Dynamic Stability Assist (Dsa) & Engine Control Module (ECM) Diagnostic Trouble Codes: Diagnosis

Diagnostic trouble code (DTC) information

Condition

Scheme 16

Scheme 16: Diagnostic trouble code (DTC) information

Diagnostic trouble code (DTC) DSA-112 is stored if the DSA control module detects that the EEPROM memory is defective when the ignition is on or the engine is running.

Note. The diagnostic trouble code (DTC) is only stored as long as the ignition is on / the engine is running and the fault is permanent. If the fault disappears (becomes intermittent) the diagnostic trouble code (DTC) will no longer be stored.

Substitute Value

The DSA function is disconnected.

Possible Source

Defective control module.

Fault symptom[s]

The DSA warning lamp lights.
The anti-spin function is not operative while the DSA function is disengaged.

Scheme 17

Scheme 17: Checking the DSA control module

Scheme 18

Ignition off.
Start the engine.
Read off diagnostic trouble codes (DTCs). Check whether diagnostic trouble code (DTC) DSA-112 is still stored.

Is diagnostic trouble code (DTC) DSA-112 still stored?

YES Refer to «EEPROM memory fault. Permanent fault»(ref-441334-S26758345402011121500000)
NO FAULT NOT FOUND: Troubleshooting has been completed.

See Diagnostic trouble code (DTC) information

Condition

Scheme 19

Scheme 19: Diagnostic trouble code (DTC) information

When the DSA switch is not activated, the signal to the DSA control module is high. The signal to the DSA control module is grounded when the switch is pressed in. This engages or disengages the DSA function. Diagnostic trouble code (DTC) DSA-121 is stored if the DSA control module registers that the signal from the switch is low for more than approximately 60 seconds when the engine is running.

Note. The diagnostic trouble code (DTC) can then be stored if the DSA button is held pressed in for more than approximately 60 seconds. Fault causes of this type are not included in the fault-tracing procedure.

Substitute Value

The DSA function is disengaged.

Possible Source

Short-circuit to ground in the signal cable.
Defective switch.

Fault symptom[s]

The DSA warning lamp lights.
The anti-spin function is not operative while the DSA function is disengaged.

Scheme 20

Control module connected.
Start the engine.
Read off the status of the switch. Check the function of the switch: OFF should be displayed when the switch is unaffected. On should be displayed when the switch is activated (pressed in).

Is the function of the switch OK?

YES Refer to «Signal too low. Intermittent fault»(ref-441334-S36731784752011121500000)
NO Refer to «Checking the signal cable»(ref-441334-S06769528502011121500000)

Condition

Scheme 21

Scheme 21: Diagnostic trouble code (DTC) information

Substitute Value

The DSA function is disengaged.

Possible Source

Short-circuit to ground in the signal cable
Defective switch.

Fault symptom[s]

The DSA warning lamp lights
The anti-spin function is not operative while the DSA function is disengaged.

See Diagnostic trouble code (DTC) information

Condition

Scheme 22

Scheme 22: Diagnostic trouble code (DTC) information

Diagnostic trouble code (DTC) DSA-122 is stored if the DSA control module detects that the current in the circuit for the bulb in the combined instrument panel is too large or too small when the ignition is on or the engine is running.

Note. A diagnostic trouble code (DTC) may be stored if a DSA control module for model year 2003- is installed in a -2002 model year car.

Substitute Value

When the DSA warning lamp cannot indicate if the DSA function is disengaged or engaged, the DSA function is always connected. The DSA function cannot be disengaged with the switch.

Possible Source

Open-circuit in the signal cable
Short-circuit to supply voltage or ground in the signal cable
Defective bulb
Defective combined instrument panel.

Fault symptom[s]

Certain faults can cause the DSA warning lamp to light continuously
The DSA function cannot be disengaged with the switch.

See Diagnostic trouble code (DTC) information

Condition

Scheme 23

Scheme 23: Diagnostic trouble code (DTC) information

When the DSA control module registers that the speed at one of the front wheels increases too much (spins), the DSA control module transmits a signal requesting torque limiting to the engine control module (ECM). Diagnostic trouble code (DTC) DSA-131 is stored if the DSA control module registers that the current in the circuit for the engine control module (ECM) is too large or too small with the engine running.

