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Engine Control Module (ECM) Diagnostic Trouble Codes - 13 of 13: Other Volvo XC90 I

Testing & Diagnostics 3 illustrations ~7183 words

FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

REPLACING THE COMPONENT

The engine control module (ECM) has registered an internal fault in the atmospheric pressure sensor in the control module.

If the fault is intermittent, it has been registered previously but no longer remains. Intermittent faults can be due to disruption when the engine control module (ECM) started or can be another type of fault that may recur at different instances. The fault is assessed on a case by case basis. If the fault recurs, replace the engine control module (ECM).

In the event of a permanent fault, replace the engine control module (ECM).

Remedy as necessary.

Other information

  1. see «ENGINE CONTROL MODULE (ECM), REPLACING»(ref-476695-S24530329132012060500000)
  1. Continue Refer to «INFORMATION»(ref-476787-S11877164182012060500000)

FAULT-TRACING INFORMATION

In case of this defect, troubleshooting is not followed by verification.

The information can be displayed again or the fault-tracing for this fault can be interrupted.

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

CHECKING THE STATUS

  1. Ignition on Read the diagnostic status and trouble status for the diagnostic trouble code by selecting the diagnostic trouble code in the list. Check if the malfunction is permanent or intermittent by reading off the diagnostic trouble code's status when the diagnostic status is "Implemented". If the trouble status is "Malfunction found", this indicates that the malfunction is permanent. If the trouble status is "No malfunction found", this indicates that the malfunction is intermittent and not active right now. NOTE: Trouble status cannot go from "Malfunction found" to "No malfunction found" in the same operating cycle.
  1. Continue Refer to «CHECKING COMPONENT AND CABLES»(ref-476787-S16746856412012060500000)

CHECKING COMPONENT AND CABLES

Check the leakage diagnostics unit's connector for contact resistance and oxidation.

Check the cable between engine control module (ECM) #B33 (#C33) and the leakage diagnostics unit #1 for short-circuit to ground, as well as open circuit.

Remedy as necessary.

Other information

  1. see «CONNECTING THE BREAKOUT BOX»(ref-476691-S27857399862012060500000)
  2. see «SIGNAL SPECIFICATION, ENGINE CONTROL MODULE (ECM)»(ref-476694-S30016655152012060500000)
  3. see «LEAK DIAGNOSTIC PUMP, REPLACING»(ref-476751-S30362075082012060500000)
  4. see «CONTENTS»(ref-476689-S17283010372012060500000)

Scheme 451

Scheme 451
Scheme 451
  1. Continue Refer to «VERIFICATION»(ref-476787-S12965582292012060500000)

VERIFICATION

HINT: After carrying out the repair, check that the fault has been remedied.

Scheme 452

Scheme 452
Scheme 452
  1. Ignition off
  2. Reconnect the connectors, components, etc.
  3. Ignition on
  4. Read the diagnostic status and fault status for the diagnostic trouble code by selecting the diagnostic trouble code in the list. Check the fault status for the diagnostic trouble code when the scan is "Implemented". When the function is correct the fault status should be "No fault found" when the scan is implemented.

Is the function OK?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-476787-S11404804142012060500000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

see FAULT-TRACING

see FAULT-TRACING

  1. Ignition on Read the diagnostic status and trouble status for the diagnostic trouble code by selecting the diagnostic trouble code in the list. Check if the malfunction is permanent or intermittent by reading off the diagnostic trouble code's status when the diagnostic status is "Implemented". If the trouble status is "Malfunction found", this indicates that the malfunction is permanent. If the trouble status is "No malfunction found", this indicates that the malfunction is intermittent and not active right now. NOTE: Trouble status cannot go from "Malfunction found" to "No malfunction found" in the same operating cycle.
  1. Continue Refer to «CHECKING COMPONENT AND CABLES»(ref-476787-S32834581662012060500000)

Check the leakage diagnostics unit's connector for contact resistance and oxidation.

Check the cable between engine control module (ECM) #B33 (#C33) and the leakage diagnostics unit #1 for short-circuit to voltage.

Remedy as necessary.

Other information

  1. see «CONNECTING THE BREAKOUT BOX»(ref-476691-S27857399862012060500000)
  2. see «SIGNAL SPECIFICATION, ENGINE CONTROL MODULE (ECM)»(ref-476694-S30016655152012060500000)
  3. see «LEAK DIAGNOSTIC PUMP, REPLACING»(ref-476751-S30362075082012060500000)
  4. see «CONTENTS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476787-S22478983212012060500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reconnect the connectors, components, etc.
  3. Ignition on
  4. Read the diagnostic status and fault status for the diagnostic trouble code by selecting the diagnostic trouble code in the list. Check the fault status for the diagnostic trouble code when the scan is "Implemented". When the function is correct the fault status should be "No fault found" when the scan is implemented.

