Opel Frontera UBS. Service manual — part 159
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–88
Step
Action
Yes
No
1
Are the front and rear tires in specified size?
Go to Step 2
Replace the tires
with specified
ones, and service
the new tires.
Go to Step 16
2
Is the tire pressure correct?
Go to Step 3
Replace the tires
with specified
ones, and service
the new tires.
Go to Step 16
3
Are the tires free from abnormal wear?
Go to Step 4
Replace the tires
with specified
ones, and service
the new tires.
Go to Step 16
4
Are different types of tires used?
Go to Step 5
Replace the tires
with specified
ones, and service
the new tires.
Go to Step 16
5
1. Start the engine.
2. Shift the transfer lever to the high (TOD) position.
3. Fully turn the steering to the left (or right) end, and select the D
range and start the creep run.
Does the tight corner braking occur? Is the judder with chug-chug
sound observed? * Use caution on the operation.
Go to Step 6
Go to Step 11
6
1. Shift the transfer lever to the 2H position.
2. Fully turn the steering to the left (or right) end, and select the D
range and start the creep run.
Does the tight corner braking occur? Is the judder with chug-chug
sound observed? * Use caution on the operation.
Go to Step 7
Go to Step 14
7
Is an LSD mounted to the rear differential?
Go to Step 8
Go to Step 9
8
Is the genuine LSD oil used in the rear differential?
Go to Step 9
Replace the
differential oil.
Go to Step 16
9
Does the engine output the power correctly?
Go to Step 10
Check the
engine.
Go to Step 16
10
Do the speed sensors work correctly? (Check trouble codes.)
The ECU has
failed. Replace
the ECU.
Go to Step 16
Replace the
speed sensors.
Go to Step 16
11
Is the tight corner braking observed only when the brake is
applied?
Go to Step 12
Conduct full
steering under
WOT.
Go to Step 5
12
1. Turn off the starter switch.
2. Disconnect the ECU connector.
Is the battery voltage observed between terminals (B–68)6 and
(B–67)11?
Go to Step 13
Repair the circuit
of terminal 6
(ABS IN).
Go to Step 16
4B2–89
DRIVE LINE CONTROL SYSTEM (TOD)
Step
No
Yes
Action
13
1. Apply the brake and fully turn the steering to the left (or right)
end, and start the creep run.
Does the voltage between terminals 4 and 20 range between 0.1
and 1.0V?
Repair the
transfer
assembly.
Go to Step 16
The ECU has
failed. Replace
the ECU.
Go to Step 16
14
1. Shift the transfer lever to the high (TOD) position.
2. Fully turn the steering to the left (or right) end, and select the D
range and start the creep run.
Does the voltage between terminals 4 and 20 range between 0.1
and 1.0V?
Go to Step 15
Go to Step 13
15
1. Select the 4WD SW to the 2WD position.
2. Jack up the right front wheel.
Does the front tire rotate smoothly?
Repair the
transfer
assembly.
Go to Step 16
The phenomenon
is not
reproduced.
Refer to
“Troubles
intermittently
observed”.
Go to Step 16
16
Check that all the parts are mounted.
Is this step complete?
Repeat the
“Diagnosis Flow”.
Return to Step 16
*NOTE: Before checking this item, run the vehicle more
than 10 meters with the steering wheel in straight position
so that the 4L mechanical lock sleeve can be released
certainly.
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–90
Chart 2
The 4WD mode is not active.
Function of circuit
—
Fail condition
The rear wheels spin in the TOD mode, so the driving torque is not transmitted to the
front wheels. The indicator lamps will not show the 4L and TOD status.
D04RW057
4B2–91
DRIVE LINE CONTROL SYSTEM (TOD)
Step
Action
Yes
No
1
Is the trouble code 31 or 26 recorded?
Examine the
trouble based on
“Diagnosis from
Trouble Codes”.
Go to Step 7
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 7
Go to Step 3
3
When the transfer lever is in the specified position, do the TOD
indicator lamps show the correct status?
Go to Step 4
Examine the
trouble based on
“Trouble
Diagnosis
Depending on
The Status of
TOD Indicator”.
Go to Step 7
4
Shift the transfer lever to the 4L position, fully turn the steering to
the left (or right) end, and start the creep run. Does the tight
corner braking occur?
Go to Step 5
Repair the
transfer
assembly.
Go to Step 7
5
1. Shift the transfer lever to the high (TOD) position.
2. Turn on the starter switch.
Does the voltage between terminals 4 and 20 indicate at least
0.1V while the throttle is completely open?
Go to Step 6
The ECU has
failed. Replace
the ECU.
Go to Step 7
6
Does the voltage between terminals 4 and 20 indicate at least 3V
while the throttle is completely closed?
The TOD clutch
is worn. Repair
the transfer
assembly.
Go to Step 7
The ECU has
failed. Replace
the ECU.
Go to Step 7
7
Check that all the parts are mounted.
Is this step complete?
Repeat the
“Diagnosis Flow”.
Return to Step 7
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