TSRM/MK3 Supra/Repair Manual
Repair ManualWiring Diagrams
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FI/EFI System109 / 126
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EFI Main Relay — MK3 Supra EFI System, page 109
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EFI Main Relay ECU Fusible Link Fuse EFI Main Relay +B AMZ 30A EFI 15A BAT M-REL Fusible Link MAIN 2.0L Battery F10466 INSPECTION OF EFI MAIN RELAY 1. CHECK OPERATION OF MAIN RELAY Turn the ignition switch ON. At this time an operation noise will occur from the relay. EFI Main Relay F10463 2. INSPECT RELAY CONTINUITY (a) Using an ohmmeter, check that there is continuity between terminals 1 and 3. (b) Check that there is no continuity between terminals 2 and 4. If continuity is not as specified, replace the relay. No continuity Continuity 1 3 1 3 2 4 2 4 B16030 3. INSPECT RELAY OPERATION (a) Apply battery voltage across terminals 1 and 3. (b) Check that there is continuity between terminals 2 and 4. If operation is not as specified, replace the relay. Continuity Battery B16031