DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-830B
Condition
Scheme 187
The engine control module (ECM) transmits and receives information via a standardized serial communication method - LIN (Local Interconnect Network).
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects interference in communication with the alternator control module (ACM).
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
- The alternator control module (ACM) (charge regulator) charges at a fixed voltage of 13.8 V.
Possible Source
- Contact resistance and oxidation in the terminals
- Short-circuit between the LIN wiring
- Open-circuit in the LIN wiring
- Internal fault in another control module in the same part of the LIN network
- Damaged alternator control module (ACM) (charge regulator)
- A generator (GEN) and alternator control module (ACM) (charge regulator) are installed which are not suitable for LIN communication.
Fault symptom[s]
- The "Generator not charging" warning lamp is lit when the engine is running.
see DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-830B
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-830C
Condition
The engine control module (ECM) uses CAN communication to communicate with the central electronic module (CEM).
A diagnostic trouble code (DTC) is stored in the engine control module (ECM) if the central electronic module (CEM) detects over voltage in the power supply system.
This diagnostic trouble code (DTC) is always stored along with another diagnostic trouble code (DTC) for the power supply system.
The diagnostic trouble code (DTC) can be diagnosed when the engine is running.
Substitute Value
- None.
Possible Source
- A battery charger with too high charge voltage has been connected previously
- Damaged alternator control module (ACM).
Fault symptom[s]
- The electrolyte in battery boils with the engine running
- The headlamp bulb blows.
Scheme 188
Scheme 189
- Start the engine
- Read off the battery voltage and the target value of the generator (GEN) charge voltage
- Load the battery by switching on high current consumers such as high beam and the blower fan etc. Check that the battery voltage is approximately 13.5 -14.9 V. Check that the battery voltage is approximately the same as the target value for the generator (GEN) voltage. Try different engine speeds (RPM). The fault is permanent if the function is incorrect. If the voltage is correct, this is an indication that the fault was present previously but is not active at the moment, i. e. an intermittent fault. HINT: This diagnostic trouble code can be stored if a battery charger with too high charge voltage has been connected.
- Continue Refer to «CHECKING THE COMPONENT»(ref-466671-S40605682292012052300000)
Scheme 190
- Ignition off. Check the generator (GEN) brushes (carbon). If the brushes are worn, replace the alternator control module (ACM). Check that the brushes can move in the regulator housing. The brushes are lightly sprung. At the same time, check the slip rings. Replace the generator (GEN) if they are worn out. If the carbon brushes and slip rings appear to be OK, try a new alternator control module (ACM) (charge regulator). If this does not help, try a new generator (GEN). HINT: Another test to check the alternator's function is to perform Quicktest of alternator function. Found in VIDA vehicle communication under Central electronic module (CEM). Remedy as necessary. Other information: see «CONTENTS»(/volvo/v50/i-2007-2012/remont/body-electrical/#electrical-general-diagnostics-and-tests__contents)
- Continue Refer to «VERIFICATION»(ref-466671-S29914686362012052300000)
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-830C
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-830D
Condition
The engine control module (ECM) uses LIN communication to communicate with the alternator control module (ACM).
The diagnostic trouble code (DTC) is stored if the alternator control module (ACM) transmits information to the engine control module (ECM) about an electrical fault in the generator (GEN).
The diagnostic trouble code (DTC) can be diagnosed when the engine is running.
Substitute Value
- None.
Possible Source
- A battery charger with too high charge voltage has been connected previously
- Worn brushes (carbon)
- Damaged alternator control module (ACM)
- Damaged generator (GEN).
Fault symptom[s]
- The "Generator not charging" warning lamp is lit when the engine is running
- The battery discharges
- Low rotation speed in the starter motor
- The electrolyte in battery boils with the engine running
- The headlamp bulb blows.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-830D
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-8400
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects that the 5 volt supply circuit for sensors has a voltage higher than 6 V (high signal) or lower than 4 V (low signal) and it is interpreted as a fault.
Substitute Value
- None.
Possible Source
Signal too high
- Short-circuit to battery voltage in the 5 volt supply cable
- Damaged sensor connected to the 5 volt supply cable.
Signal too low
- short-circuit to ground in the 5 volt supply cable
- Damaged sensor connected to the 5 volt supply cable.
Fault symptom[s]
- Deterioration in performance
- Uneven idle.
Scheme 191
Scheme 192
- Ignition on. Check whether the fault is permanent or intermittent. Read off the 5 volt power supply from the engine control module (ECM). The value must be higher than 4 volts and lower than 6 volts. The fault is permanent if the value is incorrect. The fault is intermittent if the value is correct.
- Continue Refer to «CHECKING THE COMPONENTS AND WIRING»(ref-466671-S42610359702012042500000)
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-8400
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-8410
Condition
Engine control module (ECM) checks the signal for engine speed at start. If the Engine control module (ECM) detects that the engine speed is lower than a certain value for a certain time, (depending on the temperature), the control module interprets this as a malfunction and the diagnostic trouble code is generated.
The diagnostic trouble code (DTC) can be diagnosed when starting the engine.
Substitute Value
- None.
Possible Source
- Blocked engine (the engine does not turn over)
- Signal interference.
- Damaged engine speed (RPM) sensor.
Fault symptom[s]
- Engine fails to start
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-8410
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-841B
Condition
Engine control module (ECM) checks the voltage feed at start. If the Engine control module (ECM) detects that the voltage feed is lower than a certain value, during a certain time, the control module interprets this as a malfunction and the diagnostic trouble code is generated.
The diagnostic trouble code (DTC) can be diagnosed when starting the engine.
Substitute Value
- None.
Possible Source
- Battery voltage too low.
- Contact resistance or oxidation in the terminals.
Fault symptom[s]
- Engine fails to start
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-841B
Scheme 193
Scheme 194
- Ignition off.
- Check the connectors. Check for loose connections. Check for contact resistance. Check for oxidation. Check the signal cable. Check for a short-circuit to supply voltage. Take readings between: Engine Control Module (ECM) #B9 (#C9) and starter motor relay #2. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(/volvo/v50/i-2007-2012/remont/testing-diagnostics/#engine-control-module-ecm-electricalsignal-specifications) see «CONTENTS»(/volvo/v50/i-2007-2012/remont/body-electrical/#electrical-general-diagnostics-and-tests__contents)
- Continue Refer to «INFORMATION»(ref-466671-S17937399872012042500000)
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-842C
Condition
Engine Control Module (ECM) checks the starter motor relay. If Engine Control Module (ECM) registers that the starter motor relay's signal cable has a voltage that is higher than a certain limit value for a certain time, this is interpreted as a malfunction and the diagnostic trouble code (DTC) is generated.
The diagnostic trouble code (DTC) can be diagnosed when starting the engine.
Substitute Value
- Only manual start possible.
Possible Source
- Short-circuit to supply voltage in the signal cable.
- Damaged starter motor relay.
- Damaged control module.
