Points to Note When Diagnosing Faults

Points to Note When Diagnosing Faults
It is impossible to give any general rules for the procedure to follow when diagnosing faults in each individual case. Depending on the fault symptoms and other information available, one method may be the best in some situations and another method best in others.

However, the following points may serve as guidance when diagnosing faults in the TCS system. Recalling them from time to time during the course of the work could prove to be of considerable help.

1. Do not forget to check the fuses.
2. Inspect connectors for corrosion on pins and contact surfaces, excessive play, looseness or anything else which may be the cause of poor contact or a deterioration in conductivity.
3. Before connecting a BOB into circuit, first check the voltage supply to pin 37 and make sure that pins 2, 14 and 24 are properly grounded.

Note that the main relay remains operated for a certain time after the ignition has been switched off. Refer to "Relays" at "Description and Operation". Relays