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Car fails to start

Read the instructions below then start the fault diagnostic procedure.

Symptom: Car fails to start

Car fails to start



Fault symptoms

Car fails to start

Conditions

The following conditions apply for this fault symptom:


• No diagnostic trouble codes in the car with the symptom description in question.

• There is petrol in the tank.

• Starter motor is in working order.


Diagnostic help

Most of the functions that can prevent the engine from being started are monitored by self-diagnosis and therefore generate a diagnostic trouble code if they develop a fault. Consequently, this fault diagnosis concerns faults that can prevent the engine from being started but are not monitored.

First check that the fuel pump is in working order and delivers pressure. Then check the ignition discharge module and spark plugs.

Diagnostic tool functions related to this fault are:


• Activation of fuel pump relay.

• Activation of ignition trigger.


See also the description of activating functions under ”Fault diagnosis, general” for more information.

Check the wiring

Jiggle the leads and in-line connectors at various points and in different directions to detect any intermittent breaks or short circuits in the wiring. Observe the multimeter, test lamp or diagnostic tool while doing this.