Opel Frontera UBS. Service manual — part 145
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–32
Check flow
Trouble code
Phenomenon
Standard
2
14
Front speed sensor signal open or
GND short, speed sensor com
open.
0.3 > sensor voltage
NOTE: The following procedure shows the case that the
front or rear sensor reference or common grounding line
is broken.
D04RW061
4B2–33
DRIVE LINE CONTROL SYSTEM (TOD)
Step
Action
Yes
No
1
1. Start the engine.
2. Select 4H (TOD) mode.
Is the memory except DTC 14?
Go to Step 3
Go to Step 2
2
Is the continuity harness of terminal 24 (vehicle side terminal of
the front speed sensor)?
Replace speed
sensor.
Go to Step 6
Repair the circuit.
Go to Step 6
3
Is the memory DTC 24?
Go to Step 4
Refer to other
trouble check
flow.
Go to Step 2
4
Is the continuity between harness of terminal 23 and 24 (vehicle
side terminal of the front and rear speed sensor)?
Go to Step 5
Repair the circuit.
Go to Step 6
5
Is the continuity between harness of terminal 18 and 15 (vehicle
side terminal of the speed sensor COM and ref)?
Replace front and
rear speed
sensor.
Go to Step 6
Repair the circuit.
Go to Step 6
6
1. Check that all the parts are mounted.
2. Clear the trouble code.
Is the step complete?
Repeat the
“Diagnosis Flow”.
The trouble is not
reproduced.
Refer to
“Troubles
intermittently
observed”.
Return to Step 6
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–34
Check flow
Trouble code
Phenomenon
Standard
3
16
The front speed sensor no pulse.
Hi level : 4.5
∼
6.0 V
Lo level : 0.7
∼
2.0 V
Frequency (F) =
GAS: 832 Hz (at 50 km/h)
NOTE: Find the trouble in which the pulse corresponding
to the running speed is not input.
D04RW061
4B2–35
DRIVE LINE CONTROL SYSTEM (TOD)
Step
Action
Yes
No
1
1. Connect TECH 2.
While running in TOD mode, does TECH–2’s front speed sensor
indication change with vehicle speed?
Go to Step 2
Repair and
inspection front
speed sensor
tone wheel.
Go to Step 4
2
Is the continuity harness of terminal 24 (vehicle side terminal of
the front speed sensor)?
Replace speed
sensor.
Go to Step 3
Repair the circuit.
Go to Step 3
3
1. Clear the trouble code.
While running at 40 kph in TOD mode for 30 consecutive sec, is
trouble code reissued?
Replace ECU.
Go to Step 4
Go to Step 4
4
1. Check that all the parts are mounted.
2. Clear the trouble code.
Is this step complete?
Repeat the
“Diagnosis Flow”.
The trouble is not
reproduced.
Refer to
“Troubles
intermittently
observed”.
Return to Step 4
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