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Engine Control Module (ECM) Diagnostic Trouble Codes - 4 of 9: Diagnosis Volvo V50 I рестайлинг

Testing & Diagnostics 4 illustrations ~3390 words

DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-281C

see DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-281C

DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2900

Condition

Scheme 77

Scheme 77: DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2900
Scheme 77: DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2900

The engine control module (ECM) controls the fuel pressure via the fuel pump (FP) control module using a pulse width modulation (PWM) signal. The fuel pump (FP) control module then controls the fuel pump (FP) depending on the pressure requested by the engine control module (ECM). The diagnostic trouble code (DTC) is stored if the control capacity of the engine control module (ECM) for fuel pressure reaches the highest or lowest value and the desired fuel pressure (target value) is not achieved.

The diagnostic trouble code (DTC) can be diagnosed when the engine is idling.

Substitute Value

  1. None.

Possible Source

  1. Leakage in the fuel lines
  2. Damaged fuel pressure sensor
  3. Damaged fuel pump
  4. Damaged fuel pump control module.

Fault symptom[s]

  1. Malfunction indicator lamp (MIL) lit
  2. Deterioration in performance
  3. The engine stops.

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2900

DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-290B

Condition

The engine control module (ECM) controls the fuel pressure via the fuel pump (FP) control module using a pulse width modulation (PWM) signal. The fuel pump (FP) control module then controls the fuel pump (FP) depending on the pressure requested by the engine control module (ECM). The diagnostic trouble code (DTC) is stored If the actual pressure (measured pressure from the fuel pressure sensor) pulses too much.

The diagnostic trouble code (DTC) can be diagnosed when the engine is idling.

Substitute Value

  1. None.

Possible Source

  1. Air in the fuel lines
  2. Blocked fuel lines
  3. Damaged fuel pressure sensor
  4. Damaged fuel pump
  5. Damaged fuel pump control module.

Fault symptom[s]

  1. Malfunction indicator lamp (MIL) lit
  2. Deterioration in performance
  3. The engine stops.

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-290B

DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-290C

Condition

The engine control module (ECM) controls the fuel pressure via the fuel pump (FP) control module using a pulse width modulation (PWM) signal. The fuel pump (FP) control module then controls the fuel pump (FP) depending on the pressure requested by the engine control module (ECM). The diagnostic trouble code (DTC) is stored if the actual pressure (measured pressure from the fuel pressure sensor) rises too high in comparison with the requested pressure (target pressure) during a certain time frame.

The diagnostic trouble code (DTC) can be diagnosed when the engine is idling.

Substitute Value

  1. None.

Possible Source

  1. Damaged fuel pressure sensor
  2. Damaged fuel pump control module.

Fault symptom[s]

  1. Malfunction indicator lamp (MIL) lit
  2. Deterioration in performance
  3. The engine stops.

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-290C

DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-290D

Condition

The engine control module (ECM) controls the fuel pressure via the fuel pump (FP) control module using a pulse width modulation (PWM) signal. The fuel pump (FP) control module then controls the fuel pump (FP) depending on the pressure requested by the engine control module (ECM). The diagnostic trouble code (DTC) is stored if the actual pressure (measured pressure from the fuel pressure sensor) is too low in comparison with the requested pressure (target pressure) during a certain time frame.

The diagnostic trouble code (DTC) can be diagnosed when the engine is idling.

Substitute Value

  1. None.

Possible Source

  1. Leakage at the fuel lines
  2. Damaged fuel pressure sensor
  3. Damaged fuel pump
  4. Damaged fuel pump control module.

Fault symptom[s]

  1. Malfunction indicator lamp (MIL) lit
  2. Deterioration in performance
  3. The engine stops.

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-290D

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-290D

DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-291B

Condition

The engine control module (ECM) controls the fuel pressure via the fuel pump (FP) control module using a pulse width modulation (PWM) signal. The fuel pump (FP) control module then controls the fuel pump (FP) depending on the pressure requested by the engine control module (ECM). The diagnostic trouble code (DTC) is stored if there is no PWM signal between the engine control module (ECM) and the fuel pump (FP) control module.

The diagnostic trouble code (DTC) can be diagnosed when the engine is running.

Substitute Value

  1. None.

Possible Source

  1. Short-circuit to supply voltage in the signal cable
  2. Damaged fuel pump control module.

Fault symptom[s]

  1. The starter motor turns but the engine does not start
  2. The engine stops.

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-291B

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-291B

DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-291C

Condition

The engine control module (ECM) controls the fuel pressure via the fuel pump (FP) control module using a pulse width modulation (PWM) signal. The fuel pump (FP) control module then controls the fuel pump (FP) depending on the pressure requested by the engine control module (ECM). The diagnostic trouble code (DTC) is stored if the PWM signal between the engine control module (ECM) and the fuel pump (FP) control module is too high.