Fault symptom[s]
- Engine fails to start
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-842C
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-842D
Condition
Engine Control Module (ECM) checks the starter motor relay. If Engine Control Module (ECM) registers that the starter motor relay's signal cable has a voltage that is lower than a certain limit value for a certain time, this is interpreted as a malfunction and the diagnostic trouble code (DTC) is generated.
The diagnostic trouble code (DTC) can be diagnosed when starting the engine.
Substitute Value
- Only manual start possible.
Possible Source
- Short-circuit to ground in the signal cable.
- Open-circuit in the signal cable.
- Damaged starter motor relay.
- Open-circuit in the voltage supply to the starter motor.
- Damaged control module.
Fault symptom[s]
Engine fails to start
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-842D
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-843B
Condition
The engine control module (ECM) checks the signal from the starter motor relay via the ground cable.
The diagnostic trouble code (DTC) is stored if the control module detects that
- No or faulty signal.
The control module's test for the diagnostic trouble code (DTC) starts in the event of
- After start.
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
- None.
Possible Source
- Open circuit on the ground cable between the engine control module (ECM) and starter relay.
- Internal fault in the stater relay.
Fault symptom[s]
- Starter motor does not operate
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-843B
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-843C
Condition
Engine Control Module (ECM) checks the starter motor relay. If Engine Control Module (ECM) registers that the starter motor relay's signal cable has a voltage that is higher than a certain limit value for a certain time, this is interpreted as a malfunction and the diagnostic trouble code (DTC) is generated.
The diagnostic trouble code (DTC) can be diagnosed when starting the engine.
Substitute Value
- Only manual start possible.
Possible Source
- Short-circuit to supply voltage in the signal cable.
- Damaged starter motor relay.
- Damaged control module.
Fault symptom[s]
- Engine fails to start
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-843C
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-843D
Condition
Engine Control Module (ECM) checks the starter motor relay. If Engine Control Module (ECM) registers that the starter motor relay's signal cable has a voltage that is lower than a certain limit value for a certain time, this is interpreted as a malfunction and the diagnostic trouble code (DTC) is generated.
The diagnostic trouble code (DTC) can be diagnosed when starting the engine.
Substitute Value
- Only manual start possible.
Possible Source
- Short-circuit to ground in the signal cable.
- Open-circuit in the signal cable.
- Damaged starter motor relay.
- Open-circuit in the voltage supply to the starter motor.
- Damaged control module.
Fault symptom[s]
Engine fails to start
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-843D
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION
Condition
The engine control module (ECM) checks the internal circuits for the 5 volt supply to the components.
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that the voltage in one of the circuits is too high, too low or missing.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
- None.
Possible Source
- Short-circuit to ground in the voltage cable.
- Voltage cable for sensor short-circuited to voltage.
- Damaged sensor.
- Damaged engine control module (ECM).
Fault symptom[s]
- Deterioration in performance
- The starter motor does not turn
- The starter motor turns but the engine does not start
- The engine misfires
- The engine is difficult to start.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9000
Condition
Scheme 195
The engine control module (ECM) checks that the signal from the brake pedal position sensor and the signal from the stop lamp switch are reliable. The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers a fault in the circuit for the brake pedal position sensor, the circuit for the stop lamp switch or in the CAN communication between the brake control module (BCM) and the engine control module (ECM), when the engine is running.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is on and the brake pedal is depressed.
Substitute Value
Cruise control switched off.
Possible Source
- Fault trace the brake control module (BCM) and the central electronic module (CEM)
- Contact resistance or oxidation in the terminals between the engine control module (ECM) and the stop lamp switch
- Open-circuit in the power supply to the stop lamp switch
- Open-circuit or short-circuit to ground or supply voltage in the cable for the stop lamp switch
- Incorrectly installed stop lamp switch
- Damaged stop lamp switch.
Fault symptom[s]
- Cruise control does not function at all.
CHECKING THE DIAGNOSTIC TROUBLE CODES (DTCS)
Check whether any diagnostic trouble codes (DTCs) are stored in the brake control module (BCM) or in the central electronic module (CEM).
Any diagnostic trouble codes (DTCs) stored in the brake control module (BCM) or central electronic module (CEM) must be remedied first.
Have fault causes been traced or remedied in the brake control module (BCM) or central electronic module (CEM)?
- YES Refer to «CHECKING THE STATUS»(ref-466671-S19227067632012042500000)
- NO OKAY: Troubleshooting has been completed.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9000
Check whether any diagnostic trouble codes (DTCs) are stored in the brake control module (BCM) or in the central electronic module (CEM).
Any diagnostic trouble codes (DTCs) stored in the brake control module (BCM) or central electronic module (CEM) must be remedied first.
Have fault causes been traced or remedied in the brake control module (BCM) or central electronic module (CEM)?
- YES Refer to «CHECKING THE STATUS»(ref-466671-S21019613652012042500000)
- NO OKAY: Troubleshooting has been completed.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9000
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-900C
Condition
The engine control module (ECM) checks that the signal from the brake pedal position sensor and the signal from the stop lamp switch are reliable. The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers a fault in the circuit for the brake pedal position sensor, the circuit for the stop lamp switch or in the CAN communication between the brake control module (BCM) and the engine control module (ECM), when the engine is running.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is on and the brake pedal is depressed.
Substitute Value
Cruise control switched off.
Possible Source
- Fault trace the brake control module (BCM) and the central electronic module (CEM).
Fault symptom[s]
- Cruise control does not function at all.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-900C
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers an internal fault.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
- Various internal signals in the engine control module (ECM) are replaced with default values
- The cruise control is disengaged when the fault is active
- The electronic throttle unit follows the pulse width modulation (PWM) accelerator pedal signal directly.
Possible Source
- Poorly charged battery or corroded connecting cables
- Damaged engine control module (ECM).
Fault symptom[s]
- The engine misfires
- Cruise control does not function at all.
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-900D
Condition
The engine control module (ECM) checks that the signal from the brake pedal position sensor and the signal from the stop lamp switch are reliable. The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers a fault in the circuit for the brake pedal position sensor, the circuit for the stop lamp switch or in the CAN communication between the brake control module (BCM) and the engine control module (ECM), when the engine is running.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is on and the brake pedal is depressed.
Substitute Value
Cruise control switched off.
Possible Source
- Fault trace the brake control module (BCM) and the central electronic module (CEM).
Fault symptom[s]
- Cruise control does not function at all.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-900D
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-900E
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers an internal malfunction.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
- The cruise control is disengaged when the malfunction is active
- The electronic throttle unit follows the pulse width modulation (PWM) accelerator pedal signal directly.
Possible Source
- Software problem.
- Poorly charged battery or corroded connecting cables
- Damaged engine control module (ECM).
Fault symptom[s]
- Malfunction indicator light (MIL) on.
- The engine misfires
- Cruise control does not function at all.
