Troubleshooting Procedures

Checking the Diagnostic Trouble Code (DTC) 

with an OBD II Scan tool or Honda PGM Tester 

When the PCM senses an abnormality in the input or output systems, the [D₄ ] indicator light in the gauge assembly will blink. When the 16P Data Link Connector (DLC) (located under the dash on the driver's side) is connected to the OBD II Scan Tool or Honda PGM Tester as shown, the scan tool or tester will indicate the Diagnostic Trouble Code (DTC) when the ignition switch is turned ON(II).

When the [D₄ ] indicator light has been reported on, connect the OBD II Scan Tool conforming to SAE J1978 or Honda PGM Tester to the DLC (16P). Turn the ignition switch on (II), and observe the DTC on the screen of the OBD II Scan Tool or Honda PGM Tester. After determining the DTC, refer to the electrical system SYMPTOM-TO-COMPONENT CHART  on .

Checking the Diagnostic Trouble Code (DTC) 

with the Service Check Connector and Special Tool 

When the PCM senses an abnormality in the input or output systems, the [D₄ ] indicator light in the gauge assembly will blink. When the Service Check Connector (located under the dash on the passenger side) is connected with the special tool as shown, the [D₄ ] indicator light will blink the Diagnostic Trouble Code (DTC) when the ignition switch is turned on (II).

When the [D₄ ] indicator light has been reported on, connect the Service Check Connector (2P) with the special tool. Then turn on (II) the ignition switch and observe the [D₄ ] indicator light.

Codes 1 through 9 are indicated by individual short blinks. Codes 10 and above are indicated by a series of long and short blinks. One long blink equals 10 short blinks. Add the long and short blinks together to determine the code. After determining the code, refer to the electrical system SYMPTOM-TO-COMPONENT CHART  on .

1. Remove the kick panel on the passenger's side (see INTERIOR TRIM REMOVAL/INSTALLATION ).
2. Remove the PCM, and turn the PCM over.
   Fig 4: Identifying Kick Panel And PCM

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
3. Inspect the circuit on the PCM according to the troubleshooting flowchart with the special tools and a digital multimeter as shown.

   How to Use the Backprobe Set 

   Connect the backprobe adapters to the stacking patch cords, and connect the cords to a multimeter. Using the wire insulation as a guide for the contoured tip of the backprobe adapter, gently slide the tip into the connector from the wire side until it comes in contact with the terminal end of the wire.

   Fig 5: Connecting Backprobe Adapters To Stacking Patch Cords

   Courtesy of AMERICAN HONDA MOTOR CO., INC.

• PCM Reset Procedure 

1. Turn the ignition switch off.
2. Remove the BACK UP fuse (7.5 A) from the under-hood fuse/relay box for 10 seconds to reset the PCM.
   NOTE:

   • Disconnecting the BACK UP fuse also cancels the radio preset stations and clock setting. Make note of the radio presets before removing the fuse so you can reset them.
   • The PCM memory cannot be cleared by using the OBD II Scan Tool or Honda PGM Tester; be sure to remove the BACK UP fuse to reset the PCM.
     Fig 6: Identifying Under-Hood Fuse/Relay Box And Back Up Fuse

     Courtesy of AMERICAN HONDA MOTOR CO., INC.

• Final Procedure 

1. Turn the ignition switch OFF.
2. Reset the PCM.
3. Disconnect the OBD II Scan Tool or Honda PGM Tester from the Data Link Connector (16P), or remove the special tool from the Service Check Connector (2P).
4. Turn the ignition switch ON (II), and set the radio presets and clock setting.