The diagnostic trouble code (DTC) can be diagnosed when the engine is running.

Substitute Value

  1. None.

Possible Source

  1. Short-circuit to supply voltage in the signal cable
  2. Damaged fuel pump control module.

Fault symptom[s]

  1. The starter motor turns but the engine does not start
  2. The engine stops.

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-291C

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-291C

DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-291D

Condition

The engine control module (ECM) controls the fuel pressure via the fuel pump (FP) control module using a pulse width modulation (PWM) signal. The fuel pump (FP) control module then controls the fuel pump (FP) depending on the pressure requested by the engine control module (ECM). The diagnostic trouble code (DTC) is stored if the PWM signal between the engine control module (ECM) and the fuel pump (FP) control module is too low.

The diagnostic trouble code (DTC) can be diagnosed when the engine is running.

Substitute Value

  1. None.

Possible Source

  1. Short-circuit to ground in the signal cable
  2. Damaged fuel pump control module.

Fault symptom[s]

  1. The starter motor turns but the engine does not start
  2. The engine stops.

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-291D

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-291D

DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A00

Condition

The engine control module (ECM) checks the signal from the fuel temperature sensor. The fuel temperature sensor is integrated in the fuel pressure sensor. The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that the signal from the fuel temperature sensor is incorrect.

The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.

Substitute Value

  1. None.

Possible Source

  1. Contact resistance or oxidation in the terminals
  2. Short-circuit to supply voltage in the signal cable
  3. Short-circuit to ground in the signal cable.
  4. Open-circuit in the signal cable
  5. Open-circuit in the signal ground cable
  6. Damaged fuel temperature sensor.

Fault symptom[s]

  1. None.

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A00

Condition

Scheme 78

Scheme 78: DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A00
Scheme 78: DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A00

The engine control module (ECM) assumes two initial values for probe voltage, 0 V and 5 V. If probe preheating is active and if at least one fuel shut-off has been made, the heated oxygen sensor (HO2S) maximum value must have exceeded 0.3 V and the minimum value must have been below 1.0 V. The diagnostic trouble code (DTC) is stored and the engine control module (ECM) interprets it as a fault if these limit values are not achieved after approximately 5 minutes and both the accumulated and actual heated oxygen sensor preheating have reached certain limit values.

The diagnostic trouble code (DTC) can be diagnosed when the engine is running.

Substitute Value

  1. Center heated oxygen sensor (HO2S) control shut off.

Possible Source

Signal too high

  1. Short-circuit to supply voltage in the signal cable
  2. Damaged center heated oxygen sensor (HO2S).

Signal too low

  1. Short-circuit to ground in the signal cable
  2. Open-circuit in the signal cable
  3. Damaged center heated oxygen sensor (HO2S).

Fault symptom[s]

  1. Malfunction indicator lamp (MIL) lit.

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A00

DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A0A

Condition

The engine control module (ECM) measures the voltage difference between the maximum and minimum values for the center heated oxygen sensor (HO2S). The difference must be greater than 0.3 V.

The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that these parameters are not reached after approximately 5 minutes and the accumulated or actual probe preheating has reached its parameter.

The diagnostic trouble code (DTC) can be diagnosed approximately 5 minutes after starting (if probe preheating is active and at least one fuel shut-off has been made).

Substitute Value

  1. Center heated oxygen sensor (HO2S) control shut off.

Possible Source

  1. Contact resistance and/or oxidation in the terminals
  2. Damaged center heated oxygen sensor (HO2S).

Fault symptom[s]

  1. Malfunction indicator lamp (MIL) lit.

DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A0B

Condition

The engine control module (ECM) checks the signal from the fuel temperature sensor. The fuel temperature sensor is integrated in the fuel pressure sensor. The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that there is no signal from the fuel temperature sensor.

The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.

Substitute Value

  1. None.

Possible Source

  1. Contact resistance or oxidation in the terminals
  2. Short-circuit to supply voltage in the signal cable
  3. Short-circuit to ground in the signal cable.
  4. Open-circuit in the signal cable
  5. Open-circuit in the signal ground cable
  6. Damaged fuel temperature sensor.

Fault symptom[s]

  1. None.

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A0B

DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A0C

Condition

The engine control module (ECM) checks the signal from the fuel temperature sensor. The fuel temperature sensor is integrated in the fuel pressure sensor. The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that the signal from the fuel temperature sensor is too high.

The diagnostic trouble code (DTC) can be diagnosed at ignition on and with the engine running.

Substitute Value

  1. None.

Possible Source

  1. Short-circuit to ground in the signal cable
  2. Damaged temperature sensor.

Fault symptom[s]

  1. None.

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A0C

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A0C

DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION

Condition

Engine control module (ECM) checks the function of the middle oxygen sensor by monitoring how fast the sensor reacts when the system switches from rich to lean in case of a fuel shut-off.