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9011
Condition
Scheme 196
If the engine control module (ECM) registers that the signal it receives from the brake pedal sensor on the controller area network (CAN) via the brake control module (BCM) is faulty. The diagnostic trouble code (DTC) is also stored if there is a fault in the CAN communication.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
Cruise control switched off.
Possible Source
- Fault trace the brake control module (BCM).
Fault symptom[s]
- Cruise control does not function at all.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9011
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-901B
Condition
If the engine control module (ECM) registers that the signal it receives from the brake pedal sensor on the controller area network (CAN) via the brake control module (BCM) is faulty. The diagnostic trouble code (DTC) is also stored if there is a fault in the CAN communication.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
Cruise control switched off.
Possible Source
- Fault trace the brake control module (BCM).
Fault symptom[s]
- Cruise control does not function at all.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-901B
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-901D
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that the brake pedal position sensor signal, sent via the controller area network (CAN) from the brake control module (BCM) to the engine control module (ECM), is incorrect or that there is a fault in the CAN communication.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
Cruise control switched off.
Possible Source
- Fault trace the brake control module (BCM).
Fault symptom[s]
- Cruise control does not function at all.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-901D
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-902C
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers an internal fault when the cruise control is active.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
- The cruise control is disengaged when the fault is active.
Possible Source
- Damaged engine control module (ECM).
Fault symptom[s]
- Cruise control does not function at all.
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9100
Condition
The engine control module (ECM) receives a signal from the clutch pedal switch via a direct connection. The engine control module also receives information on clutch pedal position from the central electronic module (CEM) via the CAN network. The central electronic module receives this information from the clutch pedal sensor. The control module compares both the signals.
The diagnostic trouble code (DTC) is stored if the control module detects that
- The signals do not correspond with each other.
The control module's test for the diagnostic trouble code (DTC) starts in the event of
- Ignition on.
Note. The diagnostic trouble code can also be generated i the clutch pedal sensor is damaged.
Substitute Value
Cruise control switched off.
Possible Source
- Damaged clutch pedal switch.
- Damaged cable harness.
- Damaged clutch position sensor.
Fault symptom[s]
- Autostart; No Functionality
- Cruise control does not function at all.
- Message in information display
Check whether the diagnostic codes for clutch pedal sensor (9110, 911B, 911C or 911D) are stored in the engine control module (ECM).
If the diagnostic trouble code is stored, it indicates a fault in the clutch pedal sensor. This, in turn, could cause generation of the diagnostic trouble code. If so, perform all troubleshooting acc. to these diagnostic trouble codes first.
Do you want to continue with the procedure?
- YES Refer to «CHECKING THE COMPONENT, WIRING AND CONNECTORS»(ref-466671-S29950580042012042500000)
- NO FAULT NOT FOUND: Troubleshooting has been completed.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9100
Condition
Scheme 197
If Central electronic module (CEM) receives an error message via CAN-net from Central electronic module (CEM) that indicates a faulty signal from the clutch pedal sensor or malfunction of CAN-communication, the diagnostic trouble code is generated.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
Cruise control switched off.
Possible Source
- Fault-trace the central electronic module (CEM).
Fault symptom[s]
- Cruise control does not function at all.
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-910C
Condition
The engine control module (ECM) receives a signal from the clutch pedal switch via a direct connection. When the clutch pedal is pressed down, the clutch pedal switch closes and thus grounds an input on the Engine control module (ECM). The engine control module also receives information on clutch pedal position from the central electronic module (CEM) via the CAN network. The central electronic module receives this information from the clutch pedal sensor.
The diagnostic trouble code (DTC) is stored if the control module detects that
- The CAN signal from the central electronic module (CEM) indicates that the clutch pedal is not depressed, but the input on the engine control module (ECM) is grounded.
The diagnostic trouble code (DTC) can be diagnosed when
- Engine on and vehicle speed over 2 km/h.
Substitute Value
- Cruise control switched off.
- Only manual start possible.
Possible Source
- Open-circuit or short-circuit to supply voltage in the signal cable.
Fault symptom[s]
- Autostart; No Functionality
- Cruise control does not function at all.
- Message in information display
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-910C
Condition
If Central electronic module (CEM) receives an error message via CAN-net from Central electronic module (CEM) that indicates a faulty signal from the clutch pedal sensor or malfunction of CAN-communication, the diagnostic trouble code is generated.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
Cruise control switched off.
Possible Source
- Fault-trace the central electronic module (CEM).
Fault symptom[s]
- Cruise control does not function at all.
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-910D
Condition
The engine control module (ECM) receives a signal from the clutch pedal switch via a direct connection. When the clutch pedal is pressed down, the clutch pedal switch closes and thus grounds an input on the Engine control module (ECM). The engine control module also receives information on clutch pedal position from the central electronic module (CEM) via the CAN network. The central electronic module receives this information from the clutch pedal sensor.
The diagnostic trouble code (DTC) is stored if the control module detects that
- The CAN signal from the central electronic module (CEM) indicates that the clutch pedal is depressed, but that the clutch pedal switch has not closed and grounded the input on the engine control module (ECM).
The diagnostic trouble code (DTC) can be diagnosed when
- Engine on and vehicle speed over 2 km/h.
Substitute Value
- Cruise control switched off.
- Only manual start possible.
Possible Source
- Damaged clutch pedal switch.
- The signal cable is short-circuited to ground.
Fault symptom[s]
- Autostart; No Functionality
- Cruise control does not function at all.
- Message in information display
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-910D
Condition
If Central electronic module (CEM) receives an error message via CAN-net from Central electronic module (CEM) that indicates a faulty signal from the clutch pedal sensor or malfunction of CAN-communication, the diagnostic trouble code is generated.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
Cruise control switched off.
Possible Source
- Fault-trace the central electronic module (CEM).
Fault symptom[s]
- Cruise control does not function at all.
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9110
Condition
Scheme 198
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) receives a fault message from the central electronic module (CEM), via the controller area network (CAN), indicating a faulty signal from the clutch pedal position sensor or a fault in the CAN communication.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
Cruise control switched off.
Possible Source
- Fault-trace the central electronic module (CEM).
Fault symptom[s]
- Cruise control does not function at all.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9110
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-911B
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) receives a fault message from the central electronic module (CEM), via the controller area network (CAN), indicating a faulty signal from the clutch pedal position sensor or a fault in the CAN communication.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
Cruise control switched off.
Possible Source
- Fault-trace the central electronic module (CEM).
Fault symptom[s]
- Cruise control does not function at all.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-911B
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-911C
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) receives a fault message from the central electronic module (CEM), via the controller area network (CAN), indicating a faulty signal from the clutch pedal position sensor or a fault in the CAN communication.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
Cruise control switched off.
Possible Source
- Fault-trace the central electronic module (CEM).
Fault symptom[s]
- Cruise control does not function at all.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-911C
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-911D
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) receives a fault message from the central electronic module (CEM), via the controller area network (CAN), indicating a faulty signal from the clutch pedal position sensor or a fault in the CAN communication.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
Cruise control switched off.
