![](../../../img/35/AC312620AK00ENG.png)
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(1)Disconnect the connector A-03,
and connect special tool ABS Check Harness (MB991974) to
the wiring harness-side connector.
note |
Do not connect special tool
ABS Check Harness (MB991974) to the
ABS-ECU.
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(2)Turn the ignition switch to the "ON"
position. (3)Measure the voltage between terminal 20 and
earth. OK: System voltage
Q.
Is the check result normal?
Go to Step
3.
Go to Step
2.
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![](../../../img/35/AC312621AC00ENG.png)
![](../../../img/35/AC313139AB00ENG.png)
![](../../../img/35/AC313140AB00ENG.png)
![](../../../img/35/AC313578AC00ENG.png)
![](../../../img/35/AC313579AB00ENG.png)
![](../../../img/35/AC313793AB00ENG.png)
![](../../../img/35/AC313581AB00ENG.png)
![](../../../img/35/AC313582AB00ENG.png)
![](../../../img/35/AC313583AB00ENG.png)
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- ABS-ECU connector A-03
- Junction block connectors C-202 and C-203
- Joint connector (6) C-01 <LH drive
vehicles>, Joint connector (7) C-33 <RH
drive vehicles> and intermediate connector
C-124
- Ignition switch connector C-307
Check the connectors, for loose, corroded or damaged
terminals, or terminals pushed back
in the connector.
Q.
Is the check result normal?
An open or
short circuit may be present in the power supply line to the
ABS-ECU.
Repair the wiring harness between ABS-ECU connector A-03
terminal 20 and ignition switch connector
C-307 terminal 2. Go to Step 8.
Repair or
replace the damaged component(s). Then go to Step
8.
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![](../../../img/35/AC312620AH00ENG.png)
|
(1)Disconnect the connector A-03,
and connect special tool ABS Check Harness (MB991974) to
the wiring harness-side connector.
note |
Do not connect special tool
ABS Check Harness (MB991974) to the
ABS-ECU.
|
(2)Measure the resistance between terminal 26 and
earth. OK: 2 ohm or less
Q.
Is the check result normal?
Go to Step
5.
Go to Step
4.
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![](../../../img/35/AC312621AC00ENG.png)
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Q.
Is the check result normal?
An open
circuit may be present in the earth circuit. Repair the
wiring harness
between ABS-ECU connector A-03 terminals 26 and the body
earth. Then go to Step 8.
Repair or
replace the damaged component(s). Then go to Step
8.
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Check the battery (Refer to GROUP
54A, Battery test ).
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Q.
Is the check result normal?
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Charge or
replace the battery. Then go to Step 8.
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Check the charging system (Refer to
GROUP 16, Charging system ).
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Q.
Is the check result normal?
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Repair or
replace the charging system component(s).Then go to Step
8.
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Q.
Can the ABS-ECU communicate with the
M.U.T.-III?
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It can be assumed
that this malfunction is intermittent. Refer to GROUP 00,
How
to Use Troubleshooting/Inspection Service Points
- How to Cope with Intermittent
Malfunction .
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Replace the
ABS-ECU. Then go to Step 8.
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Q.
Can the ABS-ECU communicate with the
M.U.T.-III?
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The procedure is
complete.
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