Is the function OK?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-476787-S13030189302012060500000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

see FAULT-TRACING

see FAULT-TRACING

CHECKING THE TRAFFIC LOAD ON THE CAN CABLES

  1. Connect the central electronic module (CEM) to the breakout box
  2. Connect the battery.
  3. Ignition on. NOTE: When the adapter cable harness and the central electronic module (CEM) have been connected, there is access to both sides of the CAN network (both LS-CAN and HS-CAN). There will also be traffic on both networks. Be careful to check the terminals between which the readings are to be taken so that the intended reading is not taken on the wrong network. Faults in the CAN network may be due to a control module sending faulty messages that disrupt normal communication. When messages are sent incorrectly, this results in a considerable increase in the amount of traffic on the CAN network. Check the load by measuring the average voltage value on the CAN cables in relation to ground. Check as follows: Measure the voltage between C3:48 and ground. The voltage shall be approx. 2.3 V. Measure the voltage between C3:47 and ground. The voltage shall be approx. 2.8 V. Other information see «BATTERY, DISCONNECTING»(ref-476746-S00156360512012060500000)

Is the value OK?

  1. YES Refer to «INFORMATION»(ref-476787-S20680873492012060500000)
  2. NO Refer to «IDENTIFYING A CONTROL MODULE IN THE CAN NETWORK»(ref-476787-S31947101782012060500000)

IDENTIFYING A CONTROL MODULE IN THE CAN NETWORK

If the load on the CAN network is too high, this may be due to a control module sending faulty messages on the CAN network (known as a disruptive control module). The fault may also be due to an intermittent short-circuit to supply voltage or ground in one of the CAN cables. This results in the control modules on the CAN network starting to send faulty messages. The faults can occur without a diagnostic trouble code (DTC) being stored by the control modules. The voltage can be measured between the CAN cables in order to check the load on the CAN network.

  1. Check communication/load on HS-CAN by measuring voltage between C3:48 and C3:47. The voltage's average value shall be approx. 0.5 V (permitted is 0.4 to 0.6 V). In case of communication error, the voltage is approx. 0.7 V and higher.

In order to identify which control module is communicating incorrectly, cut the power supply to one control module at a time. Check the voltage in the CAN cables again. The easiest way to cut the power supply is to remove the fuse(s) for the relevant control module. Continue until the voltage between the CAN cables drops to approximately 0.5 V.

HINT: When the suspected control module has been identified, connect and disconnect the supply voltage to the control module a number of times to verify that the fault appears and disappears. Ignition off between each check.

Note. Do not cut the power to the central electronic module (CEM) unless it is the last control module left to check.

A control module that is communicating incorrectly must be replaced. Remedy as necessary.

Note. Following a fault involving control modules that disrupt communication, other control modules may operate in Limp-Home mode (i. e. they work but with limited functionality) even after switching the ignition off and on a number of times. To remedy this, disconnect and reconnect the battery negative terminal to restore the control modules to normal function.

Note. A faulty control module that disrupts communication can place other control modules in Limp-Home mode (i. e. they work but with limited functionality) even after switching the ignition off and on a number of times. To remedy this, disconnect and reconnect the battery negative terminal to restore the control modules to normal function.

  1. Continue Refer to «VERIFICATION»(ref-476787-S07581085702012060500000)

HINT: Once a fault has been repaired, conduct a verification to check that the fault has been remedied.

  1. Reinstall the connectors, components etc.
  2. Ignition on
  3. Erase diagnostic trouble codes (DTCs) in all control modules
  4. Start the vehicle. Allow the vehicle to run for 10 minutes. Read out the diagnostic trouble codes in the vehicle via the DIAGNOSTICS tab.

Does the diagnostic trouble code (DTC) for faulty communication return?

  1. YES Refer to «INFORMATION»(ref-476787-S08527875422012060500000)
  2. NO OKAY: Troubleshooting has been completed.

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Verification shows that the fault is no longer present. The diagnostic trouble code (DTC) was probably caused by an intermittent fault.

Fault-tracing for this diagnostic trouble code (DTC) is not followed by a verification.

You can view the information again or exit fault-tracing for this diagnostic trouble code (DTC).

see FAULT-TRACING

see FAULT-TRACING INFORMATION

see FAULT-TRACING

see FAULT-TRACING

  1. Ignition on Read the diagnostic status and trouble status for the diagnostic trouble code by selecting the diagnostic trouble code in the list. Check if the malfunction is permanent or intermittent by reading off the diagnostic trouble code's status when the diagnostic status is "Implemented". If the trouble status is "Malfunction found", this indicates that the malfunction is permanent. If the trouble status is "No malfunction found", this indicates that the malfunction is intermittent and not active right now. NOTE: Trouble status cannot go from "Malfunction found" to "No malfunction found" in the same operating cycle.
  1. Continue Refer to «CHECKING COMPONENT AND CABLES»(ref-476787-S19709694832012060500000)

Check the leakage diagnostics unit's connector for contact resistance and oxidation.

Check the cable between engine control module (ECM) #B23 (#C23) and the leakage diagnostics unit #2 for short-circuit to voltage.

