Opel Frontera UBS. Service manual — part 160
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–92
Chart 3
The shift on the fly system generates gear noises.
(The fuel economy is bad in the 2H mode.)
Function of circuit
—
Fail condition
When the vehicle is run in the 2H mode, the shift on the fly system generates gear
noises or the front wheel gears are engaged to generate a shock.
D04RW055
4B2–93
DRIVE LINE CONTROL SYSTEM (TOD)
Step
Action
Yes
No
1
Do the indicator lamps show the correct status?
Go to Step 2
Examine the
trouble based on
“Diagnosis from
Trouble Codes”.
Go to Step 2
2
Is any of the trouble codes 28, 32 and 33 recorded?
Examine the
trouble based on
“Diagnosis from
Trouble Codes”.
Go to Step 6
Go to Step 3
3
Turn on the starter switch.
Is the battery voltage observed between terminals 1 and 20?
Go to Step 4
Go to Step 5
4
When the 4WD SW is select to the 2WD position, are the front
axle gears correctly disengaged (and when the left front tire is
jacked up and turned, is the front propeller shaft standstill)?
The phenomenon
is not
reproduced.
Refer to
“Troubles
intermittently
observed”.
Go to Step 6
The shift on the
fly system is
failed (refer to
Section 4C “Drive
Shaft System”.
Go to Step 6
5
Does the battery voltage maintain the correct level?
Repair the battery
circuit.
Go to Step 6
Repair the battery
and charging
system.
Go to Step 6
6
Check that all the parts are mounted.
Is this step complete?
Repeat the
“Diagnosis Flow”.
Return to Step 6
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–94
Chart 4
The braking distance gets long even when the ABS is active.
Function of circuit
—
Fail condition
Enough deceleration is not obtained and the braking distance gets long even when the
ABS is active in the 2H mode.
D04RW055
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–95
Step
Action
Yes
No
1
Are the brake and ABS systems healthy?
Go to Step 2
Repair the
brake and ABS.
Go to Step 4
2
Turn on the starter switch.
Is the battery voltage observed between terminals 1 and 20?
Go to Step 3
Repair the
battery system.
Go to Step 4
3
1. Select the 4WD SW to the 2WD position.
2. The voltage between terminals 3 and 19 range between 7.5
and 16V (0.24 seconds make a cycle)
Does the voltage within the range specified?
Examine the
trouble based
on “Diagnosis
from Trouble
Codes".
Go to Step 4
The ECU has
failed. Replace
the ECU.
Go to Step 4
4
Check that all the parts are mounted.
Is this step complete?
Repeat the
“Diagnosis Flow".
Return to Step 4
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