GB. Connecting the Test Box

GB. Connecting the Test box

Special tools: 9813190, 3195

GB1

Connecting the Test box






NOTE: For connection of test box to the engine control module ECM Fenix 5.2, LH 3.2/ EZ129K or Motronic 4.3).

NOTE: The control module must be disconnected from the power supply whenever the test box is connected or disconnected. Failure to observe this procedure could seriously damage the control module.

- Ignition OFF
- Disconnect the transmission control module (TCM)







Connect adapter 981 3195 to the TCM connector and connect test box 981 3190 to the adapter.

NOTE: Ensure that adaptor is correctly fitted i.e. that measuring box cable harness is at outer side of box (i.e. fender side).

- TCM disconnected.

Proceed with checking the ground points GB2.


GB2

Checking ground points






- Ignition OFF
- Turn off all equipment in the car that takes power from the battery, e.g. interior lighting and radio etc.

Connect an ohmmeter between the battery negative terminal and:

- #20 (#A20) on the text box
- #29 (#A29) on the test box.

The ohmmeter should read approx. 0 ohms for all readings.

If all readings are OK:
Return to fault-tracing procedure in progress.

If any reading is incorrect:
- Check ground points 31/32 and 31/33, the cables between the ground points and the TCM #A20 and #A29, for a break in the circuit as per FA2 and contact resistance and oxidation as per FA6. FA. Checking Wiring and Connections

- Check the ground cable between the battery and body point for breaks as per FA2, and contact resistance and oxidation as per FA6. FA. Checking Wiring and Connections

Return to fault-tracing procedure in progress.