Possible Source
- Fault-trace the central electronic module (CEM).
Fault symptom[s]
- Cruise control does not function at all.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-911D
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-914C
Condition
Scheme 199
The engine control module (ECM) checks the signals from position sensor in the throttle unit. The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers a fault in the signals from the position sensors in the throttle unit.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
- In the event of a detected fault in one of the signals the other signal is used
- The cruise control is disengaged when the fault is active.
Possible Source
Signal too high
- Contact resistance or oxidation in the terminals
- Short-circuit to voltage in the signal cables
- Short-circuit to battery voltage in the power supply
- Open-circuit in the ground lead
- Short-circuit to supply voltage in the ground lead
- Damaged throttle unit.
Signal too low
- Contact resistance or oxidation in the terminals
- Short-circuit to ground in the signal cables
- Open-circuit in the signal cables
- Short-circuit to ground in the power supply
- Open-circuit in the power supply
- Damaged throttle unit.
Faulty signal
- Contact resistance or oxidation in the terminals
- Damaged throttle unit.
Fault symptom[s]
- Deterioration in performance
- Cruise control does not function at all.
Scheme 200
- Ignition off
- Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation. Check the signal cable (position sensor 1) between engine control module (ECM) terminal #A96 (#B36) and throttle unit terminal #6 (wiring side). Check for an open-circuit. Check the signal cable (position sensor 2) between engine control module (ECM) terminal #A72 (#B12) and throttle unit terminal #4 (cable harness side). Check for an open-circuit. HINT: With the ignition on, the power supply to the throttle unit position sensor must be approximately 5 V measured between throttle unit connector terminals #3 and #5 (wiring side). If no faults are found and the diagnostic trouble code (DTC) recurs, try replacing the throttle unit. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(/volvo/v50/i-2007-2012/remont/testing-diagnostics/#engine-control-module-ecm-electricalsignal-specifications) see «THROTTLE BODY»(ref-466651-S01198376532012042500000) see «CHECKING WIRING AND TERMINALS»(/volvo/v50/i-2007-2012/remont/body-electrical/#electrical-general-diagnostics-and-tests)
- Continue Refer to «VERIFICATION»(ref-466671-S37338112452012042500000)
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-914C
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-914C
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-91AC
Condition
The engine control module (ECM) checks that the throttle follows the requested throttle angle from the engine control module (ECM). The diagnostic trouble code (DTC) is stored if a fault related to the engine or control of the engine in the throttle unit is detected.
The diagnostic trouble code (DTC) can be diagnosed when the car has been test-driven in various driving conditions.
Substitute Value
- The cruise control is disengaged when the fault is active
- The supply to the throttle unit is switched off, causing the throttle disc to turn to the return position.
Possible Source
Throttle jammed
- The throttle is sticking or is blocked (e. g. dirt, icing, etc.)
- Damaged throttle unit.
Faulty signal
- The throttle is sticking or is blocked (e. g. oil film, dust, icing)
- Damaged throttle unit
- Damaged engine control module (ECM).
Current too high
- Short-circuit to supply voltage or ground in the wiring for the throttle unit
- Open-circuit in the wiring for the throttle unit
- Damaged throttle unit
- Damaged engine control module (ECM).
Fault symptom[s]
- Deterioration in performance
- Uneven idle.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-91AC
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-91AC
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9200
Condition
The steering wheel module (SWM) checks the signals from the buttons on the cruise control. The diagnostic trouble code (DTC) is stored in the engine control module (ECM) if the steering wheel module (SWM) registers a fault in one of the signals from the cruise control buttons or if one of the buttons has been pressed in for too long.
The diagnostic trouble code (DTC) can be diagnosed when the engine is idling.
Substitute Value
- The cruise control is disengaged when the fault is active.
Possible Source
- Fault trace the steering wheel module (SWM).
Fault symptom[s]
- Cruise control does not function at all.
Condition
Scheme 201
This diagnostic trouble code (DTC) is never stored on its own. This diagnostic trouble code (DTC) will also be stored if the engine control module (ECM) registers that one of the diagnostic trouble codes (DTCs) for the throttle position sensor circuit is stored.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
None.
Possible Source
- Fault in the throttle position (TP) sensor circuit for the electronic throttle unit.
Fault symptom[s]
- Malfunction indicator lamp (MIL) lit.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9200
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9210
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers a fault in the signal from the throttle position (TP) sensor, potentiometer 1 (circuit 1) in the electronic throttle unit.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
The throttle angle is calculated using potentiometer 2 (circuit 2) in the throttle position (TP) sensor for the throttle unit. If the diagnostic trouble codes (DTCs) for both potentiometers 1 and 2 are stored at the same time, the supply to the damper motor in the throttle unit will be disabled. The throttle will set itself to the return position.
Possible Source
- Contact resistance or oxidation in the terminals between the engine control module (ECM) and the electronic throttle unit
- The signal cables are short-circuited to each other
- Damaged throttle unit.
Fault symptom[s]
- Poor performance.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9210
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-921C
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers a fault in the signal from the throttle position (TP) sensor, potentiometer 1 (circuit 1) in the electronic throttle unit.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
The throttle angle is calculated using potentiometer 2 (circuit 2) in the throttle position (TP) sensor for the throttle unit. If the diagnostic trouble codes (DTCs) for both potentiometers 1 and 2 are stored at the same time, the supply to the damper motor in the throttle unit will be disabled. The throttle will set itself to the return position.
Possible Source
- Contact resistance or oxidation in the terminals between the engine control module (ECM) and the electronic throttle unit
- Open-circuit or short-circuit to supply voltage in the signal cable
- Open-circuit in the signal ground cable for potentiometers 1 and 2
- Damaged throttle unit.
Fault symptom[s]
- Poor performance.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-921C
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-921C
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-921D
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers a fault in the signal from the throttle position (TP) sensor, potentiometer 1 (circuit 1) in the electronic throttle unit.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
The throttle angle is calculated using potentiometer 2 (circuit 2) in the throttle position (TP) sensor for the throttle unit. If the diagnostic trouble codes (DTCs) for both potentiometers 1 and 2 are stored at the same time, the supply to the damper motor in the throttle unit will be disabled. The throttle will set itself to the return position.
Possible Source
- Contact resistance or oxidation in the terminals between the engine control module (ECM) and the electronic throttle unit
- Short-circuit to ground in the signal cable
- Open-circuit or short-circuit to ground in the power supply to potentiometers 1 and 2
- Damaged throttle unit.
Fault symptom[s]
- Poor performance.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-921D
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9220
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers a fault in the signal from the throttle position (TP) sensor, potentiometer 2 (circuit 2) in the electronic throttle unit.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
The throttle angle is calculated using potentiometer 1 (circuit 1) in the throttle position (TP) sensor for the throttle unit. If the diagnostic trouble codes (DTCs) for both potentiometers 1 and 2 are stored at the same time, the supply to the damper motor in the throttle unit will be disabled. The throttle will set itself to the return position.
