Diagnostic Trouble Codes
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Diagnostic trouble code (DTC)
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Description
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C0393 (0B)
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Rear axle clutch solenoid valve control circuit (overcurrent)
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C0393 (06)
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Rear axle clutch solenoid valve control circuit (wiring)
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C0394 (06)
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Rear Axle Clutch Solenoid Temperature Sensor Circuit
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C0550 (35)
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Operation of the electronic control controller (ECU), ROM
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C0550 (39)
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Operation of the electronic control controller (ECU), wiring
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C0558 (4B)
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Calibration data not programmed/learned
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C0561 (71)
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Permanent system shutdown, information saved
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C0899 (03)
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Device {single or 1} Low Voltage
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U0100 (00)
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Disruption of communication with the controller of the electronic engine management system
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U0121 (00)
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Disruption of communication with the anti-lock braking system controller (ABS)
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U0140 (00)
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Lost communication with body controller
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DTC C0393 (0B)
Circuit Description
When monitoring the shunt current on the coupling coil in the clutch assembly, it is found that the current conduction exceeds a predetermined value, then the system is permanently disabled.
DTC Descriptions
The following trouble codes are processed in this diagnostic procedure:
- DTC C0393 (0B) Rear axle clutch solenoid valve control circuit (overcurrent)
Conditions for setting the DTC
To write the diagnostic trouble code C0393 to the memory (0B) all of the following conditions must be met:
- The supply voltage is greater than 8 volts, the winding current is greater than 6 volts, and these conditions persist for more than 40 ms.
- The supply voltage is less than 8 volts, the current in the winding is greater than 6 volts.
Action taken when the DTC is set
- DTC C0393 is stored in memory (0B).
- Permanent disabling of the AWD system, the AWD warning lamp is on.
Conditions for clearing the DTC
- If the conditions that caused DTC C0393 to be stored (0B), no longer exist, this DTC can be cleared using the appropriate scan tool.
- A DTC that has not been stored in memory for 100 driving cycles is erased from the history data.
DTC C0393 (0B) - Rear axle clutch solenoid valve control circuit (overcurrent)
| Step | Operation | Values | Yes | No |
| 1 |
Check wiring harness, connector and leads between clutch controller and clutch assembly.
Is there any physical damage found?
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-
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Go to Step 2
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Go to Step 3
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| 2 |
Repair the damage and check the system with the diagnostic tool.
Are any diagnostic codes found?
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-
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Go to Step 3
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System is ok
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| 3 |
Replace clutch assembly. Perform a system calibration and check the system with a scan tool.
Are any diagnostic codes found?
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-
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Go to Step 1
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System OK
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DTC C0393 (06)
Circuit Description
When a Pulse Width Modulation Output Duty Error is Detected (PWM) and shunt current on the coupling coil in the clutch assembly, the system is permanently disabled.
DTC Descriptions
The following trouble codes are processed in this diagnostic procedure:
- DTC C0393 (06) Rear axle clutch solenoid valve control circuit (wiring)
Conditions for setting the DTC
To write the diagnostic trouble code C0393 to the memory (06) all of the following conditions must be met:
- The output duty cycle is greater than 90% and the winding current is less than 0.1A.
- The output duty cycle is less than 10% and the winding current is greater than 3.0A.
- The supply voltage is greater than 8 volts, there is no overcurrent error, and these conditions persist for more than 2 seconds.
Action taken when the DTC is set
- DTC C0393 is stored in memory (06).
- Permanent disabling of the AWD system, the AWD warning lamp is on.
Conditions for clearing the DTC
- If the conditions that caused DTC C0393 to be stored (06), no longer exist, this DTC can be cleared using the appropriate scan tool.
- A DTC that has not been stored in memory for 100 driving cycles is erased from the history data.
DTC C0393 (0B) - Rear axle clutch solenoid valve control circuit (overcurrent)
| Step | Operation | Values | Yes | No |
| 1 |
Check wiring harness, connector and leads between clutch controller and clutch assembly.