Substitute Value

The DSA function is disengaged.

Possible Source

Open-circuit in the signal cable
Short-circuit to supply voltage or ground in the signal cable
Contact resistance in the terminals.

Fault symptom[s]

The DSA warning lamp lights
The anti-spin function is not operative while the DSA function is disengaged.

See Diagnostic trouble code (DTC) information

Condition

Scheme 24

Scheme 24: Diagnostic trouble code (DTC) information

The DSA control module terminal is grounded via the stop (brake) lamp bulbs when the stop (brake) lamp switch is not activated. The DSA control module (and bulbs) are supplied with battery voltage supply when the stop (brake) light switch is activated. If the vehicle speed is in excess of 50 km/h and the DSA control module registers that the signal is too high (high voltage) continuously for 15 minutes, the DSA control module interprets it as being outside the permitted range. Diagnostic trouble code (DTC) DSA-211 is stored.

Substitute Value

The DSA function is disengaged.

Note. This fault is considered to be serious. If the status of the fault changes to intermittent, the DSA function will not be engaged until the diagnostic trouble code (DTC) has been erased.

Possible Source

Open-circuit in the signal cable
Short-circuit to supply voltage in the signal cable
Incorrectly adjusted stop (brake) lamp switch
Defective stop (brake) light switch.

Fault symptom[s]

The DSA warning lamp lights
The anti-spin function is not operative while the DSA function is disengaged.

Fault cause and diagnostic testing for contact resistance and oxidation

The cause of the diagnostic trouble code (DTC) was loose connections in the DSA control module connector.

Check the control module connector for contact resistance and oxidation according to Contact resistance and oxidation. Remedy if necessary.

Continue Refer to «Verification»(ref-441334-S04881158122011121500000)

See Diagnostic trouble code (DTC) information

Condition

The DSA control module terminal is grounded via the stop lamp bulbs when the stop lamp switch is unaffected. The DSA control module (and bulbs) are supplied with battery voltage when the stop light switch is activated. Diagnostic trouble code (DTC) DSA-212 is stored if the DSA control module registers, when the engine is running, that there is no ground connection via the bulbs, or that the signal (voltage) during braking is lower than battery voltage as a result of a drop in the voltage supply.

Substitute Value

The DSA function is disengaged.

Possible Source

Open-circuit in the signal cable
Contact resistance in the terminals
Voltage drop in the power supply.

Fault symptom[s]

The DSA warning lamp lights
The anti-spin function is not operative while the DSA function is disengaged.

See Diagnostic trouble code (DTC) information

Condition

Scheme 25

Scheme 25: Diagnostic trouble code (DTC) information

The load signal from the engine control module (ECM) is a pulsed signal (between approximately 0 V and battery voltage) with a variable frequency and pulse ratio (% duty). The frequency increases with engine speed. The pulse ratio increases with load. Diagnostic trouble code (DTC) DSA-221 is stored if the DSA control module registers that there are no pulses from the engine control module (ECM) for approximately 1.5 seconds.

Substitute Value

The DSA function is disengaged.

Possible Source

Open-circuit in the signal cable.
Short-circuit to supply voltage or ground in the signal cable.
Intermittent open-circuit in the supply voltage or the ground lead for the DSA control module.
Contact resistance in the terminals.

Fault symptom[s]

The DSA warning lamp lights.
The anti-spin function is not operative while the DSA function is disengaged.

See Diagnostic trouble code (DTC) information

Condition

The load signal from the engine control module (ECM) is a pulsed signal (between approximately 0 V and battery voltage) with a variable frequency and pulse ratio (% duty). The frequency increases with engine speed. The pulse ratio increases with load. Diagnostic trouble code (DTC) DSA-222 is stored if the DSA control module registers that the frequency (engine speed) changes too quickly or that the pulse ratio (load) is based on implausible maximum or minimum values from the engine control module (ECM).

Substitute Value

The DSA function is disengaged.

