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Control module connections

Control module connections

A simple means of checking whether the control modules are operative and allow diagnostics communication (column B) is given for each control module (column A) in the table below.

If the control module is not operative, check whether it is supplied with current and grounded (columns C-E).

Then check whether the control module is connected to the bus (column F) or the data link connector (column G).

Note

Some control modules also have other power supplies and ground connections, but they are not necessary for diagnostics communication.


A

B

C1

C2

D1

D2

E

F1

F2

G

Control module

Checking that the control modules allow diagnostics communication

+30

Pin

+30

Fuse

+15

Pin

+15

Fuse

Ground

Bus

(+)

Bus

(-)

K-lead

DICE

Intermittent wiper operation OK.

26

17

64

27

57

14

5

28 - data link connector pin 7

TWICE

Seat-belt warning lamp comes on when ignition switch turned to ON.

43

17

16

27

37

38

15

---

ACC

The display is active.

22

20

4

26

1

33

34

---

Infotainment head unit

A CD can be loaded.

Current (+15 circuit) must also be present on pin 2 of the 26-pin female connector.

8

9

2

21

4

18

17

---

CDC

A CD magazine can be loaded.

6

9

---

---

12

11

5

---

PMM

The potentiometers are supplied with 5 V.

Current (+15 circuit) must also be present on pin 2 of the 20-pin female connector.

1

11

2

27

8

19

20

---

MIU

The odometer display is active.

1

17

2

27

18

8

(I-bus)

17

(P-bus)

16

(I-bus)

9

(P-bus)

---

SID

The display is active.

1

8

28

27

32

30

31

---

PSM

The seat can be adjusted.

Current (+15 circuit) must also be present on pin 1 of the 8-pin female connector.

K1:6

25

K1:1

27

K1:7

K1:8

K1:4

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Trionic

The fuel pump runs for one second when the ignition switch is turned to ON.

23

17

43

27

25 and 47

66

19

---

Diesel V6

The fuel pump runs for one second when the ignition switch is turned to ON.





24

27

4 and 5

67

48

---

Diesel 4-cyl

Coolant temperature sensor supplied with power.





K16

27

K50, K52, K54, K56

K29

K17

K6 - data link connector pin 7

TCM

The oil temperature sensor is supplied with about 5 V.

33

12

31, 22

B

32, 23

25

26

---

SRS

The warning lamp comes on for three seconds when the ignition switch is turned to ON.

---

---

51

28

52

55

56

ABS

The warning lamp comes on for three seconds when the ignition switch is turned to ON.

17, 18

2

15

29

19

---

---

11 - data link connector, pin 8

TC/ABS

The warning lamp comes on for three seconds when the ignition switch is turned to ON.

17, 18

2

15

29

19

30

29

11 - data link connector, pin 8

ESP

The warning lamp comes on for three seconds when the ignition switch is turned to ON.

17, 18

2

15

29

19

30

29

11 - data link connector, pin 8

SPA

Check:

- the fuses that supply the SPA control module and the ground connection

- power supply at the control module

- bus leads to the control module

- that the pin in the control module connector has not been dislodged.

2(A)

8(A)

1(A)

26(A)

3(A)

4(A)

5(A)

- - -

Headlamps, xenon light system

The warning lamp comes on for three seconds when the ignition switch is turned to ON.

---

---

10

21

1

---

---

9 - data link connector, pin 8

DAH

--

1

5

---

---

2

---

---

5 - data link connector pin 8