Air Bag Control Module: Testing and Inspection

ETR Control Module / ETR With Airbag Control Module:

Installation Notes:
The arrow on the control module must face in direction of travel.
Test restraint system with Hand Held Tester (HHT).

Special Tools:

Commercially Available Tools and Testers:

X11/4 Data Link Connector
013 HHT

Testing After Replacing Control Module:
A diagnostic routine is integrated in the control module which tests the control module and the electrical components of the airbag system. If a fault is detected the SRS malfunction indicator lamp (A1e15) does not go out after not more than 20 seconds. The faults detected are stored and can be retrieved as a pulse readout using the malfunction indicator lamp (A1e15) or as a digital readout using a HHT.

Testing and Inspection

Notes Regarding Pulse Readout:
If the battery voltage LED comes on after connecting the HHT, the HHT and voltage supply are in proper order.

The digits 1 - 10 appear in the display of the HHT.

The digit 1 means that no system fault is stored. All other digits are assigned to a particular type of fault. If there are several faults in the system the fault with the lowest pulse number is indicated first.

If the first digit again appears during the test after at least two or more pulse readouts (digits) all the faults have been displayed

Pulse Readout Diagnosis
1. Connect HHT as shown in the connection diagram.
- Battery voltage LED in display panel must light up.
2. Switch Ignition ON.
3. Press Start button for between 2 and 4 seconds:
- If 1 appears there is no fault in the system.
- If a different digit appears rectify (repair as necessary) displayed fault.

After installing a new control module it must be programmed and the parameters must be set with the HHT.