Remedy as necessary.

Other information

  1. see «CONNECTING THE BREAKOUT BOX»(ref-476691-S27857399862012060500000)
  2. see «SIGNAL SPECIFICATION, ENGINE CONTROL MODULE (ECM)»(ref-476694-S30016655152012060500000)
  3. see «LEAK DIAGNOSTIC PUMP, REPLACING»(ref-476751-S30362075082012060500000)
  4. see «CONTENTS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476787-S23589629782012060500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reconnect the connectors, components, etc.
  3. Ignition on
  4. Read the diagnostic status and fault status for the diagnostic trouble code by selecting the diagnostic trouble code in the list. Check the fault status for the diagnostic trouble code when the scan is "Implemented". When the function is correct the fault status should be "No fault found" when the scan is implemented.

Is the function OK?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-476787-S25861582472012060500000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

see FAULT-TRACING

see FAULT-TRACING

  1. Ignition on Read the diagnostic status and trouble status for the diagnostic trouble code by selecting the diagnostic trouble code in the list. Check if the malfunction is permanent or intermittent by reading off the diagnostic trouble code's status when the diagnostic status is "Implemented". If the trouble status is "Malfunction found", this indicates that the malfunction is permanent. If the trouble status is "No malfunction found", this indicates that the malfunction is intermittent and not active right now. NOTE: Trouble status cannot go from "Malfunction found" to "No malfunction found" in the same operating cycle.
  1. Continue Refer to «CHECKING COMPONENT AND CABLES»(ref-476787-S17611844122012060500000)

Check the leakage diagnostics unit's connector for contact resistance and oxidation.

Check the cable between engine control module (ECM) #B23 (#C23) and the leakage diagnostics unit #2 for short-circuit to ground, as well as open circuit.

Remedy as necessary.

Other information

  1. see «CONNECTING THE BREAKOUT BOX»(ref-476691-S27857399862012060500000)
  2. see «SIGNAL SPECIFICATION, ENGINE CONTROL MODULE (ECM)»(ref-476694-S30016655152012060500000)
  3. see «LEAK DIAGNOSTIC PUMP, REPLACING»(ref-476751-S30362075082012060500000)
  4. see «CONTENTS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476787-S07806831262012060500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reconnect the connectors, components, etc.
  3. Ignition on
  4. Read the diagnostic status and fault status for the diagnostic trouble code by selecting the diagnostic trouble code in the list. Check the fault status for the diagnostic trouble code when the scan is "Implemented". When the function is correct the fault status should be "No fault found" when the scan is implemented.

Is the function OK?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-476787-S35072012042012060500000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

see FAULT-TRACING

see FAULT-TRACING

  1. Ignition on Check if the malfunction is permanent or intermittent by opening and closing the valve in the leakage diagnostics unit. Listen for a clicking sound when the valve opens/closes. If the valve is not heard, this indicates a permanent malfunction. If the valve can be heard, this indicates that the malfunction is intermittent and not active right now.
  1. Continue Refer to «CHECKING COMPONENT AND CABLES»(ref-476787-S18006914552012060500000)

Check the leakage diagnostics unit's connector for contact resistance and oxidation.

Check the valve's resistance between the leakage diagnostics unit's connector #3 and #4.

Check the cable between engine control module (ECM) #B48 (#C48) and the leakage diagnostics unit #2 for short-circuit to ground, as well as open circuit.

Remedy as necessary.

Other information

  1. see «CONNECTING THE BREAKOUT BOX»(ref-476691-S27857399862012060500000)
  2. see «SIGNAL SPECIFICATION, ENGINE CONTROL MODULE (ECM)»(ref-476694-S30016655152012060500000)
  3. see «LEAK DIAGNOSTIC PUMP, REPLACING»(ref-476751-S30362075082012060500000)
  4. see «CONTENTS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476787-S22348124592012060500000)

HINT: After repairing, it is necessary to check that the malfunction has been fixed.

  1. Ignition off
  2. Reconnect the connectors, components, etc.
  3. Ignition on
  4. Start activation of the valve in the leakage diagnostics unit. Listen for a clicking sound when the valve opens/closes.

Is the function OK?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-476787-S35498646162012060500000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

see FAULT-TRACING

see FAULT-TRACING

  1. Ignition on Check if the malfunction is permanent or intermittent by opening and closing the valve in the leakage diagnostics unit. Listen for a clicking sound when the valve opens/closes. If the valve is not heard, this indicates a permanent malfunction. If the valve can be heard, this indicates that the malfunction is intermittent and not active right now.
  1. Continue Refer to «CHECKING COMPONENT AND CABLES»(ref-476787-S42423482332012060500000)

Check the leakage diagnostics unit's connector for contact resistance and oxidation.

Check the valve's resistance between the leakage diagnostics unit's connector #3 and #4.

Check the cable between engine control module (ECM) #B48 (#C48) and the leakage diagnostics unit #2 for short-circuit to voltage.

Remedy as necessary.

