Volvo

Conditions for diagnostic trouble code (DTC):
1) Short circuit to battery voltage on A14.EB:23

Diagnostic operating conditions
1) Ignition key in ON position

Observable symptoms
1) Coolant level cannot be detected

Probable cause
1) Connector
2) Wiring harness
3) ECM – Engine Control Module

Conditions for diagnostic trouble code (DTC):
1) Short circuit to ground on A14.EB:23

Diagnostic operating conditions
1) Ignition key in ON position

Observable symptoms
1) Coolant level cannot be detected

Probable cause
1) Connector
2) Wiring harness
3) Engine Coolant Level (ECL) Sensor
4) ECM – Engine Control Module

The engine control module (ECM) monitors the intake manifold pressure (IMP) sensor and controls the boost air system (mainly controlled by the VGT) and the engine turbocharger compressor bypass valve. The ECM also uses parameters like engine speed (RPM) and turbocharger speed to make a calculation of the IMP. This estimated value should not differ too much from the measured value.

Conditions for diagnostic trouble code (DTC):
1) Poor intake manifold pressure (IMP) response

Observable symptoms
1) Power loss
2) Poor response

Probable cause
1) Charge air system leakage

The engine control module (ECM) monitors the intake manifold pressure (IMP) sensor and controls the boost air system (mainly controlled by the VGT) and the engine turbocharger compressor bypass valve. The ECM also uses parameters like engine speed (RPM) and turbocharger speed to make a calculation of the IMP. This estimated value should not differ too much from the measured value.

Conditions for diagnostic trouble code (DTC):
1) Regulation of Variable Geometry Turbo (VGT) or Exhaust Gas Recirkulation (EGR) system not possible

Probable cause
1) Turbocharger

The engine control module (ECM) monitors the intake manifold pressure (IMP) sensor and controls the boost air system (mainly controlled by the VGT) and the engine turbocharger compressor bypass valve. The ECM also uses parameters like engine speed (RPM) and turbocharger speed to make a calculation of the IMP. This estimated value should not differ too much from the measured value.

Conditions for diagnostic trouble code (DTC):
1) Charge pressure High

Probable cause
1) Faulty VGT position – The sensor shows a more open position than the actual position
2) Faulty EGR position – Valve more closed than it is supposed to
3) Turbocharger
4) Charge air pressure sensor

The engine control module (ECM) monitors the intake manifold pressure (IMP) sensor and controls the boost air system (mainly controlled by the VGT) and the engine turbocharger compressor bypass valve. The ECM also uses parameters like engine speed (RPM) and turbocharger speed to make a calculation of the IMP. This estimated value should not differ too much from the measured value.

Conditions for diagnostic trouble code (DTC):
1) Charge pressure Low

Observable symptoms
1) High soot level
2) Low Power

Probable cause
1) Charge air system leakage
2) Turbocharger
3) Charge air pressure sensor
4) Air Cleaner (ACL)
5) Faulty VGT position – The sensor shows a more closed position than the actual position
6) Faulty EGR position – Valve more open than it is supposed to

This diagnostic trouble code (DTC) is used to indicate temperatures at the engine control module (ECM). The DTC will be set if the ECM temperature is too high. A faulty ECM temperature can lead to power loss.

Conditions for diagnostic trouble code (DTC):
1) Internal fault in electronic control unit (ECU)

Probable cause
1) Engine control module (ECM)