LED

Fault diagnosis, LED

Fault symptom
LED does not light

Action
1 Check to see if the LED works
Connect the ISAT scan tool.
Select "ACTIVATE"..
Select "LED"
Select "ON".
The LED should light.
If the LED lights. the fault is of intermittent character, proceed to point 5.
If not, proceed to point 2.
2 Check the voltage supply to the LED
Disconnect the LED.
Connect the test lamp to the LED's 2 pin connector.
Repeat the ISAT scan tool command as in point 1.
The test lamp should light.
If the test lamp lights, change the LED.
If not, proceed to point 3.







3 Check the voltage supply to the LED
Connect the test lamp between the LED's 2 pin connector, pin 2 and a safe grounding point.
Repeat the ISAT scan tool commands as in point 1.
The test lamp should light.
If the test lamp does not light, proceed to point 4.
If the test lamp lights, remedy the ground lead between the LED's 2 pin connector, pin 1 and grounding point G8.
4 Check the cable assembly
Conduct a continuity test on the cable assembly between the LED connector, pin 2 and the control module, pin 2.
The resistance should be <1 Ohm.
If the resistance is incorrect, remedy the fault in the cable assembly.
If the resistance is correct, proceed to point 5.
5 Final test
Check to see if the fault symptom remains.
If the problem remains, proceed to "Before Changing the Electronic Control Module". Before Changing the Electronic Control Module