TSRM/MK3 Supra/Repair Manual
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FI/EFI System — Diagnostic Codes, page 26

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Diagnostic Codes — MK3 Supra EFI System, page 26
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Page text (OCR transcript)
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