The diagnostic trouble code (DTC) is stored if the control module detects that

  1. Voltage across middle heated oxygen sensor drops too slowly.
  2. Slow voltage-drop in case of more than 10 subsequent fuel shut-offs during the same driving cycle.

The control module's test for the diagnostic trouble code (DTC) starts in the event of

  1. Hot engine.
  2. Vehicle speed 70-90 km/h.
  3. Fuel shut-off.

Note. The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.

Substitute Value

  1. None.

Possible Source

  1. Contact resistance, oxidation or poor contact in connections.
  2. Damaged center heated oxygen sensor (HO2S).

Fault symptom[s]

  1. Malfunction indicator lamp (MIL) lit.

DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A0D

Condition

The engine control module (ECM) checks the signal from the fuel temperature sensor. The fuel temperature sensor is integrated in the fuel pressure sensor. The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects that the signal from the engine coolant temperature (ECT) sensor is too low.

The diagnostic trouble code (DTC) can be diagnosed at ignition on and with the engine running.

Substitute Value

  1. None.

Possible Source

  1. Contact resistance or oxidation in the terminals
  2. Short-circuit to supply voltage in the signal cable
  3. Open-circuit in the signal cable
  4. Open-circuit in the signal ground cable
  5. Damaged temperature sensor.

Fault symptom[s]

  1. None.

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A0D

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A0D

DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A10

Condition

The engine control module (ECM) controls the fuel temperature signal while driving. This is done through the control module comparing values from the intake, fuel and engine temperature sensors. If the signal from the fuel temperature sensor matches a temperature that exceeds a certain limit in relation to the other, the control module interprets this as a malfunction and the diagnostic trouble code (DTC) is generated.

The diagnostic trouble code (DTC) can be diagnosed when the engine is idling.

Substitute Value

  1. Predefined value for fuel temperature.

Possible Source

  1. Contact resistance or oxidation in the terminals
  2. Damaged fuel temperature sensor.

Fault symptom[s]

  1. Malfunction indicator light (MIL), on

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A10

Condition

The engine control module (ECM) checks whether there is a short-circuit to ground or supply voltage in the preheating circuit for the center heated oxygen sensor (HO2S). It also checks for an open-circuit or whether the heating resistor is faulty. The diagnostic trouble code (DTC) is stored if is stored if the engine control module (ECM) registers any of these.

The diagnostic trouble code (DTC) can be diagnosed at ignition on and if the battery voltage is in the range 11-16 V.

Substitute Value

  1. Center heated oxygen sensor (HO2S) preheating shut off.

Possible Source

Signal too low

  1. Damaged fuse.
  2. Open-circuit in the power cable
  3. Short-circuit to ground in the power cable
  4. Damaged center heated oxygen sensor (HO2S).

Signal too high

  1. Short-circuit to supply voltage in the power cable
  2. Damaged center heated oxygen sensor (HO2S).

Faulty signal

  1. Contact resistance and/or oxidation in the terminals
  2. Damaged center heated oxygen sensor (HO2S).

Fault symptom[s]

  1. Malfunction indicator lamp (MIL) lit.

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A10

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A10

DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A1B

Condition

The engine control module (ECM) controls the fuel temperature signal while driving. This is done through the control module comparing values from the intake, fuel and engine temperature sensors. If the signal from the fuel temperature sensor matches a temperature that is below a certain limit in relation to the other, the control module interprets this as a malfunction and the diagnostic trouble code (DTC) is generated.

The diagnostic trouble code (DTC) can be diagnosed when the engine is idling.

Substitute Value

  1. Predefined value for fuel temperature.

Possible Source

  1. Contact resistance or oxidation in the terminals
  2. Damaged fuel temperature sensor.

Fault symptom[s]

  1. Malfunction indicator light (MIL), on

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A1B

DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A1C

Condition

Scheme 79

Scheme 79: DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A1C
Scheme 79: DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A1C

Engine Control Module (ECM) checks the signal for fuel temperature at start. This is done by the control module saving the values from inlet, fuel and engine temperature sensors at the moment of start. Then the control module compares the values. If the signal from the fuel temperature sensor matches a temperature that exceeds a certain limit in relation to the other, the control module interprets this as a malfunction and the diagnostic trouble code (DTC) is generated.

The diagnostic trouble code (DTC) can be diagnosed after approx. 10 minutes with the engine running.

Substitute Value

  1. Predefined value for fuel temperature.

Possible Source

  1. Damaged fuel temperature sensor.
  2. Contact resistance or oxidation in the terminals.

Fault symptom[s]

  1. Malfunction indicator light (MIL), on

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A1C

DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A1D

Condition

Engine Control Module (ECM) checks the signal for fuel temperature at start. This is done by the control module saving the values from inlet, fuel and engine temperature sensors at the moment of start. Then the control module compares the values. If the signal from the fuel temperature sensor matches a temperature that is below a certain limit in relation to the other, the control module interprets this as a malfunction and the diagnostic trouble code (DTC) is generated.

