WR solenoid valve Short-circuit to supply voltage in the operating coil's electric circuit
|  | Description
|  | Effects on the driving operation
|  | Possible causes
|  | Connection of the solenoid valve
|  | Connector pin assignment of transmission control unit
|  | Pin assignment of transmission connector
|  | Internal cable harness
|  | Installation point of the solenoid valve
|  | Place of action
|  | Instruction
|  | Setting conditions of the event
|  | Test conditions of the event
|  | Connector switched solenoid valve
|  | Troubleshooting
|  | Final function check
|  | See also:
Description Short circuit or low-resistance connection to supply voltage at operating coil. Effects on the driving operation Depending on where the fault is located in the operating coil circuit, the vehicle will respond as follows: Driving is not possible. Retarder function only with maximum torque Driving in reverse gear is restricted. Possible causes Short-circuit in plug connection or cabling. Connection of the solenoid valve 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 solenoid valve Place of action WR solenoid valve Cabling between solenoid valve WR and transmission control unit Instruction Check plug connections and cabling. Setting conditions of the event No description available. Test conditions of the event No description available. Connector switched solenoid valve
Pin assignment for solenoid valve 4 = operating coil: connection to supply 2 = operating coil: connection to ground |  |
Troubleshooting Check plug connections and cables. Pull connector at solenoid. Check that solenoid is internally intact: When measuring the coil resistance, please observe the dependence on the temperature. Simultaneously to the resistance measurement, the temperature of the solenoid housing has to be measured also or estimated with utmost accuracy. Read the nominal resistance indicated in the temperature curve below and compare it to the measured or estimated temperature. Operating coil Measure the resistance between pin 4 and pin 2. The operating coil works correctly if the measured resistance deviates from the nominal resistance by not more than ± 1 Ω. Replace the control unit. If none of the above measures brings any improvement, please contact the Voith Turbo headquarters.
Pin assignment for solenoid valve 4 = Operating coil: Supply connection 2 = Operating coil: Ground connection |  |
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 short-circuit to 24 V
|  | Aftersales service index
© by Voith Turbo GmbH & Co. KG, S. Brunnengräber send remarks to stefan.brunnengraeber@voith.com (documentation department)