Possible Source
- Contact resistance or oxidation in the terminals between the engine control module (ECM) and the electronic throttle unit
- The signal cables are short-circuited to each other
- Damaged throttle unit.
Fault symptom[s]
- Poor performance.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9220
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-922C
Condition
The engine control module (ECM) checks the CAN communication to the steering wheel module (SWM). The diagnostic trouble code (DTC) is stored in the engine control module (ECM) if it receives an incorrect check sum or if the update bit from the steering wheel module (SWM) is missing.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
- The cruise control is disengaged when the fault is active.
Possible Source
- Open-circuit in the control area network (CAN) wiring
- Short-circuit between the control area network (CAN) wiring
- Internal fault in the engine control module (ECM)
- Internal fault in another control module in the same part of the control area network (CAN).
Fault symptom[s]
- Cruise control does not function at all.
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers a fault in the signal from the throttle position (TP) sensor, potentiometer 2 (circuit 2) in the electronic throttle unit.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
The throttle angle is calculated using potentiometer 1 (circuit 1) in the throttle position (TP) sensor for the throttle unit. If the diagnostic trouble codes (DTCs) for both potentiometers 1 and 2 are stored at the same time, the supply to the damper motor in the throttle unit will be disabled. The throttle will set itself to the return position.
Possible Source
- Contact resistance or oxidation in the terminals between the engine control module (ECM) and the electronic throttle unit
- Short-circuit to supply voltage in the signal cable
- Open-circuit in the signal ground cable for potentiometers 1 and 2
- Damaged throttle unit.
Fault symptom[s]
- Poor performance.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-922C
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-922C
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-922D
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers a fault in the signal from the throttle position (TP) sensor, potentiometer 2 (circuit 2) in the electronic throttle unit.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
The throttle angle is calculated using potentiometer 1 (circuit 1) in the throttle position (TP) sensor for the throttle unit. If a fault is also detected in potentiometer 1 (circuit 1) a diagnostic trouble code (DTC) will also be stored for this. If diagnostic trouble codes (DTCs) have been stored for both potentiometers, the supply to the damper motor for the electronic throttle unit will be disabled. The throttle will set itself to the return position.
Possible Source
- Contact resistance or oxidation in the terminals between the engine control module (ECM) and the electronic throttle unit
- Open-circuit or short-circuit to ground in the signal cable
- Open-circuit or short-circuit to ground in the power supply to potentiometers 1 and 2
- Damaged throttle unit.
Fault symptom[s]
- Poor performance.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-922D
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9240
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers an internal fault or a fault in the circuit for the throttle unit damper motor.
The diagnostic trouble code (DTC) can be diagnosed when the engine is running.
Substitute Value
The engine control module (ECM) shuts down the supply to the damper motor for the electronic throttle unit. The throttle will set itself to the return position.
Possible Source
- Contact resistance or oxidation in the terminals between the engine control module (ECM) and the electronic throttle unit
- Open-circuit, short-circuit to ground or short-circuit to supply voltage in the wiring for the damper motor in the throttle unit
- Short-circuit to each other in the wiring for the damper motor in the throttle unit
- Damaged throttle unit
- Damaged engine control module (ECM).
Fault symptom[s]
- Malfunction indicator lamp (MIL) lit
- Deterioration in performance
- Uneven idle.
- Ignition on
- Read off diagnostic trouble codes (DTCs). Check if any diagnostic trouble codes (DTCs) are stored for the electronic throttle unit or the throttle position (TP) sensor. If any of these diagnostic trouble codes (DTCs) are stored, these must be remedied first.
Are any of the above diagnostic trouble codes (DTCs) stored?
- YES Refer to «FAULT-TRACING INFORMATION»(ref-466671-S12772596922012042500000)
- NO Refer to «CHECKING COMPONENTS AND WIRING»(ref-466671-S39957189872012042500000)
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9240
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-925C
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that the movements of the throttle is impeded, or that the return spring in the throttle unit is not functioning correctly, when attempting to adapt the electronic throttle unit.
Substitute Value
Depending on the fault, the engine control module (ECM) can cut off the supply to the damper motor in the electronic throttle unit. The throttle will then attempt to set itself to the return position.
Possible Source
- The throttle is sticking or is blocked (e. g. oil film, dust)
- Contact resistance or oxidation in the terminals between the engine control module (ECM) and the electronic throttle unit
- Open-circuit, short-circuit to ground or short-circuit to supply voltage in the wiring for the damper motor in the throttle unit
- Short-circuit to each other in the wiring for the damper motor in the throttle unit
- Damaged throttle unit.
Fault symptom[s]
- Malfunction indicator lamp (MIL) lit
- Poor performance.
- Ignition on
- Read off diagnostic trouble codes (DTCs). Check if any diagnostic trouble codes (DTCs) are stored for the electronic throttle unit, throttle position (TP) sensor or engine control module (ECM). If any of these diagnostic trouble codes (DTCs) are stored, these must be remedied first.
Are any of the above diagnostic trouble codes (DTCs) stored?
- YES Refer to «FAULT-TRACING INFORMATION»(ref-466671-S38328335482012042500000)
- NO Refer to «CHECKING COMPONENTS AND WIRING»(ref-466671-S04959844642012042500000)
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-925C
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-925D
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that the movements of the throttle is impeded, or that the return spring in the throttle unit is not functioning correctly, when attempting to adapt the electronic throttle unit.
Substitute Value
Depending on the fault, the engine control module (ECM) can cut off the supply to the damper motor in the electronic throttle unit. The throttle will then attempt to set itself to the return position.
Possible Source
- The throttle is sticking or is blocked (e. g. oil film, dust)
- Contact resistance or oxidation in the terminals between the engine control module (ECM) and the electronic throttle unit
- Open-circuit, short-circuit to ground or short-circuit to supply voltage in the wiring for the damper motor in the throttle unit
- Short-circuit to each other in the wiring for the damper motor in the throttle unit
- Damaged throttle unit.
Fault symptom[s]
- Malfunction indicator lamp (MIL) lit
- Poor performance.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-925D
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-926C
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM), when attempting to adapt the throttle unit, registers that the movements of the throttle is impeded or that the opening spring in the electronic throttle unit is not functioning correctly.
Substitute Value
Depending on the fault, the engine control module (ECM) can cut off the supply to the damper motor in the electronic throttle unit. The throttle will then attempt to set itself to the return position.
Possible Source
- The throttle is sticking or is blocked (e. g. oil film, dust)
- Contact resistance or oxidation in the terminals between the engine control module (ECM) and the electronic throttle unit
- Open-circuit, short-circuit to ground or short-circuit to supply voltage in the wiring for the damper motor in the throttle unit
- Short-circuit to each other in the wiring for the damper motor in the throttle unit
- Damaged throttle unit.
Fault symptom[s]
- Malfunction indicator lamp (MIL) lit
- Poor performance.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-926C
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-926D
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM), when attempting to adapt the throttle unit, registers that the movements of the throttle is impeded or that the opening spring in the electronic throttle unit is not functioning correctly.