Possible Source

Signal cable interference.
Intermittent open-circuit in the signal cable.
Intermittent short-circuit to supply voltage or ground in the signal cable.
Contact resistance in the terminals.

Fault symptom[s]

The DSA warning lamp lights.
The anti-spin function is not operative while the DSA function is disengaged.

See Diagnostic trouble code (DTC) information

Condition

Scheme 26

Scheme 26: Diagnostic trouble code (DTC) information

The DSA control module establishes communication with the engine control module (ECM) when the engine speed exceeds 600 RPM for the first time in the ignition cycle. This informs the engine control module (ECM) that there is a DSA system. The communication between the control modules is via cables for the load signal and the torque limiting signal. The engine control module (ECM) replies to the DSA control module with a special signal. Diagnostic trouble code (DTC) DSA-223 is stored within approximately 3 seconds if the DSA control module registers that the response is missing or deviates from the permitted value.

Substitute Value

The DSA function is disengaged.

Possible Source

Fault in the engine management system.
Intermittent open-circuit in the supply voltage or the ground lead for the DSA control module.

Fault symptom[s]

The DSA warning lamp lights.
The anti-spin function is not operative while the DSA function is disengaged.

Checking the status of the diagnostic trouble code (DTC)

Ignition off.
Start and stop the engine a few times.
Let the engine idle. Read off diagnostic trouble codes (DTCs).

Is diagnostic trouble code (DTC) DSA-223 still stored?

YES Refer to «Checking the DSA control module»(ref-441334-S18204390902011121500000)
NO Refer to «Faulty signal. Intermittent fault»(ref-441334-S24414127072011121500000)

See Diagnostic trouble code (DTC) information

Condition

If a fault has occurred in the engine management system which affects the fuel shut-off system, the engine control module (ECM) transmits a load signal (TQ) with a specific value to the DSA control module. Diagnostic trouble code (DTC) DSA-224 is stored when the DSA control module has received this specific signal.

Note. The diagnostic trouble code (DTC) is only stored as long as the ignition is on / the engine is running and the fault is permanent. If the fault in the engine management system disappears (the fault becomes intermittent) the diagnostic trouble code (DTC) will no longer be stored in the DSA control module.

Substitute Value

The DSA function is disengaged.

Possible Source

One or more diagnostic trouble codes (DTCs) has been stored in the engine control module (ECM)
Intermittent open-circuit in the supply voltage or the ground terminals for the engine control module (ECM).

Fault symptom[s]

The DSA warning lamp lights
The anti-spin function is not operative while the DSA function is disengaged.

Checking diagnostic trouble codes (DTCs) in the engine control module (ECM)

HINT: Diagnostic trouble codes (DTC) DSA-224 are stored if any of the following diagnostic trouble codes (DTCs) are permanently stored in the engine control module (ECM) and if the fault is permanent: EFI-115, EFI-121, EFI-125, EFI-135, EFI-137, EFI-145, EFI-337, EFI-411, EFI-525 or EFI-526.

Start the engine and let it idle. Read off diagnostic trouble codes (DTCs) from the engine control module (ECM) .

Have any of the above diagnostic trouble codes (DTCs) been stored?

YES Refer to «Checking diagnostic trouble codes (DTCs) in the engine control module (ECM)»(ref-441334-S21159535852011121500000)
NO Refer to «Checking wiring and terminals»(ref-441334-S10363373322011121500000)

HINT: All diagnostic trouble codes (DTCs) in EMS 2000 must be remedied before diagnostic trouble code (DTC) DSA-224 can be remedied.

Start the engine and let it idle. Read off diagnostic trouble codes (DTCs) from the engine control module (ECM) .

Have any diagnostic trouble codes (DTCs) for EMS 2000 been stored?

YES Refer to «Checking diagnostic trouble codes (DTCs) in the engine control module (ECM)»(ref-441334-S21159535852011121500000)
NO Refer to «Checking wiring and terminals»(ref-441334-S10363373322011121500000)

Fault-trace according to the relevant system.

