OPERATIONAL PERFORMANCE TEST / Engine Test ENGINE COMPRESSION PRESSURE Summary: 1. Measure compression pressure in the cylinders by using a measuring tool (minidiag 2) Preparation: 1. Run the engine until the coolant temperature gauge reaches the operating range. 2. Install cable (2) to minidiag 2 (1). 3. Remove cover (3) on the right side in cab. Install cable (2) to the inside connector. Then, minidiag 2 (1) is turned ON. IMPORTANT: If disconnecting the connector of injector, fuel cannot be jetted. Therefore, ECM judges that the fuel system is faulty and the fault code is displayed. After measurement, delete the displayed fault code. T4GB-04-03-005 Right Side in Cab Measurement: 1.
With the key switch OFF, operate minidiag 2 (1). (As for the procedures, refer to the next page.) 2. Select the screen for the engine copression pressure. 3. As the command that the key switch starts is dis- played on the screen, turn the key switch to the START position and run the starter. 4. Run the starter until the starter stops by itself. Evaluation: When the starter stops, the result is displayed on the screen of minidiag 2 (1). Remedy: Refer to the engine shop manual. T4GB-04-03-006 3 T4-3-4 1 2 1 2