1992 Acura Legend Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Trouble Code Identification

TROUBLE CODE IDENTIFICATION CHART (1)

Code System Affected Probable Cause
0  ECU No Signal To ECU
1  O2 Sensor (Left) Open/Shorted Signal Circuit
2  O2 Sensor (Right) Open/Shorted Signal Circuit
3  MAP Sensor MAP Sensor Electrical Problem
4  Crank Angle Sensor No. 1 Sensor Circuit Problem
5  MAP Sensor MAP Sensor Mechanical Problem
6  Coolant Temp. Sensor (TW) Open/Shorted Signal Circuit
7 (2) Throttle Angle Sensor Open/Shorted Signal Circuit
9  No. 1 Cylinder Position Sensor Problem In CYL Sensor Circuit
10  Intake Air Temperature Sensor Open/Shorted Signal Circuit
12  EGR System No EGR Action
13  Atmospheric Pressure Sensor Open/Shorted Signal Circuit
14  Electronic Air Control Valve (EACV) EACV Circuit Problem
15  Ignition Output Signal Open/Shorted Signal Circuit
16  Fuel Injector Open/Shorted Signal Circuit
17 (2) Vehicle Speed Sensor (VSS) No VSS Signal
18  Ignition Timing Adjustment Open/Shorted Signal Circuit
23  Left Knock Sensor Open/Shorted Signal Circuit
41  Left O2 Sensor Heater Open/Shorted Signal Circuit
42  Right O2 Sensor Heater Open/Shorted Signal Circuit
43  Left Fuel Supply System Open/Shorted O2 Circuit
44  Right Fuel Supply System Open/Shorted O2 Circuit
45  Left Fuel Metering Injector Control
46  Right Fuel Metering Injector Control
53  Right Knock Sensor Open/Shorted Signal Circuit
54  Crank Angle Sensor No. 2 Sensor Circuit Problem
59  No. 2 Cylinder Position Problem In CYL Sensor Circuit
(1)
If codes other than these are indicated, repeat self-diagnosis. If code(s) reappear, substitute a known good ECU, and recheck codes. If code(s) clear, replace ECU.
(2)
If S4 on automatic transaxle indicator panel also blinks, A/T control unit may also require diagnosis.
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