PRE-RELEASE
Test readings, control module connections
| Test readings, control module connections |
| Scope |
The following pages include the values and readings for measuring the signals and levels on the TC/ABS control module.
| Points to remember: |
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Observe the test conditions. Use common sense in assessing the readings.
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The test readings presented are taken with the ignition switched ON unless otherwise stated.
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Start by checking that the control module is receiving power and is grounded.
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Check all sensor inputs and signals from other systems.
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Finally, check the control module outputs. Remember that the readings do not provide an indication that the actuator is operating.
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If any reading is not OK, consult the wiring diagram to trace the leads, connectors or components that need further checking.
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The specified readings are valid for a correctly calibrated Fluke 88/97.
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The readings %(+) and ms(+) indicate the pulse ratio and pulse length. A test instrument capable of measuring both pulse ratio and pulse length must be used. The "+" sign denotes a positive trigger pulse (TRIG+).
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| Control module connections |
| Important | ||
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BOB cable assemblies have not been produced for ABS 5.3, ABS 5.4 or TC/ABS 5.3. Unless otherwise stated, the test readings are those that should be obtained on the control module connector (unplugged). For TC/ABS 5.3, certain readings can be taken with the BOB cable assembly connected to the Trionic T7 control module, see the notes under Test reading. |
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> = greater than; < = less than; ~ = alternating current (LP: LOGIC PROBE P = select pulse; p = visible pulse)
| Pin | Cable colour | Component/function | In/Out | Test conditions | Test across | Test reading | See |
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1
|
WH
|
Wheel sensor, RR: Reference ground
|
In
|
Rotate the wheel one turn per second
|
1-2
|
>100 mV AC
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2
|
VT
|
Wheel sensor, RR: Signal input
|
In
|
Rotate the wheel one turn per second
|
2-1
|
>100 mV AC
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3
|
GN
|
Wheel sensor, FR: Reference ground
|
In
|
Rotate the wheel one turn per second
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3-5
|
>100 mV AC
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4
|
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Spare
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5
|
GY
|
Wheel sensor, FR: Signal input
|
In
|
Rotate the wheel one turn per second
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5-3
|
>100 mV AC
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6
|
BU
|
Wheel sensor, FL: Reference ground
|
In
|
Rotate the wheel one turn per second
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6-7
|
>100 mV AC
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7
|
VT
|
Wheel sensor, FL: Signal input
|
In
|
Rotate the wheel one turn per second
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7-6
|
>100 mV AC
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8
|
BK
|
Wheel sensor, RL: Reference ground
|
In
|
Rotate the wheel one turn per second
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8-9
|
>100 mV AC
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9
|
YE
|
Wheel sensor, RL: Signal input
|
In
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Rotate the wheel one turn per second
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9-8
|
>100 mV AC
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10
|
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Spare
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11
|
GN
|
Data link
|
In/Out
|
Tech 2 not connected
|
11-B-
|
0 V
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Tech 2 connected and TC/ABS selected for communication
|
11-B-
|
about 10 V
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12
|
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Spare
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13
|
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Spare
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14
|
GN/GY
|
Brake light switch
|
In
|
Brake pedal depressed
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14-B-
|
B+
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Brake pedal released
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14-B-
|
0 V
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15
|
RD/BU
|
Current (+15 circuit)
|
In
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15-B-
|
B+
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16
|
BK
|
Pump motor ground
|
In
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B+-16
|
B+
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17
|
RD
|
Current (+30 circuit)
|
In
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17-B-
|
B+
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18
|
RD
|
Current (+30 circuit)
|
In
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18-B-
|
B+
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19
|
BK
|
Ground
|
In
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B+-19
|
B+
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20
|
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Spare
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21
|
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Spare
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22
|
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Spare
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23
|
GN
|
Signal from wheel sensor, rear left
Used by special equipment |
Out
|
Rotate the wheel one turn per second
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>100 mV AC
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24
|
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Signal from wheel sensor, rear right
Used by special equipment |
Out
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Rotate the wheel one turn per second
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>100 mV AC
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25
|
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Spare
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26
|
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Spare
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27
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Spare
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28
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Spare
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29
|
WH
|
CAN-L
|
Bus information
|
Cannot be measured
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30
|
GN
|
CAN-H
|
Bus information
|
Cannot be measured
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31
|
PK
|
Switch, TCS ON/OFF
|
In
|
Switch not depressed
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B+-31
|
0 V
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Switch depressed
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B+-31
|
B+
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