TSRM/MK3 Supra/Repair Manual
Repair ManualWiring Diagrams
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FI/EFI System26 / 126
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DIAGNOSTIC CODES — MK3 Supra EFI System, page 26
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DIAGNOSTIC CODES Code No. | Number of "CHECK" engine blinks | System | Diagnosis | Trouble area | See page — | ∩∩∩∩∩∩|___ | Normal | This appears when none of the other codes are identified. | — | — 12 | __∩∩__ | RPM Signal | No "NE" of "G" signal to ECU within 2 seconds after engine has been cranked. | • Distributor (cam position sensor) circuit • Distributor cam position sensor) • Starter signal circuit • ECU | IG-3 FI1606 13 | __∩∩∩∩__ | RPM Signal | No "NE" signal to ECU when engine speed is above 1,000 rpm. | • Distributor (cam position sensor) circuit • Distributor (cam position sensor) • ECU | — FI1607 14 | ∩∩∩∩∩∩ | Ignition Signal | NO "IGF" signal to ECU "A" times in succession. • 7M-GE 6~8 • 7M-GTE 3 | • Ignition and ignition coil circuit • Igniter and ignition coil • ECU | — FI1608 21 | __∩∩__ | Oxygen Sensor Signal | During air-fuel ratio feedback correction, voltage output from the oxygen sensor does not change from the rich or lean side and the rich side continuously for a certain period. | • Oxygen sensor circuit • Oxygen sensor • ECU | — ※1 FI1609 | | Oxygen Sensor Heater Signal | Open or short circuit in oxygen sensor heater signal (HT). | • Oxygen sensor heater circuit • Oxygen sensor heater • ECU | — 22 | __∩∩∩∩__ | Water Temp. Sensor Signal | Open or short circuit in water temp. sensor signal (THW). | • Water temp. sensor circuit • Water temp. sensor • ECU | — FI1610 24 | __∩∩∩∩∩∩ | Intake Air Temp. Sensor Signal | Open or short circuit in intake air temp. sensor signal (THA). | • Intake air temp. sensor circuit • Intake air temp. sensor • ECU | FI-40, 60 FI1611