OPEL FRONTERA 1998 Workshop Manual

DRIVE LINE CONTROL SYSTEM (TOD) 4B2–88
D04RY00115

4B2–89 DRIVE LINE CONTROL SYSTEM (TOD)
StepActionYe sNo
1When 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 14
2When the transfer lever is shifted to the neutral position, is 0V
observed between terminals 8 and 19 (4H switch)?
Go to Step 3Go to Step 14
3When the transfer lever is shifted to the 4L position, is 5V
observed between terminals 8 and 19 (4H switch)?
Go to Step 4Go to Step 14
41. 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
5Is 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
6Is 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
7Is 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
8Is 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
91. 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
10Is 0 V observed between terminals 26 and 20?
Go to Step 11
The ECU has
failed. Replace
the ECU.
Go to Step 23
11Is 0 V observed between terminals 27 and 20?
Go to Step 12
The ECU has
failed. Replace
the ECU.
Go to Step 23
12Is 12 V observed between terminals 28 and 20?
Go to Step 13
The ECU has
failed. Replace
the ECU.
Go to Step 23
13Is 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
StepNo Ye s Action
141. 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 15Go to Step 17
15When 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 17Go to Step 16
16When 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
171. 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 18Go to Step 20
18When 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 20Go to Step 19
19When 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
201. 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
21When 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
22When 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
23Check 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–14L switch circuit wires are broken or the battery is short-circuited.
Function of circuit—
Fail conditionThe 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 position4LNeutral
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DRIVE LINE CONTROL SYSTEM (TOD) 4B2–92
StepActionYe sNo
1Turn on the starter switch.
When the transfer lever is shifted to the high position, is 5V
observed between terminals 9 and 19 (4L switch)?
Go to Step 2Go to Step 4
2When the transfer lever is shifted to the neutral position, is 0V
observed between terminals 9 and 19 (4L switch)?
Go to Step 3Go to Step 4
3When the transfer lever is shifted to the 4L position, is 0V
observed between terminals 9 and 19 (4L switch)?The ECU has
failed. 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 (B–68)4 and (B–67)11?
Go to Step 5Go to Step 7
5When the transfer lever is shifted to the neutral position, is 0V
observed between terminals (B–68)4 and (B–67)11?
Go to Step 6Go to Step 7
6When the transfer lever is shifted to the 4L position, is 0V
observed between terminals (B–68)4 and (B–67)11?The 4L switch
circuit is
short-circuited on
battery between
ECU and
transfer.Repair
the circuit.
Go to Step 13
Go to Step 7
7Turn off the starter switch.
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 12Go to Step 8
8When 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 9Go to Step 10
9When the transfer lever is shifted to the 4L position, is the
continuity established between terminals (B–68)4 and (B–67)11?The phenomenon
is not
reproduced.
Refer to
“Troubles
intermittently
observed”.
Go to Step 11
101. Disconnect the A–3 connector.
When the transfer lever is shifted to the neutral position between
high and 4L, is the continuity established between transfer
connector terminals (A–3)12 and GND?Wires are broken
between transfer
connector
(A–3)12 and
connector
(B-68)4.Repair
the circuit.
Go to Step 13
Repair the
transfer
assembly.
Go to Step 13
11When the transfer lever is shifted to the 4L position, is the
continuity established between transfer connector terminals
(A–3)12 and GND?Wires are broken
between transfer
connector
(A–3)12 and
connector
(B-68)4.Repair
the circuit.
Go to Step 13
Repair the
transfer
assembly.
Go to Step 13

4B2–93 DRIVE LINE CONTROL SYSTEM (TOD)
StepNo Ye s Action
12When the transfer lever is shifted to the high position, is the
continuity established between transfer connector terminals
(A–3)12 and GND?
Repair the
transfer
assembly.
Go to Step 13
Wires are broken
between transfer
connector
(A–3)12 and
connector
(B-68)4.Repair
the circuit.
Go to Step 13
13Check that all the parts are mounted.
Is this step complete?Repeat the
“Diagnosis Flow”.
Return to Step 13

DRIVE LINE CONTROL SYSTEM (TOD) 4B2–94
Chart D–2The 4L switch circuit is short-circuited to GND.
Function of circuit—
Fail conditionThe 4L mode is displayed even in the 2H or TOD.
Indicator lamp status
Transfer positionHIGH (2H or TOD)
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4B2–95 DRIVE LINE CONTROL SYSTEM (TOD)
D04RY00065

DRIVE LINE CONTROL SYSTEM (TOD) 4B2–96
StepActionYe sNo
1When the transfer lever is shifted to the high position, is 5V
observed between terminals 9 and 19 (4L switch)?
Go to Step 2Go to Step 7
2When the transfer lever is shifted to the neutral position, is 0V
observed between terminals 9 and 19 (4L switch)?
Go to Step 3Go to Step 7
3When the transfer lever is shifted to the 4L position, is 0V
observed between terminals 9 and 19 (4L switch)?
Go to Step 4Go to Step 7
41. 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
5Is 12V observed between terminals 26 and 19?
Go to Step 6
The ECU has
failed. Replace
the ECU.
Go to Step 16
6Is 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
71. 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 8Go to Step 10
8When 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 9Go to Step 10
9When 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
101. 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 11Go to Step 13
11When 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 12Go to Step 13
12When 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
131. 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
14When 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

4B2–97 DRIVE LINE CONTROL SYSTEM (TOD)
StepNo Ye s Action
15When the transfer lever is shifted to the high position, is the
continuity established between terminals (A-3)12 and GND?
Repair the
transfer
assembly.
Go to Step 16
GND is
short-circuited
between
terminals (H–49)5
and (A-3)12.
Repair the circuit.
Go to Step 16
16Check that all the parts are mounted.
Is this step complete?Repeat the
“Diagnosis Flow”.
Return to Step 16