Diesel Component Test
The following component tests are used to detect faults which can occur on electronic components (sensors and actuators) of the engine systems.
A pre-condition for all of these tests is that fault codes are not stored in the control unit. If the engine telltale illuminates while the engine is running, the fault code must firstly be read out and the fault rectified using the TECH 1/2 checking procedure.
The technician must follow all of the instructions on the test sheets as closely as possible.
If a test procedure is repeated, depress the [REPEAT TEST] key on the TECH 31 and restart the test using the instructions listed under the "Procedure".
Once a test has been completed, restore the vehicle to its original condition (reconnect detached plugs, reinsert relays or fuses).