Other information

  1. see «FUEL SYSTEM, DRAINING»(ref-476758-S15266008662012060500000)
  2. see «SIGNAL SPECIFICATION, ENGINE CONTROL MODULE (ECM)»(ref-476694-S30016655152012060500000)
  3. see «LEAK DIAGNOSTIC PUMP, REPLACING»(ref-476751-S30362075082012060500000)
  4. see «CONTENTS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476787-S04027033892012060500000)

HINT: After repairing, it is necessary to check that the malfunction has been fixed.

  1. Ignition off
  2. Reconnect the connectors, components, etc.
  3. Ignition on
  4. Start activation of the valve in the leakage diagnostics unit. Listen for a clicking sound when the valve opens/closes.

Is the function OK?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-476787-S06937870752012060500000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

HINT: After carrying out the repair, check that the fault has been remedied.

Scheme 453

Scheme 453: VERIFICATION
Scheme 453: VERIFICATION
  1. Ignition off
  2. Reconnect the connectors, components, etc.
  3. Start the engine.
  4. Read the diagnostic status and fault status for the diagnostic trouble code by selecting the diagnostic trouble code in the list. Increase the engine speed a few times until the scan is "Implemented". Check the fault status for the diagnostic trouble code when the scan is "Implemented". When the function is correct the fault status should be "No fault found" when the scan is implemented.

Is the function OK?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-476787-S32196203892012060500000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

see FAULT TRACING

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reconnect the connectors, components, etc.
  3. Start the engine.
  4. Read the diagnostic status and fault status for the diagnostic trouble code by selecting the diagnostic trouble code in the list. Increase the engine speed a few times until the scan is "Implemented". Check the fault status for the diagnostic trouble code when the scan is "Implemented". When the function is correct the fault status should be "No fault found" when the scan is implemented.

Is the function OK?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-476787-S26397425652012060500000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reconnect the connectors, components, etc.
  3. Start the engine.
  4. Read the diagnostic status and fault status for the diagnostic trouble code by selecting the diagnostic trouble code in the list. Increase the engine speed a few times until the scan is "Implemented". Check the fault status for the diagnostic trouble code when the scan is "Implemented". When the function is correct the fault status should be "No fault found" when the scan is implemented.

Is the function OK?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-476787-S34320345872012060500000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

see FAULT-TRACING

see FAULT-TRACING

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reconnect the connectors, components, etc.
  3. Start the engine.
  4. Read the diagnostic status and fault status for the diagnostic trouble code by selecting the diagnostic trouble code in the list. Increase the engine speed a few times until the scan is "Implemented". Check the fault status for the diagnostic trouble code when the scan is "Implemented". When the function is correct the fault status should be "No fault found" when the scan is implemented.

Is the function OK?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-476787-S10122104822012060500000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

see FAULT-TRACING

see FAULT-TRACING

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reconnect the connectors, components, etc.
  3. Start the engine.
  4. Read the diagnostic status and fault status for the diagnostic trouble code by selecting the diagnostic trouble code in the list. Increase the engine speed a few times until the scan is "Implemented". Check the fault status for the diagnostic trouble code when the scan is "Implemented". When the function is correct the fault status should be "No fault found" when the scan is implemented.

Is the function OK?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-476787-S19338934332012060500000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING INFORMATION

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

MEASURING CABLES IN CAN-NETWORK (HS-CAN)

  1. Ignition off
  2. Disconnect the minus terminal on the battery.
  3. Connect a breakout box to the Engine Control Module (ECM). NOTE: Also connect the engine control module (ECM) to the adapter cable harness, otherwise the measured values will be incorrect. Measure the resistance between the connections below. Due to the network design, different measurement values will be obtained. For each measurement, twist the cable harness and wiggle the connections, where accessible, to detect any intermittent short-circuits or open circuits. NOTE: The following resistance measurements only measure the main paths in the high-speed network, not the junctions that exist for some control modules. An open circuit in one path cannot be detected by this measurement. However, a short-circuit in a branch can be detected. Measure the resistance between #B58 (#C58) and #B45 (#C45). The resistance shall be approx. 60 ohms. Permitted values approx. 55-65 ohms. Also measure the resistance between each connection and the voltage as well as ground. The resistance must be infinite or very large (more than 1 Mohms). HINT: If a malfunction is detected, then try to separate the junction with the measured malfunction at an appropriate point further along the cable. Unplug any connector/control module nearest to the previous measurement point and measure again. In this manner, try to find the malfunction. Remedy the cables as necessary. Other information see «BATTERY, DISCONNECTING»(ref-476746-S00156360512012060500000) see «CONNECTING THE BREAKOUT BOX»(ref-476691-S27857399862012060500000) see «SIGNAL SPECIFICATION, ENGINE CONTROL MODULE (ECM)»(ref-476694-S30016655152012060500000) see «CONTENTS»(ref-476689-S17283010372012060500000)

Was a malfunction detected?

