1998 OPEL FRONTERA Workshop Manual

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Page 4161 of 6000

OPEL FRONTERA 1998 Workshop Manual DRIVE LINE CONTROL SYSTEM (TOD) 4B2–78
D04RY00115

Page 4162 of 6000

OPEL FRONTERA 1998 Workshop Manual 4B2–79 DRIVE LINE CONTROL SYSTEM (TOD)
StepActionYe sNo
11. Turn on the starter switch.
When the 4WD SW is selected to the 4WD position, is 0 V
observed between terminal 12 and 19?
Go to

Page 4163 of 6000

OPEL FRONTERA 1998 Workshop Manual DRIVE LINE CONTROL SYSTEM (TOD) 4B2–80
Chart B–2The 4WD AUTO switch circuit is short to battery.
Function of circuit—
Fail conditionEven after the transfer mode is selected from 2H to TOD, the i

Page 4164 of 6000

OPEL FRONTERA 1998 Workshop Manual 4B2–81 DRIVE LINE CONTROL SYSTEM (TOD)
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OPEL FRONTERA 1998 Workshop Manual DRIVE LINE CONTROL SYSTEM (TOD) 4B2–82
StepActionYe sNo
1When the 4WD AUTO SW is selected to the 4WD position, is 0 V
observed between terminal 12 and 19?
Go to Step 2
Repair the 4WD
AUTO SW circuit

Page 4166 of 6000

OPEL FRONTERA 1998 Workshop Manual 4B2–83 DRIVE LINE CONTROL SYSTEM (TOD)
Chart C–14H switch circuit wires are broken or the battery is short-circuited.
Function of circuit—
Fail conditionWhen the 4WD AUTO SW is 4WD mode.
When th

Page 4167 of 6000

OPEL FRONTERA 1998 Workshop Manual DRIVE LINE CONTROL SYSTEM (TOD) 4B2–84
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Page 4168 of 6000

OPEL FRONTERA 1998 Workshop Manual 4B2–85 DRIVE LINE CONTROL SYSTEM (TOD)
StepActionYe sNo
11. Turn on the starter switch.
When the transfer lever is shifted to the high position, is 5V
observed between terminals 8 and 19

4B2–85 DRIVE LINE CONTROL SYSTEM (TOD)
StepActionYe sNo
11. Turn on the starter switch.
When the transfer lever is shifted to the high position, is 5V
observed between terminals 8 and 19 (4H switch)?
Go to Step 2Go to Step 4
2When the transfer lever is shifted to the 4L position, is 5V
observed between terminals 8 and 19 (4H switch)?
Go to Step 3Go to Step 4
3When the transfer lever is shifted to the neutral position, is 0V
observed between terminals 8 and 19 (4H switch)?Replace the
ECU.
Go to Step 13
Go to Step 4
41. Turn off the starter switch.
2. Disconnect the ECU connector.
3. Turn on the starter switch.
When the transfer lever is shifted to the high position, is 12V
observed between terminals 8 and 19 (4H switch)?
Go to Step 5Go to Step 7
5When the transfer lever is shifted to the neutral position, is 0V
observed between terminals 8 and 19 (4H switch)?
Go to Step 6Go to Step 7
6When the transfer lever is shifted to the 4L position, is 12V
observed between terminals 8 and 19 (4H switch)?The 4H switch
circuit is
short-circuited
between ECU
and transfer on
battery.Repair the
circuit.
Go to Step 13
Go to Step 7
7Turn off the starter switch.
When the transfer lever is shifted to the neutral position, is the
continuity established between terminals 8 and 19 (4H switch)?
Go to Step 8Go to Step 10
8When the transfer lever is shifted to the high position, is the
continuity established between terminals 8 and 19?
Go to Step 11Go to Step 9
9When the transfer lever is shifted to the 4L position, is the
continuity established between terminals 8 and 19?
Go to Step 12
The ECU has
failed.
Replace the
ECU.
Go to Step 13
10When the transfer lever is shifted to the neutral position, is the
continuity established between terminals (A–3)4 and (A–3)7?The 4H switch
circuit is broken
between ECU
and
transfer.Repair
the circuit.
Go to Step 13
Repair the
transfer
assembly.
Go to Step 13
11When the transfer lever is shifted to the high position, is the
continuity established between transfer connector terminals
(A–3)4 and (A–3)7?Repair the
transfer
assembly.
Go to Step 13
Repair the 4HSW
circuit.
Go to Step 13
12When the transfer lever is shifted to the 4L position, is the
continuity established between transfer connector terminals
(A–3)7 and (A–3)4?Repair the
transfer
assembly.
Go to Step 13
Repair the 4H
SW circuit.
Go to Step 13

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