From 06/96

Function Test [11]

Preliminary testing

1. Review section 0 entirely before connecting the HHT.

Note: DTC readout is not possible using an impulse counter scan tool.

2. Connect the HHT to the data link connector (X11/4) according to the connection diagram (refer to section 0).

Note: Test cables are not to be hooked up to the HHT while performing component activations.

Read out DTC memory from ABS, ASR OR ETS control modules before starting repair procedures. DTC memory must also be read out from ME-SFI and EA control modules on vehicles with ASR.
The HHT will indicate the defective components in the display or will refer to the proper test step in the diagnostic manual.

Version Coding of control modules
When swapping ETS control modules, the ETS control module must be version coded using the HHT. Follow the directions as indicated in the display of the HHT. By using the test button "?" on the HHT, the version code of the control module will be displayed.

3. Additionally review: [21], [22], [23](connector connections).
4. Review the wiring diagrams:
5. Ignition: ON
6. Read out DTC memory.
7. Read out nominal/actual value displays.
8. Perform component activations.
9. Perform repairs according to DTC memory readout.
10. After completing repairs erase DTC memory.

The Electrical Test Program (ETP), see [23], pertains to the ABS, ETS, ASR and SPS systems.
In order to prevent the listing of all the control modules used in the various systems, for each test step, the following is used:
N47 = Control modules for Traction systems
A7/3 = Hydraulic unit for Traction systemsms