  1. YES Refer to «VERIFICATION»(ref-476787-S02844848432012060500000)
  2. NO Refer to «CHECKING THE TRAFFIC LOAD ON THE CAN CABLES»(ref-476787-S31239457292012060500000)
  1. Connect the battery
  2. Ignition on Malfunctions in the Control Area Network (CAN) may be due to a control module sending incorrect messages that disrupt normal communication. When messages are sent incorrectly, this results in a considerable increase in the amount of traffic on the Control Area Network (CAN). Check the load by measuring the average voltage value on the network cables in relation to ground. Check in the following manner: Measure the voltage between #B45 (#C45) (HS-CAN-L) and ground. The voltage shall be approx. 2.3 V. Measure the voltage between #B58 (#C58) (HS-CAN-H) and ground. The voltage shall be approx. 2.8 V. Other information see «BATTERY, DISCONNECTING»(ref-476746-S00156360512012060500000)

Is the value OK?

  1. YES Refer to «INFORMATION»(ref-476787-S35131118152012060500000)
  2. NO Refer to «IDENTIFYING A CONTROL MODULE IN THE CAN-NETWORK»(ref-476787-S32042036972012060500000)

If the load on the CAN network is too high, this may be due to a control module sending incorrect messages on the CAN network (known as a disruptive control module). The malfunction may also be due to an intermittent short-circuit to voltage or ground in one of the CAN-cables. This results in the control modules on the CAN-network starting to send incorrect messages. The malfunctions can occur without a diagnostic trouble code (DTC) being stored by the control modules. The voltage can be measured between the CAN-cables in order to check the load on the CAN-network.

Note. It is not necessarily the control module(s) that stored the diagnostic trouble code (DTC) that is communicating incorrectly. Incorrect messages can come from any control module in the same section of the CAN-network. However, incorrect communication in one network cannot affect the communication on the other network. In other words, incorrect communication on the LS-CAN cannot disrupt communication on the HS-CAN, and vice versa.

Check the communication/load on the CAN-network by measuring the voltage between #B45 (#C45) and #B58 (#C58). The average value of the voltage shall be approx. 0.5 V (0.4-0.6 V). In case of malfunctioning communication, the voltage is at approx. 0.7 V and above.

To identify which control module is responsible for the incorrect communication, one can disconnect the voltage feed to each control module in turn and re-check the voltage on the CAN-cables. The voltage feed is most easily disconnected by removing the fuse/fuses for the particular control module. Continue until the voltage between the CAN-cables drops to about 0.5 V.

Note. When connecting and disconnecting individual control modules, other diagnostic trouble codes (DTCs) may be stored in certain control modules.

HINT: When a suspected control module is identified, connect and disconnect the voltage feed several times to verify that the malfunction appears and disappears. Turn off the ignition between each check.

Note. Do not cut the voltage to the central electronic module (CEM) unless it is the last control module left to check.

A control module which communicates incorrectly must be replaced.

Note. Following a malfunction involving control modules that disrupt communication, other control modules may remain in Limp-Home mode (that is, they work but with limited functionality) even after the ignition has been turned off and on a number of times. To remedy this, disconnect and reconnect the battery's minus terminal to restore the control modules to normal function.

  1. Continue Refer to «VERIFICATION»(ref-476787-S02844848432012060500000)
  1. Erase diagnostic trouble codes via vehicle communication service.
  2. Start the engine and let it run for 10 minutes.
  3. Read out diagnostic trouble codes. Check to see if the communication diagnostic trouble code has been stored again.

Did the trouble code(s) return?

  1. YES Refer to «INFORMATION»(ref-476787-S00635132882012060500000)
  2. NO OKAY: Troubleshooting has been completed.

Verification shows that the fault is no longer present. The diagnostic trouble code (DTC) was probably caused by an intermittent fault.

Fault-tracing for this diagnostic trouble code (DTC) is not followed by a verification.

You can view the information again or exit fault-tracing for this diagnostic trouble code (DTC).

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING INFORMATION

see FAULT-TRACING INFORMATION

see FAULT-TRACING

see FAULT-TRACING

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on Activate readout of electronic throttle unit's position. Check that read-off throttle position shows reasonable values at different deployments.

Are these values within their permitted ranges?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-476787-S25721968192012060500000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

see FAULT-TRACING INFORMATION

see FAULT-TRACING INFORMATION

see FAULT-TRACING INFORMATION

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reconnect the connectors, components, etc.
  3. Start the engine.
  4. Read the diagnostic status and fault status for the diagnostic trouble code by selecting the diagnostic trouble code in the list. Increase the engine speed a few times until the scan is "Implemented". Check the fault status for the diagnostic trouble code when the scan is "Implemented". When the function is correct the fault status should be "No fault found" when the scan is implemented.

Is the function OK?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-476787-S12345247402012060500000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

see FAULT-TRACING

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reconnect the connectors, components, etc.
  3. Start the engine.
  4. Read the diagnostic status and fault status for the diagnostic trouble code by selecting the diagnostic trouble code in the list. Increase the engine speed a few times until the scan is "Implemented". Check the fault status for the diagnostic trouble code when the scan is "Implemented". When the function is correct the fault status should be "No fault found" when the scan is implemented.

