OPEL FRONTERA 1998 Workshop Manual

DRIVE LINE CONTROL SYSTEM (TOD) 4B2–68
StepActionYe sNo
11. Turn off the starter switch.
2. Disconnect the ECU connector from ECU.
Is the continuity established between terminals (B–67)5 and
(B–67)11?
Go to Step 2
The harness is
broken. Repair
the circuit.
Go to Step 3
2Does the voltage between terminals (B–67) 5 and (B–67) 11
indicate 0V?
Go to Step 3
The battery is
short-circuited.
Repair the circuit.
Go to Step 4
31. Turn off the starter switch.
2. Connect ECU connector.
3. Turn on the starter switch.
4. Set the transfer to the 2H mode.
Is the battery voltage observed between terminals 5 and 19?The phenomenon
is not reproduced
Refer to
“Troubles
intermittently
observed”.
The ECU has
failed. Replace
the ECU.
Go to Step 4
41. Check that all the parts are mounted.
2. Clear the trouble code.
Is this step complete?
Repeat the
“Diagnosis Flow”.
Return to Step 4

4B2–69 DRIVE LINE CONTROL SYSTEM (TOD)
Check flowTrouble codePhenomenonStandard
1333
(P1762)The ADC line is short-circuited to
GND.—
NOTE:
The on/off signal line of the shift on the fly system is
short–circuited to GND.
The system enters into the fail-safe mode because of
fusing or system protection.
(If a short–circuit is observed on GND, the output to
the on/off signal line becomes 0V.)
D04RY00061

DRIVE LINE CONTROL SYSTEM (TOD) 4B2–70
D04RY00062

4B2–71 DRIVE LINE CONTROL SYSTEM (TOD)
StepActionYe sNo
11. Turn off the starter switch.
2. Disconnect the ECU connector from ECU.
Does the resistance between terminals (B–67) 5 and (B–67) 11
meet the standard, 17<R<25 ohms?The phenomenon
is not
reproduced.
Refer to
“Troubles
intermittently
observed”.
Go to Step 2
2Is the resistance between terminals (B–67) 5 and (B–67) 11 R<2
ohms?The signal line
circuit of the shift
on the fly system
is short-circuited
to GND. Repair
the circuit.
Go to Step 4
Go to Step 3
3Is the resistance between terminals (B–67) 5 and (B–67) 11 R=
9
7ohms?
The signal line
circuit of the shift
on the fly system
is layer
short-circuited*.
Replace the valve
(VSV).
Go to Step 4
Go to Step 4
41. Check that all the parts are mounted.
2. Clear the trouble code.
Is this step complete?
Repeat the
“Diagnosis Flow”.
Return to Step 4
*Layer short-circuit : The coil is damaged by overcurrent.

DRIVE LINE CONTROL SYSTEM (TOD) 4B2–72
Check flowTrouble codePhenomenonStandard
1425The CHECK lamp indicator line is
short–circuited to the battery.—
35The line is broken or short–circuited
to GND.—
D04RY00063

4B2–73 DRIVE LINE CONTROL SYSTEM (TOD)
StepActionYe sNo
11. Turn on the starter switch.
Is the CHECK lamp always turned on?
Go to Step 2Go to Step 3
21. Turn off the starter switch.
2. Disconnect the ECU connector.
3. Turn on the starter switch.
Is the CHECK lamp always turned on?The CHECK
circuit is
short-circuited to
GND. Repair the
circuit.
Go to Step 7
The ECU has
failed. Replace
the ECU.
Go to Step 7
3Turn on the starter switch.
Is the CHECK lamp always turned off?
Go to Step 4Go to Step 6
4Turn on the starter switch.
Is the battery voltage observed between terminals 30 and 19?
Go to Step 5
The CHECK
circuit wires are
broken or the
CHECK lamp is
failed. Repair the
circuit.
Go to Step 7
5Turn off the starter switch.
Is the battery voltage observed between terminals 30 and 19?The battery is
short–circuited.
Repair the
CHECK lamp
circuit.
Go to Step 7
The ECU has
failed. Replace
the ECU.
Go to Step 7
6Turn on the starter switch.
Does the CHECK lamp go off two seconds after?The phenomenon
is not
reproduced.Refer
to “Troubles
intermittently
observed”.
Go to Step 7
71. Check that all the parts are mounted.
2. Clear the trouble code.
Is this step complete?
Repeat the
“Diagnosis Flow”.
Return to Step 7

DRIVE LINE CONTROL SYSTEM (TOD) 4B2–74
Trouble Diagnosis Depending on The
Status of TOD Indicator
Functional check with TOD indicator light is conducted
prior to check on Charts A–H.
After the starter is switched on, check and see if the
status has become as tabulated below.
C07RW012–1
If the status is as tabulated above, there is no
problem. If not as tabulated above, inspect the
harness.

4B2–75 DRIVE LINE CONTROL SYSTEM (TOD)
Chart AIndicator drive circuit
Function of circuitThe circuit informs the indicator of the working condition of the ECU.
Fail conditionAll the TOD indicator lamps and CHECK lamp are lit, and go off momentarily at an
interval of about two seconds.
Indicator lamp status
—
Transfer position2H, TOD, 4L—
D04RY00114

DRIVE LINE CONTROL SYSTEM (TOD) 4B2–76
D04RY00115
StepActionYe sNo
1Turn on the starter switch.
Is the battery voltage observed between terminals 1 and 19?The ECU has
failed. Replace
the ECU.
Go to Step 2
Check the battery
circuit.
Go to Step 2
2Check that all the parts are mounted.
Is this step complete?Repeat the
“Diagnosis Flow”.
Return to Step 2

4B2–77 DRIVE LINE CONTROL SYSTEM (TOD)
Chart B–1The 4WD AUTO switch circuit wires are broken or short-circuited to the GND
Function of circuit—
Fail conditionEven after the transfer mode is selected from TOD to 2H, the indicator lamp status is not
changed.
Indicator lamp status
—
Transfer position2H—
D04RY00114