A new technical release by Autoelectro has provided a solution to a common problem with the starter motor on Fiat Doblo 1.3D Multijet (2014-onwards).

The rotating electrics specialist says that often on this model, a slow start or excessive crank time can be incorrectly diagnosed as a faulty or worn-out starter motor. However, this is not always the case as underlying issues are regularly overlooked and the same fault that was thought to be fixed reoccurs.

Autoelectro technical experts say that the vehicle’s slow starting issue is often not down to the starter motor, but is caused by the engine’s main earth wire to the chassis being corroded. The damage triggers a poor connection and can result in excessive cranking of the starter motor and, consequently, may cause it to burn out and fail.

To minimise the risk of failure, Autoelectro advises technicians to inspect the earth wire connected to the chassis and replace if necessary. The wire on the Doblo can be found close to the gearbox and runs directly from the negative terminal on the battery.

Other symptoms that can indicate a possible burnt-out starter motor include the following:

• Blue colour on the gear shaft and pinion area
• Rattling inside the starter motor
• Burning smell from starter motor or insulation leak
• Damaged pinion teeth or broken nose cone
• Burnt, discoloured or melted wire from solenoid to starter body
• Burnt label

Autoelectro point out that failure to investigate and rectify this fault can result in premature failure of the component and may invalidate the warranty.

More technical bulletins can be accessed for free at www.autoelectro.co.uk.