Is the function OK?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-476787-S28079445332012060500000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING INFORMATION

INFORMATION

The diagnostic trouble code indicates that CAN-communication between engine control module (ECM) and Brake control module (BCM) is missing.

Among others, the code may be caused by

  1. Engine control module (ECM) or Brake control module (BCM) contains no software for this vehicle.
  2. Open circuit on CAN-communication between Brake control module (BCM) and Engine control module (ECM).
  3. Programmed engine control module (ECM) or Brake control module (BCM) has been moved from one vehicle to another.

HINT: Read off the diagnostic trouble codes (DTCs) from the brake control module (BCM).

  1. Continue Refer to «VERIFICATION»(ref-476787-S19013831362012060500000)

HINT: After repairing, it is necessary to check that the malfunction has been fixed.

  1. Ignition off
  2. Reinstall connector, components, etc.
  3. Start the engine.

Did engine start?

  1. YES OKAY: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-476787-S37150776762012060500000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

see FAULT-TRACING

see FAULT-TRACING INFORMATION

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING INFORMATION

The diagnostic trouble code indicates that CAN-communication between engine control module (ECM) and central electronic module (CEM) is missing.

Among others, the code may be caused by

  1. Engine control module (ECM) or central electronic module (CEM) contains no software for this vehicle.
  2. Open circuit in CAN-communication between central electronic module (CEM) and engine control module (ECM)
  3. Programmed engine control module (ECM) or central electronic module (CEM) has been moved from one vehicle to another.

HINT: Read off diagnostic trouble codes in central electronic module (CEM).

  1. Continue Refer to «VERIFICATION»(ref-476787-S29491653742012060500000)

HINT: After repairing, it is necessary to check that the malfunction has been fixed.

  1. Ignition off
  2. Reinstall connector, components, etc.
  3. Start the engine.

Did engine start?

  1. YES OKAY: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-476787-S01570450082012060500000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

see FAULT-TRACING

  1. Ignition on
  2. Wait for 20 seconds. NOTE: This first verification assumes that download of new software was required in the control module that generated the diagnostic trouble code. If download of new software was not required: read out diagnostic trouble codes and check if the code status is permanent or intermittent to learn how difficult it will be to find the fault. Read out the diagnostic trouble codes in the vehicle via the DIAGNOSTICS tab. Check that the diagnostic trouble code (DTC) for faulty communication is not stored again.

Has the fault been remedied?

  1. YES OKAY: Troubleshooting has been completed.
  2. NO Refer to «TAKING READING ON CABLE IN THE CAN NETWORK (HS-CAN)»(ref-476787-S10362655712012060500000)

TAKING READING ON CABLE IN THE CAN NETWORK (HS-CAN)

  1. Ignition off
  2. Disconnect the battery negative lead.
  3. Connect the breakout box with the engine control module (ECM) connected. HINT: Where a breakout box cannot be used, take readings from the rear of the affected connectors if possible. This prevents terminal pins and socket housings being damaged. Take resistance readings across the following terminals. Various readings will be obtained due to the structure of the network. Twist the cable harness and work the connectors at accessible points along the cable harness in order to check whether the resistance changes during each measurement. This method can be used to detect intermittent short-circuits or open-circuits. NOTE: The following resistance readings only measure the main arteries in the high speed network, not the junctions that exist for some control modules. If an open-circuit is suspected in a cable, or a short-circuit is suspected in one of its junctions, the connector at the control module for this junction must be disconnected and the reading taken from there. Take the following readings Measure the resistance between the terminals for HS CAN on the Engine control module (ECM). Resistance must be approximately 60 ohms. Permitted values are approximately 55 - 65 ohms. NOTE: If there is a short-circuit somewhere in the CAN-net the resistance will be 0 ohms. Also measure the resistance between each terminal and supply voltage and ground. The resistance shall be very high. HINT: Any short-circuit detected on the CAN-net may be on the main circuit or on any branching running out to some control modules. If a fault is found, try to disconnect the junction with the fault at a point further forward. Try to locate the fault in this way. Remedy as necessary. Other information see «BATTERY, DISCONNECTING»(ref-476746-S00156360512012060500000) see «CONNECTING THE BREAKOUT BOX»(ref-476691-S30437390172012060500000) see «SIGNAL SPECIFICATION»(ref-476694-S14228516802012060500000) see «CHECKING WIRING AND TERMINALS»(ref-476689-S17655503092012060500000)

Was a fault detected?