See Diagnostic trouble code (DTC) information

Diagnostic trouble code (DTC) stored in the engine control module (ECM)

See Diagnostic trouble code (DTC) stored in the engine control module (ECM)

See Diagnostic trouble code (DTC) information

See Diagnostic trouble code (DTC) stored in the engine control module (ECM)

Condition

Substitute Value

The DSA function is disengaged.

Possible Source

Open-circuit in the signal cable.
Short-circuit to supply voltage or ground in the signal cable.
Contact resistance in the terminals.

Fault symptom[s]

The DSA warning lamp lights.
The anti-spin function is not operative while the DSA function is disengaged.

See Diagnostic trouble code (DTC) information

Condition

Substitute Value

The DSA function is disengaged.

Possible Source

Signal cable interference.
Defective throttle position (TP) sensor.
Intermittent open-circuit in the signal cable.
Intermittent short-circuit to supply voltage or ground in the signal cable.

Fault symptom[s]

The DSA warning lamp lights.
The anti-spin function is not operative while the DSA function is disengaged.

See Diagnostic trouble code (DTC) information

Condition

The throttle position (TP) sensor signal from the engine control module (ECM) is a pulsed signal (between approximately 0 V and battery voltage) with a fixed frequency (approximately 50 Hz). The pulse ratio (% duty) changes as the throttle opens. If the engine control module (ECM) registers a fault in the signal from the throttle position (TP) sensor, the engine control module (ECM) transmits a special throttle position (TP) sensor signal to the DSA control module. This informs the DSA control module that the throttle position (TP) sensor signal to the engine control module (ECM) is faulty. Diagnostic trouble code (DTC) DSA-233 is stored when the DSA control module has received this signal.

Note. The diagnostic trouble code (DTC) is only stored as long as the ignition is on / the engine is running and the fault is permanent. If the fault in the engine management system disappears (the fault becomes intermittent) the diagnostic trouble code (DTC) in the DSA control module will no longer be stored.

Substitute Value

The DSA function is disengaged.

Possible Source

A diagnostic trouble code (DTC) for the throttle position (TP) sensor has been stored in the engine control module (ECM).

Fault symptom[s]

The DSA warning lamp lights.
The anti-spin function is not operative while the DSA function is disengaged.

Read off diagnostic trouble codes (DTCs) from the engine control module (ECM) . Fault-trace according to the system information.

Scheme 27

Scheme 27: Checking diagnostic trouble codes (DTCs) in the engine control module (ECM)

See Diagnostic trouble code (DTC) information

See Diagnostic trouble code (DTC) stored in the engine control module (ECM)

See Diagnostic trouble code (DTC) information

See Diagnostic trouble code (DTC) stored in the engine control module (ECM)

Condition

Scheme 28

Scheme 28: Diagnostic trouble code (DTC) information

The DSA control module receives wheel speed signals from the ABS control module. The ABS control module converts the wheel sensor AC signal into a pulsed signal for the DSA control module. The signal is pulsed between approximately 0 V and battery voltage. It has a fixed pulse ratio (%duty approx. 50 %) where the frequency changes with the wheel speed.

Depending on the current wheel speed signal, DTCs DSA-311, DSA-312, DSA-313 or DSA-314 are stored if the vehicle speed exceeds 8 km/h and the DSA control module registers that

Wheel speed increase or reduction is too great.
The speed of a wheel is less or the same as half the speed of one of the rear wheels.
The speed signal varies considerably.

Substitute Value

The DSA function is disengaged.

Possible Source

Open-circuit in the signal cable.
Short-circuit to supply voltage or ground in the signal cable.
Interference in the wheel sensor circuit.
Contact resistance in the terminals.

Note. Diagnostic trouble code(s) (DTC(s)) may be stored if the car is driven with one or more wheels locked. Fault causes of this type are not included in the fault-tracing procedure.

Note. Diagnostic trouble code(s) (DTC(s)) may be stored if the power supply and / or the ground terminal for the ABS control module is defective. Fault causes of this type are not included in the fault-tracing procedure.

Fault symptom[s]

The DSA warning lamp lights.
The anti-spin function is not operative while the DSA function is disengaged.

