Opel Frontera UBS. Manual - part 157
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–80
Step
Action
Yes
No
1
Start 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 2
Go to Step 7
2
When the transfer lever is shifted to the high position and 4WD
switch shifted to 4WD position, is 0V observed between terminals
10 and 19?
Go to Step 3
Go to Step 7
3
When the transfer lever is shifted to the 4L position, is 0V
observed between terminals 10 and 19?
Go to Step 4
Go to Step 7
4
Select the 4WD SW to the 2WD position.
Is 12V observed between terminals 25 and 19?
Go to Step 5
Go to Step 19
5
Is 12V observed between terminals 26 and 19?
Go to Step 6
Go to Step 19
6
Is 12V observed between terminals 27 and 19?
The phenomenon
is not
reproduced.
Refer to
“Troubles
intermittently
observed”.
Go to Step 19
The ECU has
failed. Replace
the ECU.
Go to Step 19
7
When the 4WD SW is select to the 2WD position, is the battery
voltage observed between terminals 5 and 19?
Go to Step 8
Go to Step 11
8
When 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 9
Go to Step 11
9
When the transfer lever is shifted to the high position and 4WD
switch shifted to 4WD position, is 0V observed between terminals
5 and 19?
Go to Step 10
Go to Step 11
10
When the transfer lever is shifted to the 4L position, is 0V
observed between terminals 5 and 19?
Go to Step 12
Go to Step 11
11
Is any of the trouble codes 28, 32 and 33 recorded?
Examine the
trouble based on
“Diagnosis from
Trouble Codes”.
Go to Step 19
The ECU has
failed. Replace
the ECU.
Go to Step 19
12
1. 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
13
1. Connect the ECU connector.
2. Turn on the starter switch.
When the 4WD SW is select 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
14
When 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
15
When the transfer lever is shifted to the high position and 4WD
switch shifted to 4WD position, is 0V observed on each VSV?
Go to Step 16
Repair the circuit
or replace the
VSV.
Go to Step 19