|
|
Use the following steps to remove
the connector cover and measure the terminal
voltage.
|
|
1.Move the lock lever of the
ABS-ECU connector as shown in the illustration, and then
disconnect
the ABS-ECU connector.
|
|
2.Connect special tool ABS
check harness (MB991974) to measure the voltages between
each
check connector terminals and earth terminals 13 or
26.
|
|
1.Measure the voltages
between earth terminal (13) or (26) and each respective
terminal.
2.The terminal layouts are shown in the
illustrations below.
| note |
Do not measure terminal
voltage for approximately three seconds after
the ignition switch
is turned to the "ON" position. The ABS-ECU
performs the initial check during that
period.
|
Terminal No.
|
Check item
|
Checking
requirements
|
Normal condition
|
1
|
Solenoid valve power
supply
|
Ignition switch: "ON"
|
System
voltage
|
3
|
Wheel
speed sensor (RL) power supply
|
Ignition switch: "ON"
|
System
voltage
|
5
|
Wheel
speed sensor (FR) power supply
|
Ignition switch: "ON"
|
System
voltage
|
9
|
Wheel
speed sensor (FL) power supply
|
Ignition switch: "ON"
|
System
voltage
|
11
|
Wheel
speed sensor (RR) power supply
|
Ignition switch: "ON"
|
System
voltage
|
14
|
Motor
power supply
|
Ignition switch: "ON"
|
System
voltage
|
16
|
Stop lamp
switch input
|
Stop
lamp switch: "ON"
|
System
voltage
|
Stop
lamp switch: "OFF"
|
Approximately 0 V
|
20
|
ABS-ECU
power supply
|
Ignition switch: "ON"
|
System
voltage
|
Ignition switch: "START"
|
Approximately 0 V
|
|
|
1.Turn the ignition switch
to the "LOCK" (OFF) position and disconnect the ABS-ECU
connectors
before checking resistance and continuity.
2.Check
the resistance and continuity between the terminals
indicated in the table below.
3.The terminal
layout is shown in the illustration.
ABS-ECU terminal
No.
|
Signal
|
Normal condition
|
13
-
body earth
|
Earth
|
Less
than 2 Ω
|
26
-
body earth
|
Earth
|
Less
than 2 Ω
|
|