martes, 29 de diciembre de 2009

Ignition Timing Inspection

  1. Connect the Honda Diagnostic System (HDS) to the data link connector (DLC) (see step 2 on HOW TO USE THE HDS (HONDA DIAGNOSTIC SYSTEM) ), and check for DTCs. If a DTC is present, diagnose and repair the cause before inspecting the ignition timing.
  2. Start the engine. Hold the engine at 3,000 rpm with no load (in Neutral) until the radiator fan comes on, then let it idle.
  3. Check the idle speed (see IDLE SPEED INSPECTION ).
  4. Select "SCS" mode using the HDS.
  5. Free the service loop from the wire harness, then connect the timing light to the service loop.

    Fig. 3: Connecting Timing Light To Service Loop
    Courtesy of AMERICAN HONDA MOTOR CO., INC.

  6. Aim the light toward the pointer (A) on the cam chain case. Check the ignition timing under a no load condition (headlights, blower fan, rear window defogger, and air conditioner are turned off).

    Fig. 4: Aiming Pointer On Cam Chain Case
    Courtesy of AMERICAN HONDA MOTOR CO., INC.

  7. If the ignition timing differs from the specification, check the cam timing. If the cam timing is OK, update the engine control module (ECM)/ powertrain control module (PCM) if it does not have the latest software (see UPDATING THE ECM/PCM ), or substitute a known-good ECM/PCM (see SUBSTITUTE THE ECM/PCM ), then recheck. If the system works properly, and the ECM/PCM was substituted, replace the original ECM/PCM (see ECM/PCM REPLACEMENT ).
  8. Disconnect the HDS and the timing light.
  9. Secure the service loop to the wire harness with wire ties.

Ignition Coil Removal/Installation

  1. Remove the ignition coil cover (A), disconnect the ignition coil connectors (B), then remove the ignition coils (C).

    Fig. 5: Removing Ignition Coil Cover
    Courtesy of AMERICAN HONDA MOTOR CO., INC.

  2. Install the ignition coils in the reverse order of removal.

Ignition Coil Relay Circuit Troubleshooting

  1. Check the No. 2 (15A) fuse in the under-dash fuse/relay box.

    Is the fuse OK?

    1. YES - Go to step 2.
    2. NO - Replace the fuse.
  2. Remove the ignition coil relay from the under-dash fuse/relay box, and test it (see POWER RELAY TEST ).

    Is the relay OK?

    1. YES - Go to step 3.

jueves, 3 de diciembre de 2009

Recuperacion codigos OBDII

CODIGOS DE ERRORES (OBDII) PARA HONDA/ACURA ECM'S Los motores Honda con OBD2 tienen tantos sensores que puede llegar a ser muy dificil averiguar que es lo que esta andando mal.
Puenteando una ficha color celeste ubicada debajo de la guantera, cerca del ECU se puede averiguar por medio de la lectura de un codigo que arrojara la luz amarilla en el tablero "Check Engine"de error y la siguiente tabla, que es lo que no funciona.
El procedimiento es el siguiente:
- Apagar el contacto del auto.
- Buscar debajo de la guantera una ficha color celeste con 2 ranuras planas y puentearla con un cable.
Poner el auto en contacto.
- La Luz amarilla que se encontraba prendida va a empezar a hacer una serie de destellos largos y luego una serie de destellos cortos. Contar cuantos hace de cada uno.
-Los destellos largos son las decenas y los cortos son las unidades. Ejemplo: 6 destellos largos, 7 destellos cortos significa codigo de error 67 Busco en la tabla y la falla es "baja eficiencia del catalizador o catalizador roto".