Is there any physical damage found?
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-
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Go to Step 2
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Go to Step 3
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| 2 |
Repair the damage and check the system with the diagnostic tool.
Are any diagnostic codes found?
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-
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Go to Step 3
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System is ok
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| 3 |
Replace clutch controller. Perform a system calibration and check the system with a scan tool.
Are any diagnostic codes found?
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Go to Step 1
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System OK
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DTC C0394 (06)
Circuit Description
In the event of an error in the temperature signal of the clutch assembly, a substitute value is used for control (-20 degrees Celsius), and the DTC is stored in memory.
DTC Descriptions
The following trouble codes are processed in this diagnostic procedure:
- DTC C0394 (06) Rear Axle Clutch Solenoid Temperature Sensor Circuit
Conditions for setting the DTC
To write the diagnostic trouble code C0394 to the memory (06) all of the following conditions must be met:
- Clutch temperature sensor voltage is greater than 4.5 volts and persists for more than 10 seconds.
- The clutch temperature sensor voltage is less than 0.015 volts and it persists for more than 10 seconds.
Action taken when the DTC is set
- DTC C0394 is stored in memory (06).
- Permanent disabling of the AWD system, the AWD warning lamp is on.
Conditions for clearing the DTC
- If the conditions that caused DTC C0394 to be stored (06), no longer exist, this DTC can be cleared using the appropriate scan tool.
- A DTC that has not been stored in memory for 100 driving cycles is erased from the history data.
DTC C0394 (06) - Rear axle clutch solenoid temperature sensor circuit
| Step | Operation | Values | Yes | No |
| 1 |
Check wiring harness, connector and pins (pin 4.2 clutch controller) between clutch controller and clutch assembly.
Is there any physical damage found?
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-
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Go to Step 2
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Go to Step 3
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| 2 |
Repair the damage and check the system with the diagnostic tool.
Are any diagnostic codes found?
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-
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Go to Step 3
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System is ok
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| 3 |
Replace clutch assembly. Perform a system calibration and check the system with a scan tool.
Are any diagnostic codes found?
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-
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Go to Step 1
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System OK
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DTC C0550 (35)
Circuit Description
Add all ROM values to check will be result of low byte "A5H".
Process when any of these errors occur: clutch controller (CCM) immediately enters Stop Mode.
DTC Descriptions
The following trouble codes are processed in this diagnostic procedure:
- DTC C0550 (35) Operation of the electronic control controller (ECU), ROM
Conditions for setting the DTC
- CCM controller ROM failure, low byte is not the result "A5H".
Action taken when the DTC is set
- DTC C0550 is stored in memory (35).
- Permanent disabling of the AWD system, the AWD warning lamp is on.
Conditions for clearing the DTC
- If the conditions that caused DTC C0550 to be stored (35), no longer exist, this DTC can be cleared using the appropriate scan tool.
- A DTC that has not been stored in memory for 100 driving cycles is erased from the history data.
DTC C0550 (35) - Functioning of the electronic control controller (ECU), ROM
| Step | Operation | Values | Yes | No |
| 1 |
Check wiring harness, connector and leads between clutch controller and clutch assembly.
Is there any physical damage found?
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-
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Go to Step 2
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Go to Step 3
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| 2 |
Repair the damage and check the system with the diagnostic tool.
Are any diagnostic codes found?
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-
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Go to Step 3
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System is ok
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| 3 |
Replace clutch controller. Perform a system calibration and check the system with a scan tool.
Are any diagnostic codes found?
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-
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Go to Step 1
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System OK
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DTC C0550 (39)
Circuit Description
If the monitoring of the supply voltage before/after the relay close command detects a relay junction welding defect or a relay junction contact defect, the system will permanently shut down.
DTC Descriptions
The following trouble codes are processed in this diagnostic procedure:
- DTC C0550 (39) Operation of the electronic control controller (ECU), wiring
Conditions for setting the DTC
- On initial test, relay output supply voltage to turn off is greater than 9 volts, there is no overcurrent error, and these conditions persist for more than 1 second.
