SK solenoid valve The lines are short-circuited to each other in the operating coil's electric circuit
|  | Connector controllable solenoid valve
|  | 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
|  | Troubleshooting
|  | Final function check
|  | See also:
Connector controllable solenoid valve
Pin assignment for solenoid valve 4 = operating coil: connection to supply 2 = operating coil: connection to ground 1 = measuring coil: connection to supply 3 = measuring coil: connection to ground |  |
Description Short circuit of lines to each other in operating coil circuit Effects on the driving operation Driving in fourth gear is not possible. Possible causes Short-circuit in plug connection, cabling or solenoid coil. 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 Operating coil of the SK solenoid valve Cabling between solenoid valve SK and transmission control unit Instruction 1. Check plug connections and cabling. 2. Check solenoid coil. Setting conditions of the event No description available. Test conditions of the event No description available. Troubleshooting Check plug connections and cables. Pull connector at solenoid. Check that solenoid is internally intact: When measuring the coil resistances, please observe the dependence on the temperature. Simultaneously to the resistance measurement, the temperature of the solenoid enclosure has to 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. 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. Measuring coil Measure the resistance between pin 1 and pin 3. The measuring coil works correctly if the measured resistance deviates from the nominal resistance by not more than ± 0.5 Ω. No resistance – no connection – must be measurable between the pins and the solenoid enclosure; 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 solenoid valve 4 = Operating coil: Supply connection 2 = Operating coil: Ground connection 1 = Measuring coil: Supply connection 3 = Measuring coil: Ground connection |  |
Characteristics: A = Operating coil B = Measuring coil 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 a short-circuit of two signals
|  | Aftersales service index
© by Voith Turbo GmbH & Co. KG, S. Brunnengräber send remarks to stefan.brunnengraeber@voith.com (documentation department)