Initial Inspection and Diagnostic Overview

Checking the Diagnostic Trouble Code (DTC) with an OBD II Scan Tool or the 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 behind the ashtray) 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.




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, 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.

NOTE: See the OBD II Scan Tool or Honda PGM Tester user's manual for specific instructions.








Checking the Diagnostic Trouble Code (DTC) with the Service Check Connector and Special Tool
When the TCM 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. When the D4 indicator light has been reported on, connect the Service Check Connector (2P) to the special tool. Then turn ON 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.
SRS components are located in this area. Review the SRS component locations, precautions, and procedures before performing repairs or service.
1. Remove the right door sill molding.
2. Pull the carpet back to expose the ECM or PCM cover.
3. Remove the ECM or PCM cover mounting nuts, then turn the TCM or PCM over.
4. Inspect the circuit on the TCM or 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 codes, 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.




TCM/PCM Reset Procedure
1. Make sure you have the anti-theft code for the radio, then write down the frequencies for the radio's preset buttons
2. Turn the ignition switch OFF.
3. Remove the BACK UP (RADIO) fuse (7.5 A) from the under-hood fuse/relay box for 10 seconds to reset the TCM or PCM.

NOTE: The A/T control system memory can also be cleared by using the OBD II Scan Tool or the Honda PGM Tester.

Final Procedure

NOTE: This procedure must be done after any troubleshooting.

1. Turn the ignition switch OFF.
2. 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).
3. Reset the TCM or PCM.
4. Turn the ignition switch ON.
5. Enter the anti-theft code for the radio, then enter the customer's radio station presets.