Substitute Value
Depending on the fault, the engine control module (ECM) can cut off the supply to the damper motor in the electronic throttle unit. The throttle will then attempt to set itself to the return position.
Possible Source
- The throttle is sticking or is blocked (e. g. oil film, dust)
- Contact resistance or oxidation in the terminals between the engine control module (ECM) and the electronic throttle unit
- Open-circuit, short-circuit to ground or short-circuit to supply voltage in the wiring for the damper motor in the throttle unit
- Short-circuit to each other in the wiring for the damper motor in the throttle unit
- Damaged throttle unit.
Fault symptom[s]
- Malfunction indicator lamp (MIL) lit
- Poor performance.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-926D
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9270
Condition
The diagnostic trouble code (DTC) is stored if, when the engine is running, the engine control module (ECM) registers that the desired throttle angle (desired value) does not correspond to the actual throttle angle (actual value) in the electronic throttle unit.
The diagnostic trouble code (DTC) can be diagnosed when the engine is running.
Substitute Value
The engine control module (ECM) shuts down the supply to the damper motor for the electronic throttle unit. The throttle will set itself to the return position.
Possible Source
- The throttle is sticking or is blocked (e. g. oil film, dust)
- Contact resistance or oxidation in the terminals between the engine control module (ECM) and the electronic throttle unit
- Open-circuit, short-circuit to ground or short-circuit to supply voltage in the wiring for the damper motor in the throttle unit
- Short-circuit to each other in the wiring for the damper motor in the throttle unit
- Damaged throttle unit.
Fault symptom[s]
- Malfunction indicator lamp (MIL) lit
- Poor performance.
- Ignition on
- Read off diagnostic trouble codes (DTCs). Check if any diagnostic trouble codes (DTCs) are stored for the electronic throttle unit, throttle position (TP) sensor or engine control module (ECM). If any of these diagnostic trouble codes (DTCs) are stored, these must be remedied first.
Are any of the above diagnostic trouble codes (DTCs) stored?
- YES Refer to «FAULT-TRACING INFORMATION»(ref-466671-S07686617302012042500000)
- NO Refer to «CHECKING COMPONENTS AND WIRING»(ref-466671-S03172052272012042500000)
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9270
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9280
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that the throttle angle at the return limit position is outside the programmed parameter when trying to adapt the throttle unit.
Substitute Value
None.
Possible Source
- The throttle is sticking or is blocked (e. g. oil film, dust)
- Contact resistance or oxidation in the terminals between the engine control module (ECM) and the electronic throttle unit
- Damaged throttle unit.
Fault symptom[s]
- Driving/Poor performance/lacks power
- Idling/Uneven idle
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9280
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-929C
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that the internal governor for control of the throttle angle in the throttle unit is damaged or that the control signal for the governor is too low when controlling the throttle.
The diagnostic trouble code (DTC) can be diagnosed when the engine is running.
Substitute Value
The engine control module (ECM) shuts down the supply to the damper motor for the electronic throttle unit. Throttle will set itself in the return position, or reversible fuel shut-off will take place.
Possible Source
- The throttle is sticking or is blocked (e. g. oil film, dust)
- Contact resistance or oxidation in the terminals between the engine control module (ECM) and the electronic throttle unit
- Open-circuit, short-circuit to ground or short-circuit to supply voltage in the wiring for the damper motor in the throttle unit
- Short-circuit to each other in the wiring for the damper motor in the throttle unit
- Damaged throttle unit
- Faulty software in the engine control module (ECM).
Fault symptom[s]
- Malfunction indicator lamp (MIL) lit
- Poor performance.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-929C
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-929D
Condition
Scheme 202
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that the internal governor for control of the throttle angle in the throttle unit is damaged or that the control signal for the governor is too low when controlling the throttle.
The diagnostic trouble code (DTC) can be diagnosed when the engine is running.
Substitute Value
The engine control module (ECM) shuts down the supply to the damper motor for the electronic throttle unit. Throttle will set itself in the return position, or reversible fuel shut-off will take place.
Possible Source
- The throttle is sticking or is blocked (e. g. oil film, dust)
- Contact resistance or oxidation in the terminals between the engine control module (ECM) and the electronic throttle unit
- Open-circuit, short-circuit to ground or short-circuit to supply voltage in the wiring for the damper motor in the throttle unit
- Short-circuit to each other in the wiring for the damper motor in the throttle unit
- Damaged throttle unit
- Faulty software in the engine control module (ECM).
Fault symptom[s]
- Malfunction indicator lamp (MIL) lit
- Poor performance.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-929D
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-92B0
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) fails to carry out its first adaptation of the electronic throttle unit. This is because the programmed parameter for the stop position in the throttle position (TP) sensor has been exceeded. This adaptation is normally run during manufacture of the vehicle. However the electronic throttle unit must be adapted again if the software, the engine control module (ECM) or the throttle unit is replaced. If other diagnostic trouble codes (DTCs) are stored, these must be remedied first. These may have caused the adaptation to fail.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
- The engine control module (ECM) uses nominal values for the throttle unit parameters
- The engine control module (ECM) shuts down the supply to the damper motor for the electronic throttle unit. The throttle will set itself to the return position
- The engine control module (ECM) uses reversible fuel shut-off.
Possible Source
- The throttle is sticking or is blocked (e. g. oil film, dust)
- Contact resistance or oxidation in the terminals between the engine control module (ECM) and the electronic throttle unit
- Damaged throttle unit.
Fault symptom[s]
- Malfunction indicator lamp (MIL) lit
- Deterioration in performance
- Uneven idle.
- Ignition on. Read off diagnostic trouble codes (DTCs). Check to, see if any other diagnostic trouble codes (DTCs) are stored. If other diagnostic trouble codes (DTCs) are stored, the engine control module (ECM) may not be able to run the adaptation.
Are any other diagnostic trouble codes (DTCs) stored?
- YES Refer to «FAULT-TRACING INFORMATION»(ref-466671-S29845919572012042500000)
- NO Refer to «CHECKING THE STATUS»(ref-466671-S15774345542012042500000)
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-92B0
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-92CC
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects that the basic conditions for adaptation are not met when trying to adapt the electronic throttle unit. If other diagnostic trouble codes (DTCs) are stored, these must be remedied first. These may have caused the adaptation to fail.
Substitute Value
- Adaptation is cancelled.
The following only takes place if a new engine control module (ECM) has been installed in a car that has never previously adapted the electronic throttle unit
- The engine control module (ECM) shuts down the supply to the damper motor for the electronic throttle unit. The throttle will set itself to the return position
- The engine control module (ECM) uses reversible fuel shut-off.
Possible Source
Adaptation of the throttle unit is cancelled because one of the following basic requirements has not been met
- Ignition on / engine off
- The battery voltage must be over 10 V
- Accelerator pedal (AP) unaffected
- The vehicle must be stationary (no vehicle speed signal)
- Engine coolant temperature (ECT) between 5-100 °C
- Intake air temperature (IAT) above 5 °C.