Scheme 29

Ignition on.
Read off the wheel speeds.
Raise the car so that the relevant wheel is clear of the ground. Spin the relevant wheel. Check the wheel speed.

Is the wheel speed OK?

YES Refer to «Faulty signal. Intermittent fault»(ref-441334-S26773109502011121500000)
NO Refer to «Checking the resistance in the signal cable»(ref-441334-S32887803082011121500000)

See Diagnostic trouble code (DTC) information

Condition

If an injector circuit is short-circuited to ground / voltage or if there is an open-circuit in the circuit the control module interprets it as a fault and a diagnostic trouble code (DTC) is stored for the injector.

Substitute Value

Fuel trim disabled.

Possible Source

Signal too high

Short-circuit to supply voltage in the signal cable
Faulty injector.

Signal too low

Short-circuit to ground in the signal cable.

Signal missing

Open-circuit in the signal cable
Faulty injector.

Fault symptom[s]

Engine not firing on all cylinders
Engine does not start
Malfunction indicator lamp (MIL) lit.

See Diagnostic trouble code (DTC) information

Scheme 30

Scheme 31

Ignition off Check the connector for the affected injector. Check for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S00267239222011121500000). Check the signal cable between the affected injector terminal #2 and engine control module (ECM) terminal #59 (ECM-1E), terminal #90 (ECM-1F), terminal #60 (ECM-20) or terminal #89 (ECM-21). Check the power supply cable between the system relay terminal #5 (87) and the affected injector terminal #1. Check these cables for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000). HINT: The voltage must be approximately 12 V between injector terminals #1 and #2 (control module side) for approximately 2 seconds after the ignition is switched on. Remedy as necessary. Other information To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) To access or replace the injector, see «Replacing the injector(s)»(ref-441337-S11100081512011121500000) For information about signals, see «Signal specification»(ref-441338-S16642011902011121500000).

Continue Refer to «Information»(ref-441334-S40705965452011121500000)

See Diagnostic trouble code (DTC) information

Selecting diagnostic trouble code (DTC)

Which diagnostic trouble code (DTC) has the engine control module (ECM) stored?

ECM-1E Refer to «Verification»(ref-441334-S12283788972011121500000)
ECM-1F Refer to «Verification»(ref-441334-S11561586582011121500000)
ECM-20 Refer to «Verification»(ref-441334-S37450210672011121500000)
ECM-21 Refer to «Verification»(ref-441334-S03664724062011121500000)

Scheme 32

Ignition off
Reconnect the connectors, reinstall components etc.
Connect VCT 2000
Ignition on. Activate the injectors using VCT 2000 according to «Description of activations»(ref-441338-S37270559222011121500000).

Do the injectors click?

YES OKAY: Troubleshooting has been completed.
NO Refer to «Information»(ref-441334-S23902454012011121500000)

See Diagnostic trouble code (DTC) information

Which diagnostic trouble code (DTC) has the engine control module (ECM) stored?

ECM-1E Refer to «Verification»(ref-441334-S26786681572011121500000)
ECM-1F Refer to «Verification»(ref-441334-S11154875532011121500000)
ECM-20 Refer to «Verification»(ref-441334-S10014950172011121500000)
ECM-21. Refer to «Verification»(ref-441334-S30403937552011121500000)

See Diagnostic trouble code (DTC) information

Condition

Scheme 33

Scheme 33: Diagnostic trouble code (DTC) information

Diagnostic trouble code (DTC) ECM-5C is stored if the canister purge (CP) valve signal cable is short-circuited to ground or voltage or if there is an open-circuit in the circuit.

Substitute Value

No leak diagnostic
No idle air trim adaptation
No long-term fuel trim.

Possible Source

Signal too high

Short-circuit to supply voltage in the signal cable
Defective canister purge (CP) valve.

Signal too low

Short-circuit to ground in the signal cable.

Signal missing

Open-circuit in the signal cable
Contact resistance and oxidation.

Fault symptom[s]

Malfunction indicator lamp (MIL) lit
High idling speed
Low idling speed.

