Terminal connection diagram 
Test steps - If the lighting of the gear selector switch is defective, replace the defective light bulb.
- Open plug connection S2.
Depending on what fault is displayed by the diagnosis, apply button (switch) according to the following table and measure resistance between contacts.
If all measurements yield R = RTarget, continue with point 4.
| Button, switch | S2: Measure between +TL and: | RTarget [Ω]: Pushbutton depressed/not depressed | | 1 | 21 (-UB) | approx. 580 | | 2 | 21 (-UB) | approx. 580 | | 3 | 21 (-UB) | approx. 580 | | D | 21 (-UB) | approx. 580 | | N | 21 (-UB) | approx. 580 | | R | 21 (-UB) | approx. 580 | | Rev. inh. | | approx. 580 |
| Button, switch | S2: Measure betw. contact 29 (TS) and: | RTarget [Ω]: Pushbutton depressed (N depressed) [N not depressed] | | 1 | 10 (/N) | 0 (∞) | | 2 | 10 (/N) | 0 (∞) | | 3 | 10 (/N) | 0 (∞) | | D | 10 (/N) | 0 (∞) | | N | 10 (/N) | ∞ [0] | | R | 10 (/N) | 0 (∞) | | Rev. inh. | | |
| Button, switch | S2: Measure betw. contact 29 (TS) and: | RTarget [Ω]: Pushbutton depressed (not depressed) | | 1 | 27 (S1) | 0 (∞) | | 2 | 45 (S2) | 0 (∞) | | 3 | 9 (S3) | 0 (∞) | | D | 28 (+V) | 0 (∞) | | N | | | | R | 46 (+R) | 0 (∞) | | Rev. inh. | 30 (RS) | 0 (∞)* |
*= Resistance value with R pushbutton depressed simultaneously - Open S7.
Depending on what fault is displayed by the diagnosis, apply pushbutton (switch) according to the following table and measure resistance between contacts.
| Button, switch | Measure between +TL and: | RTarget [Ω]: Pushbutton depressed/not depressed | | 1 | 10 (-UB) | approx. 580 | | 2 | 10 (-UB) | approx. 580 | | 3 | 10 (-UB) | approx. 580 | | D | 10 (-UB) | approx. 580 | | N | 10 (-UB) | approx. 580 | | R | 10 (-UB) | approx. 580 | | Rev. inh. | | |
| Button, switch | Measure betw. contact 29 (TS) and: | RTarget [Ω]: Pushbutton depressed (N depressed) [N not depressed] | | 1 | 11 (SSP) | ∞ (0) | | 2 | 11 (SSP) | ∞ (0) | | 3 | 11 (SSP) | ∞ (0) | | D | 11 (SSP) | ∞ (0) | | N | 11 (SSP) | 0 [∞] | | R | 11 (SSP) | 0 (∞) | | Rev. inh. | | |
| Button, switch | Measure betw. contact 7 (TS) and: | RTarget [Ω]: Pushbutton depressed (N not depressed) | | 1 | 9 (/N) | 0 (∞) | | 2 | 9 (/N) | 0 (∞) | | 3 | 9 (/N) | 0 (∞) | | D | 9 (/N) | 0 (∞) | | N | 9 (/N) | ∞ [0] | | R | 9 (/N) | 0 (∞) | | Rev. inh. | | |
| Button, switch | Measure betw. contact 7 (TS) and: | RTarget [Ω]: Pushbutton depressed (not depressed) | | 1 | 1 (S1) | 0 (∞) | | 2 | 2 (S2) | 0 (∞) | | 3 | 3 (S3) | 0 (∞) | | D | 4 (+V) | 0 (∞) | | N | | | | R | 5 (+R) | 0 (∞) | | Rev. inh. | 6 (RS) | 0 (∞)* |
- Check resistance to ground: S2, contacts 9,10, 21, 27, 28, 29, 30,33, 45, 46.
RTarget = ∞ Ω.
Notice: variable signal The assignment to a connection of the transmission control unit is accomplished in the data record and is vehicle-specific. |