- On initial test, the turn-on relay output supply voltage is greater than 2 volts, there is no overcurrent error, and these conditions persist for more than 5 seconds.
Action taken when the DTC is set
- DTC C0550 is stored in memory (39).
- Permanent disabling of the AWD system, the AWD warning lamp is on.
Conditions for clearing the DTC
- If the conditions that caused DTC C0550 to be stored (39), no longer exist, this DTC can be cleared using the appropriate scan tool.
- A DTC that has not been stored in memory for 100 driving cycles is erased from the history data.
DTC C0550 (39) - Functioning of the electronic control controller (ECU), wiring
| Step | Operation | Values | Yes | No |
| 1 |
Check wiring harness, connector and leads between clutch controller and clutch assembly.
Is there any physical damage found?
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-
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Go to Step 2
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Go to Step 3
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| 2 |
Repair the damage and check the system with the diagnostic tool.
Are any diagnostic codes found?
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-
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Go to Step 3
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System is ok
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| 3 |
Replace clutch controller. Perform a system calibration and check the system with a scan tool.
Are any diagnostic codes found?
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-
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Go to Step 1
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System OK
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DTC C0558 (4B)
Circuit Description
When the ECU has no IT performance adjustment data (current - torque) for each clutch, the maximum torque will be limited.
DTC Descriptions
The following trouble codes are processed in this diagnostic procedure:
- DTC C0558 (4B) Calibration data not programmed/learned
Conditions for setting the DTC
- Clutch Controller Calibration Process (CCM) not done at the factory.
Action taken when the DTC is set
- DTC C0558 is stored in memory (4B).
- Permanent disabling of the AWD system, the AWD warning lamp is on.
Conditions for clearing the DTC
- If the conditions that caused DTC C0558 to be stored (4B), no longer exist, this DTC can be cleared using the appropriate scan tool.
- A DTC that has not been stored in memory for 100 driving cycles is erased from the history data.
DTC C0550 (39) - Functioning of the electronic control controller (ECU), wiring
| Step | Operation | Values | Yes | No |
| 1 |
If the clutch controller is replaced or the clutch assembly is replaced, calibrate the system and check the system with a scan tool.
Are any diagnostic codes found?
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Go to Step 2
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System OK
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| 2 |
Perform the diagnostic procedure corresponding to the DTC.
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DTC C0561 (71)
Circuit Description
In the event of an accelerator signal error, torque control will be performed based on wheel speed signals and a DTC will be stored in memory.
DTC Descriptions
The following trouble codes are processed in this diagnostic procedure:
- DTC C0561 (71) Permanent system shutdown, information saved
Conditions for setting the DTC
- When the ECU controller receives an invalid signal, and this state is maintained for 500ms.
Action taken when the DTC is set
- DTC C0561 is stored in memory (71).
- Temporary shutdown of the AWD system, the AWD warning lamp flashes.
Conditions for clearing the DTC
- If the conditions that caused DTC C0561 to be stored (71), no longer exist, this DTC can be cleared using the appropriate scan tool.
- A DTC that has not been stored in memory for 100 driving cycles is erased from the history data.
DTC C0561 (71) - Permanent shutdown of the system, information is saved
| Step | Operation | Values | Yes | No |
| 1 |
Are any diagnostic codes found?
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-
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Go to Step 2
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System is ok
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| 2 |
Are any diagnostic codes found?
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-
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Go to Step 3
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System is ok
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| 3 |
Replace clutch controller. Perform a system calibration and check the system with a scan tool.
Are any diagnostic codes found?
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-
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Go to Step 1
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System OK
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DTC C0899 (03)
Circuit Description
If, when monitoring the supply voltage after installing the relay, a low battery voltage and a defect in the relay junction contact are detected, then the system is turned off.
