Connecting the Breakout Box, Central Electronic Module (CEM)

Connecting the breakout box

Special tools:
951 2899 CEM adapter 951 2899 CEM Adapter
951 1428 Breakout box 951 1428 Breakout Box

General information
Check that the male and female terminals on the connectors are undamaged and secure (cannot be pressed in). Check that the cables to the female terminals are secured to the terminal pins.
The breakout box is designed to facilitate reading off the control module input and output signals when the control module is connected; and the cable and component resistance when the control module is disconnected. The use of a breakout box reduces the risk of accidental short-circuited cables and damage to the connector pins.

Connecting the breakout box
- Ignition off
- Remove fuses F3, F4, F12, F16 and F18 from the integrated relay/fusebox in the engine compartment

Connect breakout box 951 1428 Breakout box 951 1428 Breakout Box to the adapter.
Disconnect the breakout box in reverse order.

Note! Before the control module can be checked and measurements taken, the removed fuses must first be reinstalled.

Central electronic module (CEM)
- Connect adapter 951 2899 CEM adapter 951 2899 CEM Adapter to control module connectors A, B, C, D, E, F, G and H.
- For connector A, terminals #A1-#A46 correspond to terminals #1-#46 in the breakout box, when the breakout box is connected to output A
- For connector B, terminals #B1-#B32 correspond to terminals #1-#32 in the breakout box, when the breakout box is connected to output B
- For connector C, terminals #C1-#C46 correspond to terminals #1-#46 in the breakout box, when the breakout box is connected to output C
- For connector D, terminals #D1-#D14 correspond to terminals #1-#14 in the breakout box, when the breakout box is connected to output D/H
- For connector E, terminals #E1-#E41 correspond to terminals #1-#41 in the breakout box, when the breakout box is connected to output E
- For connector F, terminals #F1-#F32 correspond to terminals #1-#32 in the breakout box, when the breakout box is connected to output F
- For connector G, terminals #G1-#G32 correspond to terminals #1-#32 in the breakout box, when the breakout box is connected to output G
- For connector H, terminals #H1-#H32 correspond to terminals #15-#46 in the breakout box, when the breakout box is connected to output D/H.

Other information
- For further information about the fuses and relays, see the Wiring Diagram.