The diagnostic trouble code (DTC) can be diagnosed after approx. 10 minutes with the engine running.

Substitute Value

  1. Predefined value for fuel temperature.

Possible Source

  1. Damaged fuel temperature sensor.
  2. Contact resistance or oxidation in the terminals.

Fault symptom[s]

  1. Malfunction indicator light (MIL), on

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2A1D

DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2B00

Condition

The engine control module (ECM) checks the signal from the fuel temperature sensor.

The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers a fault in the signal from the fuel temperature sensor.

The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.

Substitute Value

  1. The fuel temperature is set to a calculated value.

Possible Source

Signal too high

  1. Short-circuit to supply voltage in the signal cable
  2. Damaged fuel temperature sensor.

Signal too low

  1. Short-circuit to ground in the signal cable
  2. Open-circuit in the signal cable
  3. Damaged fuel temperature sensor.

Fault symptom[s]

  1. None.

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2B00

Condition

During the engine warm up phase the way the engine temperature should increase is calculated. Factors such as engine load and the start temperature are taken into account. This test takes place during the engine warm-up phase (under "normal operation") and continues until the engine temperature has reached 84 °C. For the test to start, the starting temperature of the engine must be below 35 °C, the outside temperature must be between -7 and +35 °C and at least 15 minutes must have passed since the engine was last run.

The diagnostic trouble code (DTC) is stored if the calculated increase in temperature does not correspond to the actual increase (measured by the engine coolant temperature (ECT) sensor).

HINT: This diagnostic trouble code (DTC) can also be caused by faults that store diagnostic trouble codes (DTCs) for outside temperature sensors.

Substitute Value

  1. None.

Possible Source

  1. Damaged engine coolant temperature (ECT) sensor
  2. Damaged thermostat.

Fault symptom[s]

  1. Malfunction indicator lamp (MIL) lit.

See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2B00

DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-2B0A

Condition

The engine control module (ECM) checks the signal from the fuel temperature sensor.

The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects that the value from the fuel temperature sensor deviates too much from the values for engine coolant and intake temperature after the engine has been switched off for an extended period.

The diagnostic trouble code (DTC) is diagnosed once per operating cycle when the ignition is switched on, but only when the engine temperature has dropped by approximately 60 °C from operating temperature (>70 °C) since the previous operating cycle.

Substitute Value

  1. The fuel temperature is set to a calculated value.

Possible Source

  1. Contact resistance in the connectors
  2. Damaged fuel temperature sensor.

Fault symptom[s]

  1. None.

DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-3000

Condition

Scheme 80

Scheme 80: DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-3000
Scheme 80: DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-3000

The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects that the signal from the camshaft position (CMP) sensor (intake) is missing, or if the engine control module (ECM) detects too few flank changes during a set number of crankshaft revolutions.

The diagnostic trouble code (DTC) can be diagnosed when the starter motor is turning.

Substitute Value

  1. The signal from the engine speed (RPM) sensor is used.

Possible Source

  1. Open-circuit in the signal cable
  2. Short-circuit to ground in the signal cable
  3. Short-circuit to supply voltage in the signal cable
  4. Damaged camshaft position (CMP) sensor.

Fault symptom[s]

  1. None.

DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-300A

Condition

The engine control module (ECM) checks that 5 camshaft flanks are detected during 2 crankshaft revolutions (i. e. that all camshaft flanks are detected on one camshaft revolution). The diagnostic trouble code (DTC) is stored if fewer camshaft flanks are detected.

The diagnostic trouble code (DTC) can be diagnosed when the engine speed (RPM) is higher than a set value and refers to the camshaft position (CMP) sensor for the intake camshaft.

Substitute Value

  1. The signal from the engine speed (RPM) sensor is used.

Possible Source

  1. Intermittent open-circuit in wiring or splices
  2. Incorrectly adjusted camshafts
  3. Incorrectly installed camshaft position (CMP) sensor
  4. Damaged camshaft position (CMP) sensor.

Fault symptom[s]

  1. None.

DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-3010

Condition

The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects that the signal from the camshaft position (CMP) sensor (exhaust) is missing, or if the engine control module (ECM) detects too few flank changes during a set number of crankshaft revolutions.

The diagnostic trouble code (DTC) can be diagnosed when the starter motor is turning.

Substitute Value

  1. The signal from the engine speed (RPM) sensor is used.

Possible Source

  1. Open-circuit in the signal cable
  2. Short-circuit to ground in the signal cable
  3. Short-circuit to supply voltage in the signal cable
  4. Damaged camshaft position (CMP) sensor.

Fault symptom[s]

  1. None.

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