  1. YES Refer to «VERIFICATION»(ref-476787-S15164614152012060500000)
  2. NO Refer to «CHECKING THE TRAFFIC LOAD ON THE CAN CABLES»(ref-476787-S08524754202012060500000)
  1. Connect the battery.
  2. Ignition on Faults in the CAN network may be due to a control module sending faulty messages that disrupt normal communication. When messages are sent incorrectly, this results in a considerable increase in the amount of traffic on the CAN network. Check the load by measuring the average voltage value on the CAN cables in relation to ground. Check as follows: Connect a voltmeter between CAN-L and ground. The voltage should be approx: V Connect a voltmeter between CAN-H and ground. The voltage should be approx: V Other information see «BATTERY, DISCONNECTING»(ref-476746-S00156360512012060500000)

Is the value OK?

  1. YES Refer to «INFORMATION»(ref-476787-S01118028562012060500000)
  2. NO Refer to «IDENTIFYING A CONTROL MODULE IN THE CAN NETWORK»(ref-476787-S07455358572012060500000)

If the load on the CAN network is too high, this may be due to a control module sending faulty messages on the CAN network (known as a disruptive control module). The fault may also be due to an intermittent short-circuit to supply voltage or ground in one of the CAN cables. This results in the control modules on the CAN network starting to send faulty messages. The faults can occur without a diagnostic trouble code (DTC) being stored by the control modules. The voltage can be measured between the CAN cables in order to check the load on the CAN network.

Note. It is not necessarily the control module(s) that stored the diagnostic trouble code (DTC) that is communicating faultily. Faulty messages can come from any control module in the same section of the CAN network. However, faulty communication in one network cannot affect the communication on the other network. In other words, faulty communication on the LS-CAN cannot disrupt communication on the HS-CAN and vice versa.

Take the following readings

  1. Connect a voltmeter between the CAN cables. The average value of the voltage must be approximately 0.6-1.4 V. In case of a problem with communication the voltage is considerably higher.
  2. In order to identify which control module has faulty communication, cut the power supply to one control module at a time. Check the voltage in the CAN cables again. The easiest way to cut the power supply is to remove the fuse(s) for the relevant control module. Repeat until the voltage between the CAN wiring drops to the normal level. NOTE: When connecting and disconnecting certain control modules, diagnostic trouble codes (DTCs) may be stored in other control modules.

HINT: When the suspected control module has been identified, connect and disconnect the supply voltage to the control module a number of times to verify that the fault appears and disappears. Ignition off between each check.

Note. Do not cut the power to the central electronic module (CEM) unless it is the last control module left to check.

The control module that is communicating incorrectly must be replaced.

Note. A faulty control module that disrupts communication can place other control modules in Limp-Home mode (i. e. they work but with limited functionality) even after switching the ignition off and on a number of times. To remedy this, disconnect and reconnect the battery negative terminal to restore the control modules to normal function.

Remedy as necessary.

  1. Continue Refer to «VERIFICATION»(ref-476787-S15164614152012060500000)

HINT: Once a fault has been repaired, conduct a verification to check that the fault has been remedied.

  1. Reinstall the connectors, components etc.
  2. Ignition on
  3. Erase diagnostic trouble codes (DTCs) in all control modules
  4. Start the vehicle. Allow the vehicle to run for 10 minutes. Read out the diagnostic trouble codes in the vehicle via the DIAGNOSTICS tab.

Is the diagnostic trouble code for configuration fault regenerated?

  1. YES Refer to «INFORMATION»(ref-476787-S30696731302012060500000)
  2. NO OKAY: Troubleshooting has been completed.

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Verification shows that the fault is no longer present. The diagnostic trouble code (DTC) was probably caused by an intermittent fault.

Fault-tracing for this diagnostic trouble code (DTC) is not followed by a verification.

You can view the information again or exit fault-tracing for this diagnostic trouble code (DTC).

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

No troubleshooting has been developed for this diagnostic trouble code. The trouble code for this malfunction is first generated in the central electronic module (CEM) and then in the engine control module (ECM). This diagnostic trouble code cannot be erased until the trouble code in the central electronic module (CEM) has been remedied and erased.

For this reason, first read off the diagnostic trouble codes in the central electronic module (CEM) and then perform troubleshooting and take appropriate action. After that, this diagnostic trouble code can be erased.

No troubleshooting has been developed for this diagnostic trouble code. Diagnostic trouble code for this malfunction is first generated in the steering wheel module (SWM) then in the engine control module (ECM). This diagnostic trouble code cannot be erased until the diagnostic trouble code in the steering wheel module (SWM) is erased and remedied.

Therefore, first read off the diagnostic trouble codes in the steering wheel module (SWM), perform troubleshooting and take appropriate action. Then this diagnostic trouble code can be erased.

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

The diagnostic trouble code indicates that the immobilizer codes do not match between Engine control module (ECM) and Brake control module (BCM). The diagnostic trouble code is also generated if CAN-communication between engine control module (ECM) and Brake control module (BCM) is missing.

Among others, the code may be caused by

  1. Engine control module (ECM) is not programmed or has incorrect code for immobilizer, that is, the code does not match the code stored in Brake control module (BCM).
  2. Brake control module (BCM) is not programmed or has incorrect code for immobilizer, that is, the code does not match the code stored in Engine control module (ECM).
  3. Open circuit on CAN-communication between Brake control module (BCM) and Engine control module (ECM).
  4. Programmed engine control module (ECM) or Brake control module (BCM) has been moved from one vehicle to another.