- The throttle is sticking or is blocked (e. g. oil film, dust)
- Contact resistance or oxidation in the terminals between the engine control module (ECM) and the electronic throttle unit
- Damaged throttle unit.
Fault symptom[s]
- Poor performance.
- Ignition on. Read off diagnostic trouble codes (DTCs). Check to, see if any other diagnostic trouble codes (DTCs) are stored. If other diagnostic trouble codes (DTCs) are stored, the engine control module (ECM) may not be able to run the adaptation.
Are any other diagnostic trouble codes (DTCs) stored?
- YES Refer to «FAULT-TRACING INFORMATION»(ref-466671-S01792103012012042500000)
- NO Refer to «CHECKING THE STATUS»(ref-466671-S21358493952012042500000)
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-92CC
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-92CD
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects that the basic conditions for adaptation are not met when trying to adapt the electronic throttle unit. If other diagnostic trouble codes (DTCs) are stored, these must be remedied first. These may have caused the adaptation to fail.
Substitute Value
- Adaptation is cancelled.
The following only takes place if a new engine control module (ECM) has been installed in a car that has never previously adapted the electronic throttle unit
- The engine control module (ECM) shuts down the supply to the damper motor for the electronic throttle unit. The throttle will set itself to the return position
- The engine control module (ECM) uses reversible fuel shut-off.
Possible Source
Adaptation of the throttle unit is cancelled because one of the following basic requirements has not been met
- Ignition on / engine off
- The battery voltage must be over 10 V
- Accelerator pedal (AP) unaffected
- The vehicle must be stationary (no vehicle speed signal)
- Engine coolant temperature (ECT) between 5-100 °C
- Intake air temperature (IAT) above 5 °C.
- The throttle is sticking or is blocked (e. g. oil film, dust)
- Contact resistance or oxidation in the terminals between the engine control module (ECM) and the electronic throttle unit
- Damaged throttle unit.
Fault symptom[s]
- Poor performance.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-92CD
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-92D0
Condition
The diagnostic trouble code (DTC) is stored if the ignition has been left on for 30 seconds and the engine control module (ECM) has been unable to adapt the electronic throttle unit. This is because the programmed parameter for the stop position in the throttle position (TP) sensor has been exceeded. Adaptation is usually carried out to ensure that the throttle unit parameters are within the programmed values that are stored in the engine control module (ECM). If other diagnostic trouble codes (DTCs) are stored, these must be remedied first. These may have caused the adaptation to fail.
Substitute Value
The engine control module (ECM) uses parameters from previous successful adaptations.
Possible Source
- The throttle is sticking or is blocked (e. g. oil film, dust)
- Contact resistance or oxidation in the terminals between the engine control module (ECM) and the electronic throttle unit
- Damaged throttle unit.
Fault symptom[s]
- None.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-92D0
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-92E0
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM), when attempting to adapt the electronic throttle unit, registers an internal fault in the integrated amplifier for the signal from potentiometer 1 in throttle position sensor (circuit 1) in the electronic throttle unit.
Substitute Value
The engine control module (ECM) does not use the signal from potentiometer 1 for the throttle position (TP) sensor (circuit 1) in the electronic throttle unit.
Possible Source
- Damaged engine control module (ECM).
Fault symptom[s]
- None.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-92E0
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9300
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers a fault in the CAN communication or a fault in one of the following control modules: steering wheel module (SWM), central electronic module (CEM), brake control module (BCM) or transmission control module (TCM).
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
Cruise control switched off.
Possible Source
- Open-circuit in the control area network (CAN) wiring
- Short-circuit between the control area network (CAN) wiring
- Internal fault in the engine control module (ECM)
- Internal fault in another control module in the same part of the control area network (CAN).
Fault symptom[s]
- Cruise control does not function at all.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9300
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-930B
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers a fault in the CAN communication or a fault in one of the following control modules: steering wheel module (SWM), central electronic module (CEM), brake control module (BCM) or transmission control module (TCM).
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
Cruise control switched off.
Possible Source
- Open-circuit in the control area network (CAN) wiring
- Short-circuit between the control area network (CAN) wiring
- Internal fault in the engine control module (ECM)
- Internal fault in another control module in the same part of the control area network (CAN).
Fault symptom[s]
- Cruise control does not function at all.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-930B
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-930C
Condition
The engine control module (ECM) checks the signal from the clutch pedal sensor. The engine control module (ECM) receives the clutch pedal sensor signal that is sent via the CAN network from the central electronic module (CEM). The diagnostic trouble code (DTC) is stored in the engine control module (ECM) if the clutch pedal sensor signal is missing or incorrect.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
- The cruise control is disengaged when the fault is active.
Possible Source
Signal too high
- Fault trace the central electronic module (CEM).
Signal too low
- Fault trace the central electronic module (CEM).
Faulty signal
- Fault trace the central electronic module (CEM).
Signal missing
- Fault trace the central electronic module (CEM).
Diagnostic trouble code (DTC) in the central electronic module (CEM)
- Fault trace the central electronic module (CEM).
Fault symptom[s]
- Cruise control does not function at all.
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers a fault in the CAN communication or a fault in one of the following control modules: steering wheel module (SWM), central electronic module (CEM), brake control module (BCM) or transmission control module (TCM).
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
Cruise control switched off.
Possible Source
- Open-circuit in the control area network (CAN) wiring
- Short-circuit between the control area network (CAN) wiring
- Internal fault in the engine control module (ECM)
- Internal fault in another control module in the same part of the control area network (CAN).
Fault symptom[s]
- Cruise control does not function at all.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-930C
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-930D
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers a fault in the CAN communication or a fault in one of the following control modules: steering wheel module (SWM), central electronic module (CEM), brake control module (BCM) or transmission control module (TCM).
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
Cruise control switched off.
Possible Source
- Open-circuit in the control area network (CAN) wiring
- Short-circuit between the control area network (CAN) wiring
- Internal fault in the engine control module (ECM)
- Internal fault in another control module in the same part of the control area network (CAN).
Fault symptom[s]
- Cruise control does not function at all.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-930D
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-931C
Condition
The engine control module (ECM) receives a signal from the clutch pedal switch via a direct connection. The engine control module also receives information on clutch pedal position from the central electronic module (CEM) via the CAN network. The central electronic module receives this information from the clutch pedal sensor. The control module compares both the signals.
The diagnostic trouble code (DTC) is stored if the control module detects that
- The signals do not correspond with each other.
The control module's test for the diagnostic trouble code (DTC) starts in the event of
- Ignition on.
Note. The diagnostic trouble code can also be generated i the clutch pedal sensor is damaged.
Substitute Value
- None.
Possible Source
- Damaged clutch pedal switch.
- Damaged cable harness.
- Damaged clutch position sensor.
Fault symptom[s]
- Autostart; No Functionality
Check whether diagnostic trouble code ECM-930C is stored in the engine control module (ECM).
