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Opel Frontera UBS. Manual - part 1039
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–96
Step
Action
Yes
No
1
When the transfer lever is shifted to the high position, is 5V
observed between terminals 9 and 19 (4L switch)?
Go to Step 2
Go to Step 7
2
When the transfer lever is shifted to the neutral position, is 0V
observed between terminals 9 and 19 (4L switch)?
Go to Step 3
Go to Step 7
3
When the transfer lever is shifted to the 4L position, is 0V
observed between terminals 9 and 19 (4L switch)?
Go to Step 4
Go to Step 7
4
1. Shift the 4WD AUTO SW to the 2H position.
Is 12V observed between terminals 25 and 19?
Go to Step 5
The ECU has
failed. Replace
the ECU.
Go to Step 16
5
Is 12V observed between terminals 26 and 19?
Go to Step 6
The ECU has
failed. Replace
the ECU.
Go to Step 16
6
Is 12V 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 16
7
1. Turn off the starter switch.
2. Disconnect the ECU connector.
When the transfer lever is shifted to the neutral position between
High and 4L, is the continuity established between terminals
(B–68)4 and (B–67)11?
Go to Step 8
Go to Step 10
8
When the transfer lever is shifted to the 4L position, is the
continuity established between terminals (B–68)4 and (B–67)11?
Go to Step 9
Go to Step 10
9
When the transfer lever is shifted to the high position, is the
continuity established between terminals (B–68)4 and (B–67)11?
Go to Step 10
The ECU has
failed. Replace
the ECU.
Go to Step 16
10
1. Disconnect the H-49 connector.
When the transfer lever is shifted to the neutral position between
high and 4L, is the continuity established between terminals
(H-49)5 and (B-67)11?
Go to Step 11
Go to Step 13
11
When the transfer lever is shifted to the 4L position, is the
continuity established between transfer connector terminals
(H-49)5 and (B-67)11?
Go to Step 12
Go to Step 13
12
When the transfer lever is shifted to the high position, is the
continuity established between terminals (H-49)5 and (B-67)11?
Go to Step 13
GND is
short-circuited
between
terminals (B–68)4
and (H-49)5.
Repair the circuit.
Go to Step 16
13
1. Disconnect the A-3 connector.
When the transfer lever is shifted to the neutral position between
high and 4L, is the continuity established between terminals
(A-3)12 and GND?
Go to Step 14
Repair the
transfer
assembly.
Go to Step 16
14
When the transfer lever is shifted to the 4L position, is the
continuity established between terminals (A-3)12 and GND?
Go to Step 15
Repair the
transfer
assembly.
Go to Step 16