HINT: Read out diagnostic trouble codes in brake control module (BCM).

  1. Continue Refer to «VERIFICATION»(ref-476787-S02007629222012060500000)

HINT: After repairing, it is necessary to check that the malfunction has been fixed.

  1. Ignition off
  2. Reinstall connector, components, etc.
  3. Start the engine.

Did engine start?

  1. YES OKAY: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-476787-S13480359842012060500000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

see FAULT-TRACING

No troubleshooting has been developed for this diagnostic trouble code (DTC). Diagnostic trouble code (DTC) for this malfunction is first stored in the brake control module (BCM), then in the engine control module (ECM). This diagnostic trouble code (DTC) cannot be erased before the diagnostic trouble code (DTC) in the brake control module (BCM) has been erased and remedied.

Therefore, first read off the diagnostic trouble codes in the brake control module (BCM), perform troubleshooting and take appropriate action. Then this diagnostic trouble code can be erased.

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING INFORMATION

The diagnostic trouble code indicates that the immobilizer codes do not match between the engine control module (ECM) and central electronic module (CEM). The code is also generated if CAN-communication between engine control module (ECM) and central electronic module (CEM) is missing.

Among others, the code may be caused by

  1. Engine control module (ECM) is not programmed or has incorrect code for immobilizer, that is, the code does not match the code stored in central electronic module (CEM).
  2. Central electronic module (CEM) is not programmed or has incorrect code for immobilizer, that is, the code does not match the code stored in engine control module (ECM).
  3. Open circuit in CAN-communication between central electronic module (CEM) and engine control module (ECM)
  4. Programmed engine control module (ECM) or central electronic module (CEM) has been moved from one vehicle to another.

HINT: Read off diagnostic trouble codes in central electronic module (CEM).

  1. Continue Refer to «VERIFICATION»(ref-476787-S15479802912012060500000)

HINT: After repairing, it is necessary to check that the malfunction has been fixed.

  1. Ignition off
  2. Reinstall connector, components, etc.
  3. Start the engine.

Did engine start?

  1. YES OKAY: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-476787-S16033468832012060500000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

see FAULT-TRACING

The diagnostic trouble code indicates that the immobilizer codes do not match between the engine control module (ECM) and central electronic module (CEM). The code is also generated if CAN-communication between engine control module (ECM) and central electronic module (CEM) is missing.

Among others, the code may be caused by

  1. Engine control module (ECM) is not programmed or has incorrect code for immobilizer, that is, the code does not match the code stored in central electronic module (CEM).
  2. Central electronic module (CEM) is not programmed or has incorrect code for immobilizer, that is, the code does not match the code stored in engine control module (ECM).
  3. Open circuit in CAN-communication between central electronic module (CEM) and engine control module (ECM)
  4. Programmed engine control module (ECM) or central electronic module (CEM) has been moved from one vehicle to another.

HINT: Read off diagnostic trouble codes in central electronic module (CEM).

  1. Continue Refer to «VERIFICATION»(ref-476787-S23226816142012060500000)

HINT: After repairing, it is necessary to check that the malfunction has been fixed.

  1. Ignition off
  2. Reinstall connector, components, etc.
  3. Start the engine.

Did engine start?

  1. YES OKAY: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-476787-S06438064882012060500000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

No fault-tracing has been developed for this diagnostic trouble code (DTC).

The diagnostic trouble code (DTC) for this fault is first stored in the Central electronic module (CEM) or in the Forward Sensing Module (FSM), then in the Engine control module (ECM). This diagnostic trouble code (DTC) can first be erased when the root fault has been remedied and the diagnostic trouble code (DTC) for the root fault has been erased.

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

see FAULT-TRACING

CHECKING THE BATTERY AND CONNECTIONS

Check the battery.

Check the battery terminals and the engine control module (ECM) connector. Check for contact resistance, play and oxidation.

  1. Continue Refer to «REPLACING THE COMPONENT»(ref-476787-S12625649122012060500000)

The engine control module (ECM) has registered an internal fault.

If the fault is intermittent, it has been registered previously but is no longer present. Intermittent faults may be due to interference at start or may be a different type of fault that occurs on different occasions. The fault is evaluated depending on how it occurs.

Ensure that the software in the Engine control module (ECM) is correct by downloading it again.

If the fault recurs, replace the control module.

In the event of a permanent fault, replace the control module.

Remedy as necessary.

Other information

  1. see «ENGINE CONTROL MODULE (ECM)»(ref-476695-S30933262542012060500000)
  1. Continue Refer to «INFORMATION»(ref-476787-S00000427352012060500000)

In case of this defect, troubleshooting is not followed by verification.

The information can be displayed again or the fault-tracing for this fault can be interrupted.

More articles — Engine Control Module (ECM) Diagnostic Trouble Codes - 13 of 13