SK solenoid valve Non-diagnosable fault in the measuring 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
|  | 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 Undiagnosible fault in the measuring coil circuit Effects on the driving operation Hard shifts All gear changes may be concerned, especially 3-4 shifts. Possible causes Fault 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 Measuring 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 See also:
|  | Troubleshooting a short-circuit to ground
|  | 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)