Retarder oil temperature sensor Line interruption in sensor circuit
|  | Description
|  | Effects on the driving operation
|  | Possible causes
|  | Connection of the temperature sensor
|  | Connector pin assignment of transmission control unit
|  | Pin assignment of transmission connector
|  | Internal cable harness
|  | Installation point of the temperature sensor
|  | Place of action
|  | Instruction
|  | Setting conditions of the event
|  | Test conditions of the event
|  | Temperature sensor connector T-CONV
|  | Troubleshooting
|  | Final function check
|  | See also:
Description Line interruption in sensor circuit Effects on the driving operation Unable to detect temperature, possible consequences: The temperature-related deactivation of the retarder is restricted. Possible causes Connector unplugged, too high contact resistance between plug-in contacts or break in the sensor cabling. Connection of the temperature sensor Connector pin assignment of 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
Pin assignment of 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 Accessibility Remove control cover. Remove blocks with solenoids. Place of action No description available. Instruction Check plug-in contacts, cabling and sensor. Setting conditions of the event No description available. Test conditions of the event No description available. Temperature sensor connector T-CONV
Pin assignment for retarder oil temperature sensor 1 = supply connection 2 = ground connection ATTENTION: The pin assignment of the temperature sensors for transmission oil and retarder oil is vice versa in the circuit diagram since the circuit diagram is laid out in preparation for the future combined temperature / oil level sensors for the transmission oil temperature. |  |
Troubleshooting Check the 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. Read the nominal resistance indicated in the temperature curve below and compare it to the measured or estimated temperature. Measure the resistance between pin 1 and pin 2. 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 retarder oil temperature sensor 1 = Supply connection 2 = Ground connection ATTENTION: The pin assignment of the temperature sensors for transmission oil and retarder oil is vice versa in the circuit diagram since the circuit diagram is laid out in preparation for the future combined temperature / oil level sensors for the transmission oil temperature. |  |
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)