EAT ECU (page 2 of 2)

AUTOMATIC TRANSMISSION – ZF 5HP24

44-2-44 DESCRIPTION AND OPERATION

Inputs and Outputs
The sensor signals allow the EAT ECU to monitor transmission operation. The ECU processes the incoming signals 
and compares this with data stored in its memory. If the received signals are not within the stored values, the ECU 
will make adjustments to the transmission operation using the solenoids to provide optimum driveability and 
performance.

The sensor inputs provide the EAT ECU with a constant update of the operating condition of the transmission and the 
engine. The ECU compares this input data with mapped information stored in its memory and will make any required 
adjustments.

EAT ECU Harness Connector C0193 Pin Details

EAT ECU Harness Connector C0932 Pin Details

EAT ECU Harness Connector C1835 Pin Details

Pin No.

Description

Input/Output

1

Ground for shift interlock solenoid

Input

2

Power supply for shift interlock solenoid

Output

3

Park signal to steering lock ECU

Output

4 to 17

Not used

–

18

HDC switch

Input

19

Selector manual Steptronic switch UP

Input

20

Selector manual Steptronic switch DOWN

Input

21 to 52

Not used

–

Pin No.

Description

Input/Output

1

Ignition power supply

Input

2

Not used

–

3

Diagnostic ISO 9141 K line bus

Input/Output

4

Electronic ground

–

5

Power ground

–

6

Power ground

–

7

Permanent battery power supply

Input

8

Power supply from main relay

Input

9

Power supply from main relay

Input

Pin No.

Description

Input/Output

1

Not used

–

2

Output shaft speed sensor screen

–

3

Output shaft speed sensor signal

Input

4

Inhibitor switch contacts L4

Input

5

Input shaft speed sensor screen

–

6

Ground for EPRS 5

Input

7

Ground for EPRS 4

Input

8 to 10

Not used

–

11

Power supply for EPRS's

Output

12

Temperature sensor supply

Output

13

Output shaft speed sensor supply

Output

14

Inhibitor switch contacts L3

Input

15

Not used

–

16

Ground for SV 3

Input

17

Ground for EPRS 3

Input