Component Tests and General Diagnostics

Component and signal testing

Testing is started at point 1 and runs through all the points up to point 7, see table. Connections are the same as for "Fault diagnosis - stored faults".

Note: In this testing mode, the switch must be set to "ON" before the ignition is switched on.




1 Set the switch to "ON".

2 Switch on the ignition and wait for a short flash of the CHECK ENGINE lamp, then immediately set the switch to "OFF".

At the same moment the lamp starts flashing, the fuel pump should start running (unless it is defective). Listen for the sound of the pump or, if necessary, check the fuel pressure.

Note: The fuel pump will run for less than a second. No ID code will be obtained during this test.




3 To move on to test No.2 (injectors), set the switch to "ON".

4 After a short flash, set the switch to "OFF".




A code will now be displayed in the same way as for "Fault diagnosis - stored faults", i.e. first a long flash to indicate the start of the code, then a series of short flashes comprising the actual fault code, and finally another long flash to indicate the end of the code.

Check by listening for the sound of the injectors working.

5 Run through the remaining points in the table in the same way. Set the switch to "ON", - wait for a short flash - and then set the switch to "OFF".

Table for component and signal testing: