oil OPEL FRONTERA 1998 Repair Manual

4B2–5 DRIVE LINE CONTROL SYSTEM (TOD)
Front and Rear Speed Sensors
The sensors are built in the transfer case, detect the
rotation of rotors directly coupled to the propeller shafts.
Thirty rectangular pulses are output per one rotation of
the propeller shaft.
261RW045
Electromagnetic Coil
Receives the duty signals from the TOD control unit and
controls the pressing force of the clutch pressure cam.
261RW044
Multi Plate Disk Clutch Pack
Transmits the torque determined by the clutch pressing
force to the front propeller shaft via the front drive chain.
262RW029
Mechanical Lock Sleeve
Couples the front and rear propeller shaft mechanically
when the transfer shaft is in the 4L position.
262RW028

DRIVE LINE CONTROL SYSTEM (TOD) 4B2–6
High-Low Planetary Gear Set
Establishes an auxiliary transmission mechanism. When
the transfer shift lever is set to the 2H or TOD position, the
reduction gear ratio is 1.000 and the corresponding
driving force is generated. When the transfer shift lever is
set to the 4L position, the reduction gear ratio is 2.480 and
the corresponding driving force is generated.
262RW030
4H and 4L Switches
Detects the shift position of the transfer from the
movement of the transfer lever and outputs signals to the
TOD control unit.
261RW002
Transfer Connector
Transmits the input and output signals of the speed
sensors, electromagnetic coil, and 4H and 4L switches to
the vehicle harness. A waterproof 12-pin type is used.
261RW046
TOD Indicator Lamps (on the instrument
panel)
Inform the following items.
Bulb check
Drive mode
ABS IN status
BRAKE ON status
821RW049

DRIVE LINE CONTROL SYSTEM (TOD) 4B2–30
Diagnostic Trouble Codes
CodeItemDiagnosisCheck flow No.
12Start codeNormal—
13RefShorted GND6
14Front speed sensorInput abnormality (open, sig or com)2
15RefShorted VB6
16Front speed sensorInput abnormality3
21TPSShorted or disconnected wiring, abnormality in
input7
23ECUCPU abnormality1
24Rear speed sensorInput abnormality (open, sig or com)5
25CHECK lampShorted14
26EMC (+)Shorted GND10
27Rear speed sensorInput abnormality4
28ADC (+) & AXLE SWOutput abnormality11
31EMC (+)Shorted or disconnected coil/wiring9
32ADC (+)Shorted or disconnected coil/wiring12
33ADC (+)Shorted GND13
34D-G MAPInput abnormality8
35CHECK lampShorted or disconnected wiring14
36ECUCPU abnormality1
37ECUCPU abnormality1
38ECUCPU abnormality1
TPS : Throttle Position Sensor
EMC : Electromagnetic coil
ADC : Shift on the fly (Axle Dis Connect)
D-G MAP : Discrimination engine type

DRIVE LINE CONTROL SYSTEM (TOD) 4B2–46
Check flowTrouble codePhenomenonStandard
931The electromagnetic coil is broken.—
D04RW060

4B2–47 DRIVE LINE CONTROL SYSTEM (TOD)
StepActionYe sNo
11. 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 2Go to Step 4
21. 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 3
The ECU has
failed. Replace
the ECU.
Go to Step 5
3Is the battery voltage always observed between terminals 4 and
20?
The harness is
short–circuited on
the battery.
Repair the circuit.
Go to Step 5
The phenomenon
is not
reproduced.
Refer to
“Troubles
intermittently
observed”.
Go to Step 5
41. Disconnect the M–27 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 5
Replace the
transfer
electromagnetic
coil (solenoid
clutch).
Go to Step 5
51. Check that all the parts are mounted.
2. Clear the trouble code.
Is this step complete?
Repeat the
“Diagnosis Flow”.
Return to Step 5

DRIVE LINE CONTROL SYSTEM (TOD) 4B2–48
Check flowTrouble codePhenomenonStandard
1026The electromagnetic coil GND is
short-circuited.Resistance: 1.0 to 5.0 ohm (at ordi-
nary temperature)
D04RW060

4B2–49 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)4 and (B–67)12?
indicate 1.0 to 5.0 ohm?
Go to Step 2Go to Step 3
21. 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 a t
least 0.1 to 1.0 V?The phenomenon
is not
reproduced.
Refer to
“Troubles
intermittently
observed”.
Go to Step 4
The ECU has
failed. Replace
the ECU.
Go to Step 4
3Does 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
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

4B2–55 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 5 and 19 meet the
standard, R = 21
4 ohms?
The phenomenon
is not
reproduced.
Refer to
“Troubles
intermittently
observed”.
Go to Step 4
Go to Step 2
2Is the resistance between terminals 5 and 19 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 3
Go to Step 3
3Is the resistance between terminals 5 and 19 R= 97ohms?The signal line
circuit of the shift
on the fly system
is layer
short-circuited*.
Replace the valve
(VSV).
Go to Step 3
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) 4B2–88
StepActionYe sNo
1Are the front and rear tires in specified size?
Go to Step 2
Replace the tires
with specified
ones, and service
the new tires.
Go to Step 16
2Is the tire pressure correct?
Go to Step 3
Replace the tires
with specified
ones, and service
the new tires.
Go to Step 16
3Are the tires free from abnormal wear?
Go to Step 4
Replace the tires
with specified
ones, and service
the new tires.
Go to Step 16
4Are different types of tires used?
Go to Step 5
Replace the tires
with specified
ones, and service
the new tires.
Go to Step 16
51. Start the engine.
2. Shift the transfer lever to the high (TOD) position.
3. Fully turn the steering to the left (or right) end, and select the D
range and start the creep run.
Does the tight corner braking occur? Is the judder with chug-chug
sound observed? * Use caution on the operation.
Go to Step 6 Go to Step 11
61. Shift the transfer lever to the 2H position.
2. Fully turn the steering to the left (or right) end, and select the D
range and start the creep run.
Does the tight corner braking occur? Is the judder with chug-chug
sound observed? * Use caution on the operation.
Go to Step 7 Go to Step 14
7Is an LSD mounted to the rear differential? Go to Step 8 Go to Step 9
8Is the genuine LSD oil used in the rear differential?
Go to Step 9
Replace the
differential oil.
Go to Step 16
9Does the engine output the power correctly?
Go to Step 10
Check the
engine.
Go to Step 16
10Do the speed sensors work correctly? (Check trouble codes.)The ECU has
failed. Replace
the ECU.
Go to Step 16
Replace the
speed sensors.
Go to Step 16
11Is the tight corner braking observed only when the brake is
applied?
Go to Step 12
Conduct full
steering under
WOT.
Go to Step 5
121. Turn off the starter switch.
2. Disconnect the ECU connector.
Is the battery voltage observed between terminals (B–68)6 and
(B–67)11?
Go to Step 13
Repair the circuit
of terminal 6
(ABS IN).
Go to Step 16

4C–1 DRIVE SHAFT SYSTEM
DRIVELINE/AXLE
DRIVE SHAFT SYSTEM
CONTENTS
Service Precaution 4C–2. . . . . . . . . . . . . . . . . . . . . .
General Description 4C–2. . . . . . . . . . . . . . . . . . . . .
Diagnosis 4C–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Axle Shaft 4C–4. . . . . . . . . . . . . . . . . . . . . . . . .
Rear Axle Shaft and Associated Parts 4C–4. . . .
Removal 4C–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 4C–5. . . . . . . . . . . . . . . . . .
Oil Seal Replacement 4C–6. . . . . . . . . . . . . . . . . .
Installation 4C–6. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Tools 4C–8. . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Hub and Disc (with Shift on the Fly) 4C–9. .
Disassembled View 4C–9. . . . . . . . . . . . . . . . . . . .
Disassembly 4C–9. . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 4C–10. . . . . . . . . . . . . . . . . .
Reassembly 4C–11. . . . . . . . . . . . . . . . . . . . . . . . . .
Front Hub and Disc with Manual Locking Hub 4C–14
Disassembled View 4C–14. . . . . . . . . . . . . . . . . . . .
Disassembly 4C–14. . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 4C–16. . . . . . . . . . . . . . . . . .
Reassembly 4C–16. . . . . . . . . . . . . . . . . . . . . . . . . .
Main Data and Specifications 4C–20. . . . . . . . . . . . .
Special Tools 4C–21. . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Drive Shaft Joint 4C–22. . . . . . . . . . . . . . . . . . .
Front Drive Shaft Joints Replacement 4C–22. . . .
Front Axle Drive Shaft 4C–23. . . . . . . . . . . . . . . . . . .
Front Axle Drive Shaft and Associated
Parts 4C–23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly 4C–24. . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 4C–25. . . . . . . . . . . . . . . . . .
Bushing Replacement 4C–25. . . . . . . . . . . . . . . . . . Reassembly 4C–26. . . . . . . . . . . . . . . . . . . . . . . . . .
Shift On The Fly System 4C–28. . . . . . . . . . . . . . . . .
Shift On The Fly System and Associated
Parts 4C–28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly 4C–28. . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 4C–30. . . . . . . . . . . . . . . . . .
Main Data and Specifications 4C–35. . . . . . . . . . .
Special Tools 4C–36. . . . . . . . . . . . . . . . . . . . . . . . . .
Front Propeller Shaft 4C–37. . . . . . . . . . . . . . . . . . . . .
General Description 4C–37. . . . . . . . . . . . . . . . . . . . .
Front Propeller Shaft and Associated Parts 4C–38
Removal 4C–38. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 4C–39. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly (Except TOD 4
4) 4C–40. . . . . . . . .
Universal Joint Disassembly 4C–41. . . . . . . . . . . .
Inspection and Repair 4C–42. . . . . . . . . . . . . . . . . .
Universal Joint Reassembly 4C–45. . . . . . . . . . . . .
Reassembly (Except TOD 4
4) 4C–46. . . . . . . . . .
Main Data and Specifications 4C–47. . . . . . . . . . .
Rear Propeller Shaft 4C–48. . . . . . . . . . . . . . . . . . . . .
General Description 4C–48. . . . . . . . . . . . . . . . . . . . .
Rear Propeller Shaft and Associated Parts 4C–48
Removal 4C–49. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 4C–49. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly 4C–50. . . . . . . . . . . . . . . . . . . . . . . . . .
Universal Joint Disassembly 4C–51. . . . . . . . . . . .
Inspection and Repair 4C–52. . . . . . . . . . . . . . . . . .
Universal Joint Reassembly 4C–53. . . . . . . . . . . . .
Reassembly 4C–54. . . . . . . . . . . . . . . . . . . . . . . . . .
Main Data and Specifications 4C–55. . . . . . . . . . .