Page 145 - Workshop Manual - Aumark (BJ1051)

04-1
Diagnose- ABS system

ABS system

Precautions

1. Power off.
(a) Before you remove or install any electrical device or when tools or equipment are accessible
to bare electrical terminals, be sure to disconnect battery negative cable first in order to
prevent personal injury or vehicle damage.
(b) Ignition switch must be turned OFF unless specifically stated otherwise.
Tip:
If a central door lock is equipped, please do not leave your car key in your vehicle before battery
negative cable is disconnected so as to avoid locking doors.
2. Removing combination meter or disconnecting battery negative cable will clear day
odometer and clock on combination meter.
Tip:
Total odometer will not be cleared.
3. Disconnecting battery negative cable will cause audio system to lose saved settings.
Tip: 04
After battery negative cable is reconnected, you need to reset audio system. (Refer to “Operation
Manual of the Audio System” in Chinese and English.)
4. Ignition switch expressions

Ignition switch (position) Ignition switch expression

LOCK Ignition switch OFF
ACC Ignition switch in ACC

ON Ignition switch ON

START Engine start

5. Precautions for troubleshooting
In the case of terminal contact or part installation fault, removing and reinstalling the
(a)
suspected part may allow the system to return to normal completely or briefly.
To locate a trouble, you must check vehicle condition when the problem occurs. For
(b) example, check through DTC output and record these conditions before you disconnect
each connector or remove and install a part.
Unless specified otherwise in check steps, be sure to remove and install ABS control unit,
(c)
ABS solenoid valves, and stand-alone sensors with ignition switch OFF.
When reassembling the ABS control unit, or any ABS solenoid valve or sensor that has
been removed and reinstalled, you must check the system for normal operation after the
(d)
assembly is completed. You can either use a special tester to check DTC (diagnostic
trouble code) or read it through BC (blink code).
(e) Do not use a multimeter to measure any ABS control unit terminal directly.

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