Symptom Related Diagnostic Procedures

Listed below are symptoms and probable causes for problems that DO NOT cause the Malfunction indicator Lamp (MIL) to come on. If the MIL was reported on, refer to How to Read Diagnostic Trouble Codes. Reading Diagnostic Trouble Codes

Troubleshoot each probable cause in the order listed (from left to right) until the symptom is eliminated.

The probable cause and troubleshooting reference can be found below.

Other Probable Causes for an engine will not start:
- Compression
- Intake air leakage
- Engine locked up
- Timing belt
- Starting system
- Overheating
- Battery




Probable Cause List








ECM/PCM Data
By connecting the OBD-II scan tool or the Honda PGM Tester to the 16P data link connector (DLC), various data can be retrieved from the ECM/PCM. The items listed in the image conform to the SAE recommended practice.

The Honda PGM Tester also reads data beyond that recommended by SAE.

Understanding this data will help to find the causes of intermittent failures or engine problems.

NOTE:
- The "operating values" given in the above images are approximate values and may be different depending on the environment and the individual car.
- Unless noted otherwise, "at idle speed" means idling with the engine completely warmed up, A/T in position [P] or [N], M/T in neutral, and the A/C and all accessories turned off.