Opel Frontera UBS. Service manual — part 1037
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–88
D04RY00115
4B2–89
DRIVE LINE CONTROL SYSTEM (TOD)
Step
Action
Yes
No
1
When the transfer lever is shifted to the High position, is 5V
observed between terminals 8 and 19 (4H switch)?
Go to Step 2
Go to Step 14
2
When the transfer lever is shifted to the neutral position, is 0V
observed between terminals 8 and 19 (4H switch)?
Go to Step 3
Go to Step 14
3
When the transfer lever is shifted to the 4L position, is 5V
observed between terminals 8 and 19 (4H switch)?
Go to Step 4
Go to Step 14
4
1. Turn off the starter switch.
Is the continuity established between terminals 1 and 25?
Go to Step 5
Replace TOD
indicator lamp
bulb, or repair the
circuit.
Go to Step 23
5
Is the continuity established between terminals 1 and 26?
Go to Step 6
Replace TOD
indicator lamp
bulb, or repair the
circuit.
Go to Step 23
6
Is the continuity established between terminals 1 and 27?
Go to Step 7
Replace TOD
indicator lamp
bulb, or repair the
circuit.
Go to Step 23
7
Is the continuity established between terminals 1 and 28?
Go to Step 8
Replace TOD
indicator lamp
bulb, or repair the
circuit.
Go to Step 23
8
Is the continuity established between terminals 1 and 29?
Go to Step 9
Replace TOD
indicator lamp
bulb, or repair the
circuit.
Go to Step 23
9
1. Turn on the starter switch.
2. Shift the transfer lever is shifted to the 4L position.
Is 0 V observed between terminals 25 and 20?
Go to Step 10
The ECU has
failed. Replace
the ECU.
Go to Step 23
10
Is 0 V observed between terminals 26 and 20?
Go to Step 11
The ECU has
failed. Replace
the ECU.
Go to Step 23
11
Is 0 V observed between terminals 27 and 20?
Go to Step 12
The ECU has
failed. Replace
the ECU.
Go to Step 23
12
Is 12 V observed between terminals 28 and 20?
Go to Step 13
The ECU has
failed. Replace
the ECU.
Go to Step 23
13
Is 0 V observed between terminals 29 and 20?
The phenomenon
is not
reproduced.
Refer to
“Troubles
intermittently
observed”.
The ECU has
failed. Replace
the ECU.
Go to Step 23
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–90
Step
No
Yes
Action
14
1. Turn off the starter switch.
2. Disconnect the ECU connector.
When the transfer lever is shifted to the neutral position, is the
continuity established between terminals (B–68)3 and (B–67)11
(4H switch)?
Go to Step 15
Go to Step 17
15
When the transfer lever is shifted to the high position, is the
continuity established between terminals (B–68)3 and (B–67)11?
Go to Step 17
Go to Step 16
16
When the transfer lever is shifted to the 4L position, is the
continuity established between terminals (B–68)3 and (B–67)11?
Go to Step 17
The ECU has
failed. Replace
the ECU.
Go to Step 23
17
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)6 and (B-67)11?
Go to Step 18
Go to Step 20
18
When the transfer lever is shifted to the high position, is the
continuity established between transfer connector terminals
(H-49)6 and (B-67)11?
Go to Step 20
Go to Step 19
19
When the transfer lever is shifted to the 4L position, is the
continuity established between transfer connector terminals
(H-49)6 and (B-67)11?
Go to Step 20
GND is
short-circuited
between
terminals (B-68)3
and (H-49)6.
Repair the circuit.
Go to Step 23
20
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)4 and (A-3)7?
Go to Step 21
Repair the
transfer
assembly.
Go to Step 23
21
When the transfer lever is shifted to the high position, is the
continuity established between terminals (A-3)4 and (A-3)7?
Repair the
transfer
assembly.
Go to Step 23
Go to Step 22
22
When the transfer lever is shifted to the 4L position, is the
continuity established between terminals (A-3)4 and (A-3)7?
Repair the
transfer
assembly.
Go to Step 23
GND is
short-circuited
between
terminals (B-68)3
and (A–3)4.
Repair the circuit.
Go to Step 23
23
Check that all the parts are mounted.
Is this step complete?
Repeat the
“Diagnosis Flow”.
Return to Step 23
4B2–91
DRIVE LINE CONTROL SYSTEM (TOD)
Chart D–1
4L switch circuit wires are broken or the battery is short-circuited.
Function of circuit
—
Fail condition
The TOD mode is displayed in the neutral position between high and 4L. When the lever
is shifted to the 4L position, the TOD mode is displayed.
Indicator lamp status
Transfer position
4L
Neutral
D04RY00054
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