Opel Frontera UBS. Service manual — part 1045
![](/vehicle/goneen/quin/zou/wen.png)
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–120
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.
D04RY00073
![](/vehicle/goneen/quin/zou/qusay.png)
4B2–121
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
“Touble Diagnosis
Depending on
The Status of
TOD Indicator”.
2
Is any of the trouble codes 28(P1760), 32(P1761) and 33(P1762)
recorded?
Examine the
trouble based on
“Diagnosis from
Trouble Codes”.
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 AUTO SW is selected 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”.
The shift on the
fly system is
failed (refer to
Section 4B1 and
4C.)
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
![](/vehicle/goneen/quin/zou/wntknonldayb.png)
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–122
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.
D04RY00073
![](/vehicle/goneen/quin/zou/meystab.png)
DRIVE LINE CONTROL SYSTEM (TOD) 4B2–123
Step
Action
Yes
No
1
Are the brake and ABS systems healthy?
Go to Step 2
Repair the
brake and ABS.
Refer to
section 5A.
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 AUTO SW to the 2WD position.
2. The voltage between terminals 3 and 19 range between 7.5
and 16V (0.12 seconds make a cycle)
Does the voltage within the range specified?
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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