OPEL FRONTERA 1998 Workshop Manual

DRIVE LINE CONTROL SYSTEM (TOD) 4B2–98
Chart E–1AXLE switch circuit wires are broken.
Function of circuit—
Fail conditionBoth the TOD and 4L modes are disabled. (The transition status is not removed.)
Indicator lamp status
Transfer positionTOD4L
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4B2–99 DRIVE LINE CONTROL SYSTEM (TOD)
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DRIVE LINE CONTROL SYSTEM (TOD) 4B2–100
D04RY00070

4B2–101 DRIVE LINE CONTROL SYSTEM (TOD)
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DRIVE LINE CONTROL SYSTEM (TOD) 4B2–102
StepActionYe sNo
1Start the engine.
When the transfer lever is shifted to the neutral position between
high and 4L, is 5V observed between terminals 10 and 19?
Go to Step 2Go to Step 7
2When the transfer lever is shifted to the high position and 4WD
AUTO SW is selected to the 4WD position, is 0V observed
between terminals 10 and 19?
Go to Step 3Go to Step 7
3When the transfer lever is shifted to the 4L position, is 0V
observed between terminals 10 and 19?The ECU has
failed. Replace
the ECU.
Go to Step 4
Go to Step 7
4Shift the transfer lever to the 4L position.
Is 0V observed between terminals 25 and 19?
Go to Step 5
The ECU has
failed. Replace
the ECU.
Go to Step 19
5Is 0V observed between terminals 26 and 19?
Go to Step 6
The ECU has
failed. Replace
the ECU.
Go to Step 19
6Is 0V observed between terminals 27 and 19?The phenomenon
is not
reproduced.
Refer to
“Troubles
intermittently
observed”.
The ECU has
failed. Replace
the ECU.
Go to Step 19
7When the transfer lever is shifted to the high position and 4WD
AUTO SW is selected to the 2H position, is the battery voltage
observed between terminals 5 and 19?
Go to Step 8Go to Step 11
8When the transfer lever is shifted to the neutral position between
high and 4L, is the battery voltage observed between terminals 5
and 19?
Go to Step 9Go to Step 11
9When the transfer lever is shifted to the high position and 4WD
AUTO SW is selected to the 4WD position (TOD mode), is 0V
observed between terminals 5 and 19?
Go to Step 10Go to Step 11
10When the transfer lever is shifted to the 4L position, is 0V
observed between terminals 5 and 19?
Go to Step 12Go to Step 11
11Is any of the trouble codes 28, 32 and 33 recorded?Examine the
trouble based on
“Diagnosis from
Trouble Codes”.
The ECU has
failed. Replace
the ECU.
121. Turn off the starter switch.
2. Disconnect the ECU connector.
Does the resistance between terminals (B–67)5 and (B–67)11
meet the standard, 17< R < 25 ohm?
Go to Step 13
Repair the circuit
or replace the
VSV.
Go to Step 19
131. Turn on the starter switch.
When the 4WD AUTO SW is selected to the 2WD position, is the
battery voltage supplied to each VSV?
Go to Step 14
Repair the circuit
or replace the
VSV.
Go to Step 19
14When the transfer lever is shifted to the neutral position between
high and 4L, is the battery voltage supplied to each VSV?
Go to Step 15
Repair the circuit
or replace the
VSV.
Go to Step 19

4B2–103 DRIVE LINE CONTROL SYSTEM (TOD)
StepNo Ye s Action
15When the transfer lever is shifted to the high position and 4WD
AUTO SW is selected to the 4WD position, is 0V observed on
each VSV?
Go to Step 16
Repair the circuit
or replace the
VSV.
Go to Step 19
16When the transfer lever is shifted to the 4L position, is 0V
observed on each VSV?
Go to Step 17
Repair the circuit
or replace the
VSV.
Go to Step 19
17Is the vacuum pressure supplied to the VSV?
Go to Step 18
Repair the
vacuum system.
Go to Step 19
18Can the single AXLE switch enable and disable the continuity?
Repair the shift
on the fly system
(refer to Section
4B1 and 4C.)
Replace the
AXLE switch
(refer to Section
4B1 and 4C of
Chassis Repair
Manual).
19Check that all the parts are mounted.
Is this step complete?Repeat the
“Diagnosis Flow”.
Return to Step 19

DRIVE LINE CONTROL SYSTEM (TOD) 4B2–104
Chart E–2The AXLE switch circuit is short-circuited to GND.
Function of circuit—
Fail conditionEven after the 4WD AUTO SW is select to the 2WD position, the 2WD mode is not
enabled. (The transition status is not removed.)
Indicator lamp status
Transfer position2H
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4B2–105 DRIVE LINE CONTROL SYSTEM (TOD)
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DRIVE LINE CONTROL SYSTEM (TOD) 4B2–106
D04RY00070

4B2–107 DRIVE LINE CONTROL SYSTEM (TOD)
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