | Trouble | Condition | STD Voltage 1 | BAT — E₁ | No voltage | Ignition switch ON | 10 — 14 | +B — E₁ | No voltage | Ignition switch ON | 10 — 14 | IG S/W — E₁ | No voltage | Ignition switch ON | 10 — 14 | M-REL — E₁ | No voltage | Ignition switch ON | 10 — 14 [DIAGRAM showing circuit with AM₁, STOP Fuse, ECU, IG S/W, Main Relay No. 1, Circuit Opening Relay, Battery, Fuse, and ground connections with terminals BAT, IG S/W, +B, M-REL, and E₁] ① • BAT ↔ E₁ Voltmeter ECU [DIAGRAM 1 showing voltmeter connection to ECU terminals BAT and E₁] V F06743 ① There is no voltage between ECU terminals BAT and E₁. ② Check that there is voltage between ECU terminal BAT and body ground. NO | OK ③ Check wiring between ECU terminal E₁ and body ground. BAD Repair or replace Check fuse, fusible links and wiring harness. | NO | Repair Voltmeter ECU [DIAGRAM 2 showing voltmeter connection to ECU terminals BAT and ground] V F06744 Ohmmeter ECU [DIAGRAM 3 showing ohmmeter connection to ECU terminal E₁ and ground] Ω F06243