System Test: Overview

SYSTEM TEST OVERVIEW (ABS and ABS/TC)


NOTE: The static test must be performed at the start of the system test. Locate and remedy any detected fault. Proceed with the system test only after the static test has been completed successfully.


NECESSARY TEST STEPS WITH ABS 5.3 (3-channel system):


NOTE: On vehicles with Solo ABS, the test begins with the static test (test step 2). The test steps in brackets are not necessary (possible only with a 4-channel system).


Test step

(1)
2 Static test (start of test)
3 - 4 Stop-light switch and terminal 61 signal
5 ABS MIL
(6 - 10)
11 Return pump operation
12 - 17 ABS solenoid valves (6 ea./function and incorrect allocation)
(18 - 19)
20 - 23 Speed sensors (function and incorrect allocation)
(24)


NECESSARY TEST STEPS WITH ABS/TC 5.3 (4-channel system):

Test step

1 Version coding (start of the test/possible only on vehicles with TC)
2 Static test
3 - 4 Stop-light switch and terminal 61 signal
5 - 8 MIL and information lights
9 Intake valve
10 Switch-over valve
11 Return pump operation
12 - 19 ABS solenoid valves (8 ea./function and incorrect allocation)
20 - 23 Speed sensors (function and incorrect allocation)
24 Engine speed information to ABS/TC control module