EFI SYSTEM — Diagnosis System FI-25 Code No. | Light Pattern | Code No. | Light Pattern ---------|----------------------------------|----------|---------------------------------- — | ON/OFF [pattern shown] | 31 | [pattern shown] 11 | [pattern shown] | 32 | [pattern shown] 12 | [pattern shown] | 41 | [pattern shown] 13 | [pattern shown] | 42 | [pattern shown] 14 | [pattern shown] | 43 | [pattern shown] 21 | [pattern shown] | 51 | [pattern shown] 22 | [pattern shown] | 52 | [pattern shown] 23 | [pattern shown] | 53 | [pattern shown] DIAGNOSTIC CODES Code No. | System | Diagnosis | Trouble Area | See page ---------|------------------|------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------|---------- — | Normal | This appears when none of the other codes (11 thru 51) are identified. | | 11 | ECU (+ B) | Wire severance, however slight, in + B (ECU). | 1. Main relay circuit 2. Main relay | FI-32 12 | RPM Signal | No Ne, G signal to ECU within several seconds after engine is cranked. | 1. Distributor circuit 2. Distributor 3. Starter signal circuit 4. ECU | IG-7 13 | RPM Signal | No Ne signal to ECU within several seconds after engine reaches 1,000 rpm. | Same as 12, above. | 14 | Ignition Signal | No signal from igniter six times in succession | 1. Igniter circuit (+B, IG₁, IG₂) 2. Igniter 3. ECU | FI-42 21 | Oxygen Sensor Signal | Oxygen sensor gives a lean signal for several seconds even when coolant temperature is above 50°C or gives a rich signal continuously under high load conditions above 1,500 rpm. | 1. Oxygen sensor circuit 2. Oxygen sensor 3. ECU | FI-73