Turn ignition switch OFF.
Connect a scan tool to Data Link Connector (DLC).
Turn ignition switch ON.
Select "ENGINE (DIESEL)".
Select "ENGINE TEST FUNCTION".
Select "COMPRESSION TEST".
Perform the test in accordance with the message.
If a cylinder's engine speed is higher than the other cylinders, the cylinder's compression pressure is low.
Turn ignition switch OFF.
Connect a scan tool to Data Link Connector (DLC).
Turn ignition switch ON.
Select "ENGINE (DIESEL)".
Select "ENGINE TEST FUNCTION".
Select "IDLE SPEED COMPARISON".
Perform the test in accordance with the message.
The injector in cylinder with significantly high (low) idle speed injects more (less) quantity than the other injectors.
Turn ignition switch OFF.
Connect a scan tool to Data Link Connector (DLC).
Turn ignition switch ON.
Select "ENGINE (DIESEL)".
Select "ENGINE TEST FUNCTION".
Select "INJECTION QUANTITY COMPARISON".
Perform the test in accordance with the message.
* (+) correction value: Injection quantity is less than the others.
* (-) correction value: Injection quantity is more than the others.
* Very high correction value: The injector may have any fault. At this time, replace the injector with a new one and perform these tests again.