Volvo

Conditions for diagnostic trouble code (DTC):
1) Unexpected electrical response

Observable symptoms
1) Power loss

Probable cause
1) Injector 4
2) EGR System
3) Fuel Quality
4) Low compression

Fuel Injector operation is controlled by the Engine Control Module (ECM). The ECM provides a common supply voltage to injectors 4,5,6 (Bank 2) and there are individual output transistor drivers inside the ECM to control each individual injector?s ground circuits. There are two solenoid circuits within the injector; a Needle Control Valve and a Spill Valve. Although they are separate circuits, the same fault code is used to identify a fault in the Needle Control Valve circuit and/or the Spill Valve circuit.

Conditions for diagnostic trouble code (DTC):
1) Resistance too high
2) Injector (INJ) activated

Observable symptoms
1) Low Power
2) Uneven operation
3) Abnormal noise
4) Engine is operating on only 3 or 5 cylinders

Probable cause
1) Injector 5
2) Wiring harness between engine control module (ECM) and injector (INJ)

Fuel Injector operation is controlled by the Engine Control Module (ECM). The ECM provides a common supply voltage to injectors 4,5,6 (Bank 2) and there are individual output transistor drivers inside the ECM to control each individual injector?s ground circuits. There are two solenoid circuits within the injector; a Needle Control Valve and a Spill Valve. Although they are separate circuits, the same fault code is used to identify a fault in the Needle Control Valve circuit and/or the Spill Valve circuit.

Conditions for diagnostic trouble code (DTC):
1) Resistance too high
2) Injector (INJ) activated

Observable symptoms
1) Low Power
2) Uneven operation
3) Abnormal noise
4) Engine is operating on only 3 or 5 cylinders

Probable cause
1) Injector 5
2) Wiring harness between engine control module (ECM) and injector (INJ)

Conditions for diagnostic trouble code (DTC):
1) Unexpected electrical response

Observable symptoms
1) Power loss

Probable cause
1) Injector 5
2) EGR System
3) Fuel Quality
4) Low compression

Fuel Injector operation is controlled by the Engine Control Module (ECM). The ECM provides a common supply voltage to injectors 4,5,6 (Bank 2) and there are individual output transistor drivers inside the ECM to control each individual injector?s ground circuits. There are two solenoid circuits within the injector; a Needle Control Valve and a Spill Valve. Although they are separate circuits, the same fault code is used to identify a fault in the Needle Control Valve circuit and/or the Spill Valve circuit.

Conditions for diagnostic trouble code (DTC):
1) Resistance too high
2) Injector (INJ) activated

Observable symptoms
1) Low Power
2) Uneven operation
3) Abnormal noise
4) Engine is operating on only 3 or 5 cylinders

Probable cause
1) Injector 6
2) Wiring harness between engine control module (ECM) and injector (INJ)

Conditions for diagnostic trouble code (DTC):
1) Unexpected electrical response

Observable symptoms
1) Power loss

Probable cause
1) Injector 6
2) EGR System
3) Fuel Quality
4) Low compression

The (VECU) Vehicle Electronic Control Unit supplies and monitors the cranking signal to the starter motor relay. Several types of starter cranking protection are provided so the starter cannot be engaged in unwanted conditions. The starter cranking protection will also limit the maximum cranking time to 18 seconds without cycling the key

Conditions for diagnostic trouble code (DTC):
1) Output A14.EB:29 active
2) Short circuit to battery voltage
3) This diagnostic trouble code (DTC) is set only when the ignition key is held in the start position for approximately 3?s

Observable symptoms
1) Starter motor does not run

Probable cause
1) Wire between Engine Control Module (ECM) and starter motor relay
2) Starter motor relay (K65)

Conditions for diagnostic trouble code (DTC):
1) Short circuit to ground on A14.EB:29
2) Short circuit to ground on A127.A:51

Observable symptoms
1) Starter motor does not become activated
2) Engine does not start

Probable cause
1) Wire between Engine Control Module (ECM) and starter motor relay
2) Starter motor relay (K65)

The (VECU) Vehicle Electronic Control Unit supplies and monitors the cranking signal to the starter motor relay. Several types of starter cranking protection are provided so the starter cannot be engaged in unwanted conditions. The starter cranking protection will also limit the maximum cranking time to 18 seconds without cycling the key.

Observable symptoms
1) Starter motor does not run

Probable cause
1) Starter motor relay (K65)
2) Wire between Engine Control Module (ECM) and starter motor relay
3) Supply wire between the S15 connector and the K65 connector
4) Engine control module (ECM)