DTC Descriptions
The following trouble codes are processed in this diagnostic procedure:
- DTC C0899 (03) Device {single or 1} Low Voltage
Conditions for setting the DTC
- After the system is installed, the turn-on relay output voltage is less than 5 volts, there is no overcurrent error, and these conditions persist for more than 30 seconds.
Action taken when the DTC is set
- DTC C0899 is stored in memory (03).
- Temporary shutdown of the AWD system, the AWD warning lamp flashes.
Conditions for clearing the DTC
- If the conditions that caused DTC C0899 to be stored (03), no longer exist, this DTC can be cleared using the appropriate scan tool.
DTC C0899 (03) - Device {single or 1} Low Voltage
| Step | Operation | Values | Yes | No |
| 1 |
Are any diagnostic codes found?
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-
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Go to Step 2
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System is ok
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| 2 |
Are any diagnostic codes found?
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-
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Go to Step 3
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System is ok
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| 3 |
Are any diagnostic codes found?
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-
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Go to Step 1
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System OK
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DTC U0100 (00)
Circuit Description
If there is no ECM signal, torque control will be performed based on wheel speed signals and a DTC will be stored in memory.
DTC Descriptions
The following trouble codes are processed in this diagnostic procedure:
- DTC U0100 (00) Disruption of communication with the controller of the electronic engine management system (ECM)
Conditions for setting the DTC
- Can't get a signal "Engine speed" after 500 ms.
Action taken when the DTC is set
- DTC U0100 is stored in memory (00).
- Temporary shutdown of the AWD system, the AWD warning lamp flashes.
Conditions for clearing the DTC
- If the conditions that caused DTC U0100 to be stored (00), no longer exist, this DTC can be cleared using the appropriate scan tool.
DTC U0100 (00) - Disruption of communication with the controller of the electronic engine management system (ECM)
| Step | Operation | Values | Yes | No |
| 1 |
Are any diagnostic codes found?
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-
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Go to Step 2
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System is ok
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| 2 |
Are any diagnostic codes found?
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-
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Go to Step 1
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System OK
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DTC U0121 (00)
Circuit Description
In the event of a transfer case clutch request signal error, ABS/VSES control will not be enabled.
DTC Descriptions
The following trouble codes are processed in this diagnostic procedure:
- DTC U0121 (00) Disruption of communication with the anti-lock braking system controller (ABS)
Conditions for setting the DTC
- Can't get a signal "Transfer Case Clutch Request" after 500 ms.
Action taken when the DTC is set
- DTC U0121 is stored in memory (00).
- Temporary shutdown of the AWD system, the AWD warning lamp flashes.
Conditions for clearing the DTC
- If the conditions that caused DTC U0121 to be stored (00), no longer exist, this DTC can be cleared using the appropriate scan tool.
DTC U0121 (00) - Disruption of communication with the controller of the anti-lock braking system (ABS)
| Step | Operation | Values | Yes | No |
| 1 |
Are any diagnostic codes found?
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-
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Go to Step 2
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System is ok
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| 2 |
Are any diagnostic codes found?
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-
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Go to Step 1
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System OK
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DTC U0140 (00)
Circuit Description
If there is no body controller signal (BCM), clutch controller control will not be allowed (CCM).
DTC Descriptions
The following trouble codes are processed in this diagnostic procedure:
- DTC U0140 (00) Lost communication with body controller
Conditions for setting the DTC
- Can't get a signal "System power mode" after 500 ms.
Action taken when the DTC is set
- DTC U0140 is stored in memory (00).
- Temporary shutdown of the AWD system, the AWD warning lamp flashes.
Conditions for clearing the DTC
- If the conditions that caused DTC U0140 to be stored (00), no longer exist, this DTC can be cleared using the appropriate scan tool.
DTC U0140 (00) - Disruption of communication with the body controller
| Step | Operation | Values | Yes | No |
| 1 |
Are any diagnostic codes found?
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-
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Go to Step 2
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System is ok
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| 2 |
Are any diagnostic codes found?
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-
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Go to Step 1
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System OK
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