Engine Diagnostics

HARD STARTING
1. Starting Motor Does Not Turn Over
Troubleshooting Procedure
Turn on headlights and starter switch.





2. Ignition Trouble - Starting Motor Turns Over But Engine Does Not Start
Spark Test:
- Disconnect an ignition coil from any spark plug.
- Connect the spark plug tester J-26792, start the engine and check if a spark is Generated in the spark plug tester.
- Before starting the engine, make sure that the spark plug tester is properly grounded.
- To avoid electrical shock, do not touch the part where insulation of the ignition coil is broken while the engine is running.





3. Trouble In Fuel System





4. Engine Lacks Compression



Engine Compression Test Procedure
1. Start and run the engine until the engine reaches normal operating temperature.
2. Turn the engine off.
3. Remove all the spark plugs.
4. Remove ignition coil fuse (15A) and disable the ignition system.
5. Remove the fuel pump relay from the relay and fuse box.
6. Engage the starter and check that the cranking speed is approximately 300 rpm.
7. Install cylinder compression gauge into spark plug hole.
8. With the throttle valve opened fully, keep the starter engaged until the compression gage needle reaches the maximum level. Note the reading.
9. Repeat the test with each cylinder.
If the compression pressure obtained falls below the limit, engine overhaul is necessary.

Limit; 1000 kPa (145 psi)