If the diagnostic trouble code is stored, it indicates a fault in the clutch pedal sensor. This, in turn, could cause generation of the diagnostic trouble code. If so, perform all troubleshooting acc. to ECM-930C first.
Do you want to continue with the procedure?
- YES Refer to «CHECKING THE COMPONENT, WIRING AND CONNECTORS»(ref-466671-S41026941972012042500000)
- NO FAULT NOT FOUND: Troubleshooting has been completed.
Scheme 203
Scheme 204
- Ignition on. Check the status of the clutch pedal switch by starting the readout, depressing the clutch pedal to its end position and checking whether the status changes. NOTE: Read-out only works on vehicles built after week 46 2007. Check the clutch pedal switch's cable and function by measuring between Engine control module (ECM) #B15 (#C15) and ground (frame connection). Remedy as necessary. Other information: see «CONTENTS»(/volvo/v50/i-2007-2012/remont/body-electrical/#electrical-general-diagnostics-and-tests__contents) see «SIGNAL SPECIFICATION»(/volvo/v50/i-2007-2012/remont/testing-diagnostics/#engine-control-module-ecm-electricalsignal-specifications)
- Continue Refer to «VERIFICATION»(ref-466671-S26515087892012042500000)
Check whether diagnostic trouble code ECM-930C is stored in the engine control module (ECM).
If the diagnostic trouble code is stored, it indicates a fault in the clutch pedal sensor. This, in turn, could cause generation of the diagnostic trouble code. If so, perform all troubleshooting acc. to ECM-930C first.
Do you want to continue with the procedure?
- YES Refer to «CHECKING THE COMPONENT, WIRING AND CONNECTORS»(ref-466671-S04098357752012042500000)
- NO FAULT NOT FOUND: Troubleshooting has been completed.
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9400
Condition
Scheme 205
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that there is a fault in the PWM signal from the accelerator pedal (AP) position sensor, or that the difference between the analog signal and the PWM signal from the accelerator pedal (AP) position sensor to the engine control module (ECM) is too great.
The diagnostic trouble code (DTC) can be diagnosed when the engine is running.
Substitute Value
The accelerator pedal (AP) does not function while the brake pedal is pressed.
Possible Source
- Contact resistance or oxidation in the terminals between the accelerator pedal (AP) position sensor and the engine control module (ECM)
- Damaged accelerator pedal (AP) position sensor.
Fault symptom[s]
- Poor accelerator pedal (AP) response
- Cruise control does not function at all.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-9400
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-940C
Condition
Scheme 206
The engine control module (ECM) receives information on brake pedal position via the CAN network. The status of the brake pedal position sensor is obtained from the brake control module (BCM). The status of the brake pedal switch is obtained from the central electronic module (CEM). The control module compares both the signals.
The diagnostic trouble code (DTC) is stored if the control module detects that
- Information with invalid data has been received from the Brake control module (BCM).
- Quality factor too low
- The signal is outside its normal range.
The control module's test for the diagnostic trouble code (DTC) starts in the event of
- Ignition on.
Substitute Value
- Cruise control is disengaged when the fault is active.
Possible Source
- Damaged brake pedal sensor.
- Damaged brake control module (BCM).
- Fault in the control area network (CAN).
Fault symptom[s]
- Autostart; No Functionality
- Cruise control does not operate
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that there is a fault in the PWM signal from the accelerator pedal (AP) position sensor, or that the difference between the analog signal and the PWM signal from the accelerator pedal (AP) position sensor to the engine control module (ECM) is too great.
The diagnostic trouble code (DTC) can be diagnosed when the engine is running.
Substitute Value
The accelerator pedal (AP) does not function while the brake pedal is pressed.
Possible Source
- Short-circuit to supply voltage in the signal cable between the accelerator pedal (AP) position sensor and the engine control module (ECM)
- Damaged accelerator pedal (AP) position sensor.
Fault symptom[s]
- Poor accelerator pedal (AP) response
- Cruise control does not function at all.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-940C
Condition
The diagnostic trouble code (DTC) (missing signal) is stored if the engine control module (ECM) cannot communicate with the brake control module (BCM) on the CAN network. The diagnostic trouble code (DTC) (faulty signal) is stored in the engine control module (ECM) if the brake control module (BCM) receives a faulty signal from the brake pedal position sensor.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
- The cruise control is disengaged when the fault is active.
Possible Source
Faulty signal
- Fault trace the brake control module (BCM)
- Damaged brake pedal position sensor
- Damaged brake control module (BCM).
Signal missing
- Fault in the CAN communication between the engine control module (ECM) and the brake control module (BCM).
Fault symptom[s]
- Cruise control does not function at all.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-940C
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-940D
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that there is a fault in the PWM signal from the accelerator pedal (AP) position sensor, or that the difference between the analog signal and the PWM signal from the accelerator pedal (AP) position sensor to the engine control module (ECM) is too great.
The diagnostic trouble code (DTC) can be diagnosed when the engine is running.
Substitute Value
The accelerator pedal (AP) does not function while the brake pedal is pressed.
Possible Source
- Contact resistance or oxidation in the terminals between the accelerator pedal (AP) position sensor and the engine control module (ECM)
- Open-circuit in the power supply (12 V) for the accelerator pedal (AP) position sensor
- Open-circuit or short-circuit to ground in the signal cable between the accelerator pedal (AP) position sensor and the engine control module (ECM)
- Damaged accelerator pedal (AP) position sensor.
Fault symptom[s]
- Poor accelerator pedal (AP) response
- Cruise control does not function at all.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-940D
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-941C
Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) receives a fault message from the central electronic module (CEM), via the CAN network, indicating that the analog signal from the accelerator pedal (AP) position sensor is faulty.
The diagnostic trouble code (DTC) can be diagnosed when the engine is running.
Substitute Value
The accelerator pedal (AP) does not function when the brake pedal is pressed.
Possible Source
- Fault-trace the central electronic module (CEM).
Fault symptom[s]
- Poor accelerator pedal (AP) response
- Cruise control does not function at all.
See DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION ECM-941C
Condition
The engine control module (ECM) compares the signal from the stop lamp switch using the signal for the brake pedal position sensor if these are within their permitted range. The engine control module (ECM) receives the brake pedal position sensor signal that is sent via the CAN network from the brake control module (BCM). The diagnostic trouble code (DTC) is stored in the engine control module (ECM) if the stop lamp switch signal is incorrect, outside its permitted range or does not correspond to the signal for the brake pedal position sensor.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is on and the brake pedal is depressed.
Substitute Value
- The cruise control is disengaged when the fault is active.
Possible Source
- Contact resistance or oxidation in the terminals for the stop lamp switch or the brake pedal position sensor
- Open-circuit or short-circuit to ground in the wiring for the stop lamp switch
- Damaged stop lamp switch
- Damaged brake pedal position sensor.
Fault symptom[s]
- Cruise control does not function at all.