See Diagnostic trouble code (DTC) information

Condition

Scheme 34

Scheme 34: Diagnostic trouble code (DTC) information

Diagnostic trouble code (DTC) ECM-0A is stored If the atmospheric pressure sensor circuit is short-circuited to ground or voltage or if there is an open-circuit in the circuit.

Substitute Value

90 kPa (approximately 1000 meters above sea-level)
No leak diagnostic.

Possible Source

Signal too high

Short-circuit to supply voltage in the signal cable
Faulty atmospheric pressure sensor.

Signal too low

Short-circuit to ground in signal cable
Open-circuit in the signal cable
Faulty atmospheric pressure sensor.

Fault symptom[s]

Malfunction indicator lamp (MIL) lit.

See Diagnostic trouble code (DTC) information

Condition

Diagnostic trouble code (DTC) ECM-0B is stored is stored if the control module detects that the atmospheric pressure sensor signal is lower that the boost pressure sensor signal when the ignition is on, the engine is not running and no diagnostic trouble code (DTC) is stored for the boost pressure sensor.

Substitute Value

EVAP control only at idling, no leak diagnostic.

Possible Source

Contact resistance in the wiring
Defective atmospheric pressure sensor.

Fault symptom[s]

None.

See Diagnostic trouble code (DTC) information

Condition

Scheme 35

Scheme 35: Diagnostic trouble code (DTC) information

Diagnostic trouble code (DTC) ECM-0C is stored if the control module detects that the signal from the boost pressure sensor is too high, too low or missing.

Substitute Value

EVAP diagnostic disabled.

Possible Source

Signal too high

Short-circuit to supply voltage in the signal cable
Open-circuit in the ground lead
Contact resistance in the terminals
Defective boost pressure sensor.

Signal too low

Open-circuit in the signal cable
Short-circuit to ground in the signal cable
Open-circuit in the power supply cable for the boost pressure sensor
Contact resistance in the terminals
Defective boost pressure sensor.

Fault symptom[s]

Malfunction indicator lamp (MIL) lit.

Scheme 36

Ignition off. Check the boost pressure sensor connector for intermittent contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S00267239222011121500000) and loose connections according to «Loose connections (terminals)»(ref-441291-S22081329982011121500000). Check for damage carefully. Check the cable between boost pressure sensor terminal 3 and control module terminal 13 for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-441291-S39506668312011121500000) and the cable between boost pressure sensor terminal 2 and ground for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000). Remedy as necessary. Other information: To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) For information about signals, see «Signal specification»(ref-441338-S16642011902011121500000) To replace the boost pressure sensor, see «Replacing the atmospheric pressure sensor»(ref-441335-S15233333552011121500000).

Continue Refer to «Information»(ref-441334-S32579790212011121500000)

Condition

Diagnostic trouble code (DTC) ECM-0C is stored if the control module detects that the signal from boost pressure sensor 2 is too high, too low or missing.

Substitute Value

The EVAP diagnostic is disabled.

Possible Source

Signal too high

Short-circuit to supply voltage in the signal cable
Open-circuit in the ground lead
Contact resistance in the terminals
Defective boost pressure sensor 2.

Signal too low

Open-circuit in the signal cable
Short-circuit to ground in the signal cable
Open-circuit in the power supply cable for boost pressure sensor 2
Contact resistance in the terminals
Defective boost pressure sensor 2.

Fault symptom[s]

Malfunction indicator lamp (MIL) lit.

See Diagnostic trouble code (DTC) information

Condition

Diagnostic trouble code (DTC) ECM-0D is stored (signal too low) if the boost pressure sensor value is lower than the atmospheric pressure sensor value when the ignition is on and the engine is not running. Diagnostic trouble code (DTC) ECM-0D is stored (signal too high) if the boost pressure sensor value is higher than expected when the engine is running.

Substitute Value

The leak diagnostic is disabled.

Possible Source

Signal too low

Contact resistance in the terminals
Defective boost pressure sensor.

Signal too high

Contact resistance in the terminals
Defective boost pressure system
Defective boost pressure sensor.

