2005 2.8 Crd gremlins

[Johan Nieuwenhuizen]

Hi,

I have a 2005 2.8 CRD Liberty/Cherokee A/T sport.

Washed the engine and water got into ECU. Burned and was not repairable. Had it cloned(exact copy of software) and replaced the unit.

Car now has the following issues

1. Diesel incectors plugged in, when turning ignition it makes 3 short clicks. No crank and no start. Also do not get any error codes, used cheap obd reader and shop one but get no codes.

2. Unplug injectors, crank but no start. Get U0002 and P0513 code. Immobilizer light on cluster is on. (with injectors in and out)

I have stripped the car to pieces and have not found any visable shorts, but the white/orange wire, all over the wiring loom, does have continuity to ground.

Any suggestions?

 

[Ian Glass]

Hi

I have a 2005 2.8 CRD Liberty/Cherokee A/T sport.

Washed the engine and water got into ECU. Burned and was not repairable. Had it cloned(exact copy of software) and replaced the unit.

Car now has the following issues

1. Diesel incectors plugged in, when turning ignition it makes 3 short clicks. No crank and no start. Also do not get any error codes, used cheap obd reader and shop one but get no codes.

2. Unplug injectors, crank but no start. Get U0002 and P0513 code. Immobilizer light on cluster is on. (with injectors in and out)

I have stripped the car to pieces and have not found any visable shorts, but the white/orange wire, all over the wiring loom, does have continuity to ground.

Any suggestions?

Hi Johan, first thing to check is to test FQS(Fuel Quantity Solenoid) on the back of the CP3 (HP diesel pump) and check that it is getting power when the ignition is switched on. If this solenoid isn't energised no fuel gets to the injectors. That would be a good place to start. Also check that there is power getting to the injectors. You could also hook up a pressure gauge to the fuel rail(T it with Pressure Sensor in the middle of the Rail) and see if the CP3 pump is producing any pressure when you crank the motor - connect leads direct to the starter motor. Also check that the immobilizer isn't stopping you from cranking the motor and that the security system is matched to the key(SKIM code)! This would give you a no crank/no start situation. Good luck!