Opel Frontera UBS. Service manual — part 1978
4B2–59
DRIVE LINE CONTROL SYSTEM (TOD)
Check flow
Trouble code
Phenomenon
Standard
9
31
(P1721)
The electromagnetic coil is broken
or shorted to the battery or GND.
—
D04RY00060
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–60
Step
Action
Yes
No
1
1. Clear the trouble code.
2. Start the engine
3. Set the TOD mode.
Is there DTC31 (P1721)?
Go to
Step 2
Refer to
“Trouble
intermittently
observed”.
2
1. Turn off the starter switch.
2. Disconnect the ECU connector from ECU.
Is the continuity established between terminals (B–67)4 and
(B–67)12?
Go to
Step 3
Go to
Step 5
3
1. Connect the ECU connector.
2. Start the engine.
3. Set the TOD mode.
Does the voltage between terminals 4 and 20 indicate at least
0.4V?
Go to
Step 4
Go to
Step 6
4
Is the battery voltage always observed between terminals 4 and
20?
The harness is
short–circuited on
the battery.
Repair the circuit.
Go to
Step 8
Go to
Step 6
5
1. Disconnect the A–3 connector.
Is the continuity established between transfer connector
terminals (A–3)8 and (A–3)7?
The harness is
broken. Repair
the circuit.
Go to
Step 8
Replace the
transfer
electromagnetic
coil (solenoid
clutch).
Go to
Step 8
6
1. Turn off the starter switch.
2. Disconnect the ECU connector from ECU.
Is the resistance between the connector (B–67) terminal 4 and 12
1.0
∼
5.0
W
?
The ECU has
failed. Replace
the ECU
Go to
Step 8
Go to
Step 7
7
Is the resistance between the transfer connector (A–3) terminal 8
and 7 1.0
∼
5.0
W
?
The harness is
disconnection or
short to GND.
Repair the circuit.
Go to
Step 8
Replace the
transfer
electromagnetic
coil (solenoid
clutch).
Go to
Step 8
8
1. Check that all the parts are mounted.
2. Clear the trouble code.
Is this step complete?
Repeat the
“Diagnosis Flow”.
Return to Step 8
4B2–61
DRIVE LINE CONTROL SYSTEM (TOD)
Check flow
Trouble code
Phenomenon
Standard
10
26
The electromagnetic coil is short-
circuited to GND.
Resistance: 1.0 to 5.0 ohm (at
ordinary temperature)
D04RY00060
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–62
Step
Action
Yes
No
1
1. Turn off the starter switch.
2. Disconnect the ECU connector from ECU.
Does the resistance between terminals (B–67)4 and (B–67)12?
indicate 1.0 to 5.0 ohm?
Go to Step 2
Go to Step 3
2
1. Connect the ECU connector.
2. Start the engine.
3. Set the TOD mode.
When the throttle is operated between full close and full open
positions, does the voltage between terminals 4 and 20 indicate
0.1 to 1.0 V?
The phenomenon
is not
reproduced.
Refer to
“Troubles
intermittently
observed”.
The ECU has
failed. Replace
the ECU.
Go to Step 4
3
Does the resistance between transfer connector terminals (A–3)8
and (A–3)7 indicate 1.0 to 5.0ohm?
The harness is
broken. Repair
the circuit.
Go to Step 4
Replace the
transfer
electromagnetic
coil.
Go to Step 4
4
1. Check that all the parts are mounted.
2. Clear the trouble code.
Is this step complete?
Repeat the
“Diagnosis Flow”.
Return to Step 4
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