1.3 - General User's Guide

General User's Guide

The following description explains how to carry out the test steps.

Step 1:
In the main diagnosis test (7.), the individual test steps must be worked through one after the other. If a fault code is set under test step 4, the subsequent test steps are omitted. References in the tables enable a directed diagnosis which leads to the cause of the fault.

Example: 7. Main diagnosis test; test step 3
3 - Establish communication with the PSM control module
See table " 7.1 Connecting diagnostic tester and establishing communication".

The work instruction contains a reference to table 7.1, Connecting diagnostic tester and establishing communication. The next work steps are described here.

Test T01 - T02:

This table enables testing to be carried out in steps. If the test T01 is completed successfully, the next test T02 follows. If this test is also completed successfully, then T03 follows, etc. If the control module search does not function in the case above, then a remedy for the problem is provided in 8.1.

"8.1 No communication between diagnostic tester and control module"

Test T01 - T02:

Possible fault causes can be identified by consistently checking all steps. The control module can only be replaced once all other possibilities have been ruled out. The next step in the main diagnosis test is test step 4. Read out fault memory. The procedure here is identical.
If no fault is stored with "present" status, test steps 6 - 11 must be carried out until the cause of the fault has been found.