Various Fault Codes Logged In Power Electronics Control Unit (LI08.30-P-057146)
Publication date: 2015-09-09Reference number: LI08.30-P-057146
VARIOUS FAULT CODES LOGGED IN POWER ELECTRONICS CONTROL UNIT
TECHNICAL SERVICE BULLETIN
| MERCEDES-BENZ: | MODEL 212.095/195 with ENGINE 276.9 (E400 Hybrid) up to 12/2014; MODEL 212.098/298 with ENGINE 651.9 (E300 Hybrid) up to 12/2014; MODEL 222.057/157 with ENGINE 276.9 (S400 Hybrid) up to 02/2015; MODEL 222.004/104 with ENGINE 651.9 (S300 Hybrid) up to 02/2015 |
| VERSION: | 7 |
| FUNCTION GROUP: | 08.30 Hybrid drive system |
| REASON FOR CHANGE: | Software already available |
COMPLAINT
The READY indicator in the multifunction display remains permanently yellow and does not change to green.
The display message "The hybrid system has a malfunction." appears in the multifunction display.
All hybrid functions (e.g. boost, regenerative braking and electric drive mode) are unavailable.
The following faults may be logged in the power electronics control unit (electric motor control unit, N129/1):
* P0AFB00 The voltage supply of the high-voltage on-board electrical system is too high.
* P1B9000 The current draw from the on-board electrical system or the current supply to the on-board electrical system
is too high.
* P0A9400 The control unit 'DC/DC converter' has a malfunction. _
* P0A4600 Electrical machine B position sensor has a malfunction
* P160600 The control unit has a malfunction due to redundant monitoring.
* P0A3D00 Electrical machine B power inverter has overtemperature
* P0C7300 Circulation pump 1 for the low-temperature circuit has a malfunction.
* P0C7400 Circulation pump 2 for the low-temperature circuit has a malfunction.
CAUSE
In certain driving situations the software of the power electronics can trigger the attached fault code, which does not justify the replacement of the component.
REMEDY
- Generate quick test report with fault freeze frame data (via Print; Output to File)
- Generate control unit log of power electronics (electric motor control unit, N129/1) (via Print, Output to File)
- Erase fault memory
- Update power electronics to the latest software release if necessary
- Perform a test drive
- Read out fault memory. If no faults are stored, the vehicle can be handed over to the customer.
- If faults return stored again, generate a quick test report with fault freeze frame data and a control unit log of the power electronics (electric motor control unit, N129/1) and create a PTSS case with the data from steps 1 + 2.
CONTROL UNIT/FAULT CODE
| Control unit | Fault code | Fault text |
|---|---|---|
| N129/1 - Power electronics (SG-EM) (LE_TUBE) | P0A9400 | The control unit 'DC/DC converter' has a malfunction. _ |
| N129/1 - Power electronics (SG-EM) (LE_TUBE) | P0C7300 | Circulation pump 1 for the low-temperature circuit has a malfunction._ |
| N129/1 - Power electronics (SG-EM) (LE_TUBE) | P0C7400 | Circulation pump 2 for the low-temperature circuit has a malfunction._ |
| N129/1 - Power electronics (SG-EM) (LE_TUBE) | P0A4600 | Position sensor 'Electric machine B' has a malfunction. _ |
| N129/1 - Power electronics (SG-EM) (LE_TUBE) | P160600 | The control unit has a malfunction due to redundant monitoring. _ |
| N129/1 - Power electronics (SG-EM) (LE_TUBE) | P0AFB00 | The power supply of the high-voltage on-board electrical system is too high. _ |
| N129/1 - Power electronics (SG-EM) (LE_TUBE) | P0A3D00 | Inverter 'Electric machine B' has overtemperature. _ |
| N129/1 - Power electronics (SG-EM) (LE_TUBE) | P1B9000 | The power consumption from the on-board electrical system or the current supply into the on-board electrical system is too high._ |
OPERATION NUMBERS/DAMAGE CODES
| Op. no. | Operation text | Time | Damage code | Note |
|---|---|---|---|---|
| 54-1011 | PERFORM QUICK TEST | 04005 90 |