How to Check for Diagnostic Trouble Codes (DTCs)
When the AWD control unit senses an abnormality in the input or output systems, the AWD system indicator in the gauge control module will usually come on, and the MIL, the A/T gear position indicator, the VSA indicator, and/or the ABS indicator may also come on.
NOTE: Check the vehicle battery condition and charging system before troubleshooting.
1. Turn the vehicle to the OFF (LOCK) mode, then connect the Honda Diagnostic System (HDS) to the DLC
located under the driver's side of the dashboard.
2. Turn the vehicle to the ON mode. Make sure the HDS communicates with the vehicle and the AWD control unit. If it does not communicate, go to the AWD system symptom troubleshooting for HDS does not communicate
See the HDS help menu for specific instructions.
3. If there are PGM-FI system DTCs and other system DTCs at the same time, troubleshoot the PGM-FI system DTCs first, otherwise the AWD DTC may return.
4. After recording the DTCs, clear all DTCs.
5. Test-drive the vehicle for several minutes in AWD mode, and check for DTCs. If the DTC returns, refer to the DTC troubleshooting. If the DTC does not return, there was an intermittent problem within the circuit. Make sure all connectors and terminals in the circuit are tight.
Follow the prompts on the HDS to display the DTC(s) on the screen. Check the DTC and the freeze data for all systems. After determining the DTC(s), refer to the DTC troubleshooting.