Fault symptom[s]

Malfunction indicator lamp (MIL) lit
Idle speed too high
Idle speed too low.

Condition

The control module checks the signal from the boost pressure sensor 2 (MAP sensor) if the module has not detected a fault in boost pressure sensor 1 or the mass air flow (MAF) sensor.

Diagnostic trouble code (DTC) ECM-0D is stored if the signal from boost pressure sensor 2 (MAP sensor) is lower than a certain limit (signal too low) when the ignition is on but the engine is not running. Diagnostic trouble code (DTC) ECM-0D is also stored if the signal from boost pressure sensor 2 (MAP sensor) is higher than a certain limit (signal too high) when the engine is running.

Substitute Value

No leak diagnostic.

Possible Source

Signal too low

Contact resistance in the terminals
Defective boost pressure sensor 2.

Signal too high

Defective boost pressure system
Defective boost pressure sensor 2.

Fault symptom[s]

Malfunction indicator lamp (MIL) lit.

See Diagnostic trouble code (DTC) information

Condition

Scheme 37

Scheme 37: Diagnostic trouble code (DTC) information

Diagnostic trouble code (DTC) ECM-0F is stored if the control module receives a signal from the intake air temperature (IAT) sensor which corresponds to a temperature lower than -48 °C (low signal) or higher than +142 °C (high signal).

Substitute Value

When driving: latest correct values
Adaptation values not updated.

Possible Source

Signal too high

Short-circuit to supply voltage in the signal cable
Open-circuit in the signal cable or in the ground lead
Faulty intake air temperature (IAT) sensor.

Signal too low

Short-circuit to ground in the signal cable
Faulty intake air temperature (IAT) sensor.

Fault symptom[s]

Malfunction indicator lamp (MIL) lit
No leak diagnostic.

See Diagnostic trouble code (DTC) information

Condition

Diagnostic trouble code (DTC) ECM-10 is stored if the control module detects changes in the air temperature within the normal operating range of the intake air temperature (IAT) sensor that are too rapid.

Substitute Value

The Wastegate diagnostic is disabled
The EVAP diagnostic is disabled
Limited EVAP control
No fuel trim adaptation
No idling speed adaptation.

Possible Source

Contact resistance in the terminals
Defective intake air temperature (IAT) sensor
Intermittent open-circuit, short-circuit to ground or short-circuit to supply voltage in the signal cable
Intermittent open-circuit or short-circuit to supply voltage in the ground lead.

Fault symptom[s]

Malfunction indicator lamp (MIL) lit
High fuel consumption
High idling speed
Low idling speed.

See Diagnostic trouble code (DTC) information

Condition

Scheme 38

Scheme 38: Diagnostic trouble code (DTC) information

Diagnostic trouble code (DTC) ECM-13 is stored if the control module detects that the signal from the mass air flow (MAF) sensor is too high or too low.

Substitute Value

Initial boost pressure
No idle air trim adaptation
No long-term fuel trim
No three-way catalytic converter (TWC) diagnostic
Limited EVAP control
The boost pressure sensor and the intake air temperature (IAT) sensor are used to calculate the mass air flow.

Possible Source

Signal too high

Short-circuit to supply voltage in the signal cable
Open-circuit in the ground lead
Faulty mass air flow (MAF) sensor.

Signal too low

Short-circuit to ground in signal cable
Open-circuit in the signal cable or the power supply
Air leakage in the intake system
Faulty mass air flow (MAF) sensor
Faulty idle air control (IAC) system.

Fault symptom[s]

High idling speed
Low idling speed
Malfunction indicator lamp (MIL) lit.

See Diagnostic trouble code (DTC) information

Diagnostic trouble code information

Condition

The engine control module (ECM) calculates a value for air mass using the signal from the boost pressure sensor and the air temperature sensor. The control module compares the calculated value to the signal from the mass air flow sensor. The diagnostic trouble code (DTC) is generated if the sensor signal does not match the calculated value.

The diagnostic trouble code can be diagnosed when the ignition is on.

Substitute Value

Fuel system diagnostics is blocked.
The control module makes air mass calculations with the help of the boost pressure sensor and the air temperature sensor.

