Transmission oil temperature sensor E300.1 Implausible temperature jump
|  | Description
|  | Effects on the driving operation
|  | Possible causes
|  | Connection of the temperature sensor
|  | Connector pin assignment of the transmission control unit
|  | Connector pin assignment of the transmission connector
|  | Internal cable harness
|  | Installation point of the temperature sensor
|  | Location
|  | Instruction
|  | Setting conditions for the event
|  | Test conditions for the event
|  | Temperature sensor connector T-SUMP E300.1
|  | Troubleshooting
|  | Final function check
|  | See also:
Description Implausible temperature jump The measured temperature has increased by more than 60°C within 0.8 sec. Effects on the driving operation Unable to detect temperature, possible consequences: Hard shifts with transmission oil cold. The temperature-related deactivation of the retarder is restricted. Possible causes An implausible temperature jump indicates a suddenly occurring contact resistance in the plug-in contacts. Connection of the temperature sensor Connector pin assignment of the transmission control unit
Pin | Stecker A | Stecker B | Stecker C | Stecker D
1 | SHIELD | EK | FLEXI-1 | -BATT
2 | TIM+ | DK | --- | IGN
3 | TIM- | SK | FLEXI-3 | FLEXI-11
4 | N1+ | RBK | FLEXI-4 | K-LINE
5 | N1- | TB | FLEXI-5 | CAN1-H
6 | N2+ | --- | FLEXI-6 | CAN1-H
7 | N2- | RBG | FLEXI-7 | CAN-SHLD
8 | N3+ | PB | FLEXI-8 | CAN1-L
9 | N3- | WR | FLEXI-9 | CAN1-L
10 | --- | WP | FLEXI-10 | CAN2-H
11 | --- | --- | FLEXO-2H | CAN2-H
12 | EKM | FLEXI-12 | FLEXO-4H | CAN2-L
13 | DKM | S-GND | FLEXO-3H | CAN2-L
14 | SKM | OIL-LVL | FLEXO-5L | CAN1-R
15 | PBM | T-SUMP | --- | ---
16 | TBM | --- | --- | FLEXO-1L
17 | RBKM | T-CONV | --- | CAN2-R
18 | MVM-GND | MV-GND | --- | +BATT
Connector pin assignment of the transmission connector
Pin | Name | Pin | Name | Pin | Name
1 | S-GND | 14 | RBK | 27 | EKM
2 | MV-GND | 15 | RBG | 28 | PBM
3 | MV-GND | 16 | TB | 29 | RBKM
4 | --- | 17 | WR | 30 | TBM
5 | T-CONV | 18 | --- | 31 | MVM-GND
6 | T-SUMP | 19 | --- | 32 | N1+
7 | OIL-LVL | 20 | --- | 33 | N1-
8 | P-DIFF | 21 | TIM- | 34 | N2+
9 | SK | 22 | TIM+ | 35 | N2-
10 | DK | 23 | --- | 36 | N3+
11 | EK | 24 | SHIELD | 37 | N3-
12 | PB | 25 | SKM |  |
13 | WP | 26 | DKM |  |
Internal cable harness Installation point of the temperature sensor Location Engine speed sensor (negative terminal of sensor or sensor circuit) Instruction Check plug connections, cabling and sensor. Setting conditions for the event No description available. Test conditions for the event No description available. Temperature sensor connector T-SUMP E300.1
Pin assignment for combined oil level / temperature sensor 1 top = S-GND = oil level sensor ground 2 top = OIL-LVL = oil level signal 1 bottom = S-GND = temperature sensor ground 2 bottom = T-SUMP = temperature signal |  |
Troubleshooting Check plug connections and cables. (Instruction: see "Related Topics") Disconnect the plug connection at the temperature sensor. Check that the sensor is internally intact: When measuring the resistance, please observe the dependence on the temperature. Simultaneously to the resistance measurement, the sensor temperature has to be measured, too, or estimated with utmost accuracy. Compare the nominal resistance as indicated in the temperature curve below and compare it to the measured or estimated temperature. Measure the resistance between pin 1 and pin2 (bottom). The sensor works correctly if the measured resistance deviates from the nominal resistance by not more than ± 50 ohms. No resistance – no connection – must be measurable between the pins and the sensor housing; the resistance is infinitely large. Replace the control unit. If none of the above measures brings any improvement, please contact the Voith Turbo headquarters.
Pin assignment for combined oil level / temperature sensor 1 top = S-GND = oil level sensor ground 2 top = OIL-LVL = oil level signal 1 bottom = S-GND = temperature sensor ground 2 bottom = T-SUMP = temperature signal |  |
Characteristic Final function check If the defective component cannot be clearly identified, you should try to reproduce the fault: Reinstall the component in the vehicle. Test the function. After the fault has been eliminated, the following steps have to be carried out: Conduct a test drive with function check. Read out the fault memory. Check the transmission for leaks. Perform a final visual inspection. These steps are necessary to ensure the entire vehicle functions. See also:
|  | Troubleshooting for cable break
|  | Aftersales service index
© by Voith Turbo GmbH & Co. KG, S. Brunnengräber send remarks to stefan.brunnengraeber@voith.com (documentation department)