1991 Honda CRX

  • 1991 HONDA CRX

1991 Honda CRX Manual

how do you do that ECU light testing thing? =/

Do you
have the same problem?
Sunday, February 15th, 2009 AT 3:12 PM

1 Reply


Your talking about retreiving codes?

Remove the ecu mounting bracket on the passenger side floor board/base of fire wall behind the carpet. Look at the triangle window on the ecu and there should be an led inside. Turn the car to Ignition 2 and the led will blink accordingly. Long blinks equal 10 and short blinks equal 1.

Example: 2 long flashes and 3 short would be knock sensor.

Here is a code chart to referance:

Diagnostic Trouble Code (DTC) System Indicated
0 Engine Control Module (ECM)
1 Heated Oxygen Sensor (HO2S)
3 Manifold Absolute Pressure (MAP Sensor)
4 Crankshaft Position (CKP Sensor)
6 Engine Coolant Temperature (ECT Sensor)
7 Throttle Position (TP Sensor)
8 Top Dead Center Position (TDC Sensor)
9 No. 1 Cylinder Position (CYP Sensor)
10 Intake Air Temperature (IAT Sensor)
13 Barometric Pressure (BARO Sensor)
14 Idle Air Control (IAC Valve)
15 Ignition Output Signal
16 Fuel Injector
17 Vehicle Speed Sensor (VSS)
20 Electrical Load Detector (ELD)
21 Variable Valve Timing & Valve Lift Electronic Control Solenoid Valve (VTEC Solenoid Valve)
22 Variable Valve Timing & Valve Lift Electronic Control Pressure Switch (VTEC Pressure Switch)
23 Knock Sensor (KS)
30 A/T FI Signal A
31 A/T FI Signal B
41 Heated Oxygen Sensor (HO2S) Heater
43 Fuel Supply System

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Monday, February 16th, 2009 AT 7:34 PM

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