Possible Source

Contact resistance in the terminals
Air leaks in the induction system.
Damaged boost pressure sensor 2 (MAP).
Damaged mass air flow sensor.

Fault symptom[s]

Malfunction indicator lamp lit.

Scheme 39

Ignition off
Check the connectors for the control module, system relay and mass air flow (MAF) sensor. Check the connections visually according to «Inspect terminals visually»(ref-441291-S29438280782011121500000). Check for intermittent contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S00267239222011121500000)
Check the intake system for air leakage according to «intake system/leak test»(ref-441340-S18786781872011121500000)
Remedy as necessary. Other information: To access the engine control module (ECM), see «Engine control module (ECM), replacing»(ref-441335-S25586099582011121500000) To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) For information about signals, see «Signal specification»(ref-441338-S16642011902011121500000) To replace the mass air flow (MAF) sensor, see «Replacing the mass air flow (MAF) sensor»(ref-441341-S07422979692011121500000).

Continue Refer to «Information»(ref-441334-S17734967522011121500000)

See Diagnostic trouble code information

Condition

Diagnostic trouble code (DTC) ECM-15 is stored if the engine coolant temperature (ECT) sensor circuit is short-circuited to ground or voltage or if there is an open-circuit in the circuit.

Substitute Value

The engine coolant temperature (ECT) is calculated theoretically after start
Initial boost pressure
The A/C is switched off
No heated oxygen sensor (HO2S) diagnostics
No idle air trim adaptation
No leak diagnostic.

Possible Source

Signal too high

Short-circuit to supply voltage in the signal cable
Open-circuit in the signal cable or ground lead
Faulty engine coolant temperature (ECT) sensor
Contact resistance and oxidation.

Signal too low

Short-circuit to ground in signal cable
Faulty engine coolant temperature (ECT) sensor.

Fault symptom[s]

Difficult to start
The engine cooling fan (FC) operates constantly
Low idling speed
High idling speed
Malfunction indicator lamp (MIL) lit.

See Diagnostic trouble code (DTC) information

Condition

Scheme 40

Scheme 40: Diagnostic trouble code (DTC) information

Diagnostic trouble code ECM-16 is stored if the heated oxygen sensor (HO2S) signal cable short-circuits to ground / voltage or if there is an open-circuit in the circuit that the control module has interpreted as a fault.

Substitute Value

Fuel trim disabled.

Possible Source

Signal too high

Short-circuit to supply voltage in the signal cable.
Faulty heated oxygen sensor (HO2S).

Signal too low

Short-circuit to ground in the signal cable.
Faulty heated oxygen sensor (HO2S).
Open-circuit in the signal cable.

Fault symptom[s]

None.

Scheme 41

Ignition off
Check the front heated oxygen sensor (HO2S) connector for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S41448420802011121500000). Check the cable between control module terminal #45 and heated oxygen sensor (HO2S) connector terminal #4. Check for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000). Remedy as necessary. Other information To connect the breakout box and access the control module, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) To access or replace the front heated oxygen sensor (HO2S), see «Replace the front heated oxygen sensor (HO2S)»(ref-441339-S30504258732011121500000) For information about signals see «Signal specification»(ref-441338-S16642011902011121500000).

Continue Refer to «Information»(ref-441334-S02129661392011121500000)

See Diagnostic trouble code (DTC) information

See also:
• Checking the turbocharger (TC)
• Contents

Dynamic Stability Assist (Dsa) & Engine Control Module (ECM) Diagnostic Trouble Codes: Diagnosis Volvo V40 I рестайлинг

Diagnostic trouble code (DTC) information

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Fault cause and diagnostic testing for contact resistance and oxidation

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Checking the status of the diagnostic trouble code (DTC)

Checking diagnostic trouble codes (DTCs) in the engine control module (ECM)

Diagnostic trouble code (DTC) stored in the engine control module (ECM)

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Selecting diagnostic trouble code (DTC)

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Diagnostic trouble code information

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More articles — Dynamic Stability Assist (Dsa) & Engine Control Module (ECM) Diagnostic Trouble Codes

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