Testing Anti-Jerk Control (ARA)

Testing anti-jerk control (ARA)

Connection diagram of digital tester without adapter, location of components:

Connection diagram of pulse counter, hand-held tester
013 Pulse counter
087 Hand-held tester
X11/4 Test coupling for diagnosis (16-pin)
G1 Battery

Pulse counter
Black cable Terminal 31 (ground) or contact 1
Red cable Terminal 15 (ignition), terminal 30 (battery) or contact 16
Yellow cable Contact 4 (ARA, ELR/ARA control unit)

Hand-held tester
Black cable Terminal 31 (ground) or contact 1
White cable Terminal 15 (ignition) or contact 16
Red cable Terminal 30 (battery), X4/10 (terminal block) or contact 3
Yellow cable Contact 4 (ARA, ELR/ARA control unit)






Connect digital tester (001) and pulse generator (021).
Check accelerator control for ease of movement.
Check idle speed stop at Bowden cable (32); the spring plate (29/7) must be resting free of tension against the compression spring (29/8).
Test overvoltage protection fuse.
Test battery voltage. approx. 12 V. Measured at overvoltage protection between contacts 1 and 5.
Warm Engine to coolant temperature of 60-80 °C.

Test with pulse counter

Connect pulse counter (013) to battery (G1) and to test coupling (X11/4) according to connection diagram.

Note: LED U-Batt in display panel must come on; if not:
a) Test fuse of pulse counter.
b) Test contact 1 of test coupling (X11/4) to battery positive (approx. 11 - 12 V).
c) Test contact 4 of test coupling (X11/4) to contact 1 (approx. 6 - 12 V).

Run engine run at idle speed.
Press start button of pulse counter (013) for 2 - 4 seconds.
Read display and note.
Readout "1": no fault
Readout greater then "1": fault in system

Press start button of pulse counter (013) once again for 2 - 4 seconds.
If there is no further fault in system, the previous readout reappears. If there is a further fault in the system. its fault code is displayed.

Rectify noted faults after test program
"testing individual components".
Engine 605.911 see section "a"
Engine 606.910 see section "b"

Erase fault memory by pressing start button of pulse counter and reading rectified fault. Then press start button for 6 - 8 seconds

Note: Each fault displayed must be erased individually. Once the fault has been rectified and erased, the fault code no longer appears during the fault output.
Digit greater than 1 displayed, further faults in system.

Test with hand-held tester

Connect Hand-held tester (087) according to connection diagram.
The test cycle is integrated in the HHT program.

Note: Reading, erasing fault memory, see operating instructions of hand-held tester.

Special tools










Testing individual components