Defect Code
Power Voltage
28
Residual Temperature
29
Measurement (ABD only)
Acceleration Sensor Signal (wire)
42
Application
ANTILOCK BRAKE SYSTEM 4F-17
Description
when switch knob (planger) is pressed by 3mm : ∞
- Each ends resistance value of the switch when
switch knob(plunger) is not pressed :
less than 200 mΩ
When brake is applied :
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ECU (ABS:No.14, ABD:No.48) terminal 11 - 14 V
or VBattery.
When brake is released :
ECU (ABS:No.14, ABD:No.48) terminal 0 V
Check battery voltage.
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Resistance between ECU (ABD:No.28 & 29,
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ABS:No.19) pins and battery negative terminal :
less than 20 mΩ
Resistance between ECU No.1 (ABS:NO.15) pin and
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ignition terminal : less than 60 mΩ
Check that normal voltage is applied to ECU
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(ABD:No.1, ABS:No.15) pin when ignition switch is
turned to "ON" or "OFF".
Check ABS fuses of 15A and 80A.
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Replace the ECU.
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Check wire (ECU No.50) for open or loose contact.
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Check connection between connectors.
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Check relevant wires for open or short.
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(When connector is removed)
Check voltage between ECU side ground (ABD:No.1,
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ABS:No.15 pin) and acceleration sensor side ground
(ABD:No.1, ABS:No.15 pin / ECU side ABD:No.39,
ABS:No.30 pin)
(When connector is installed and power is applied)
- Voltage : less than 0.25 V
Check voltage among related terminals.
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(When connector is installed and power is applied)
- Voltage between ECU (ABD:No.43, ABS:No.28 pin
and ABD:No.39, ABS:No.30 pin)
: 4.75 - 5.25 V
- Signal voltage between ECU (ABD:No.51,
ABS:No.10) pin and (ABD:No.39, ABS:No.30) pin
: 1.95 V - 3.45 V
(Measure it by laying acceleration sensor horizon-
tally and without external force)