2002 ISUZU AXIOM ESP

4B2±43
DRIVE LINE CONTROL SYSTEM (TOD)
Check flowTrouble codePhenomenonStandard
527The rear speed sensor no pulse.Hi level : 4.5 ~ 6.0 V
Lo level : 0.7 ~ 2.0 V
P1738Frequency (F) =
700-850 Hz (at 50 km/h or 31 mph)
NOTE: Find the trouble in which the pulse corresponding
to the running speed is not input.
D04R200005

4B2±51
DRIVE LINE CONTROL SYSTEM (TOD)
StepActionYe sNo
1Is the TOD control unit the regular part? (Verity the part number.)
Go to Step 2
Replace with the
regular part.
Go to
Step 2
21. Turn on the starter switch.
Does the voltage between the terminal 28 and 47 accord with the
table 1 corresponding to the AT selector positions?
Go to Step 3Go to Step 5
3Does the voltage between the terminal 41 and 47 accord with the
table 1 corresponding to the AT selector positions?
Go to Step 4Go to Step 6
4Does the voltage between the terminal 27 and 47 accord with the
table 1 corresponding to the AT selector positions?Refer to ªTrouble
intermittently
observedº.
Go to Step 7
51. Disconnect the AT mode connector (E±41).
Does the continuity between the inhibitor switch terminal 5 (D)
and 8 (A) accord with the table 2 corresponding to the AT selector
positions?Repair the circuit
between the
connector
terminal (C±37) 6
and (E±41) 8.
Go to
step 8
Replace the
inhibitor switch.
Go to
Step 8
61. Disconnect the AT mode connector (E±41).
Does the continuity between the inhibitor switch terminal 5 (D)
and 7 (B) accord with the table 2 corresponding to the AT selector
positions?Repair the circuit
between the
connector
terminal (C±37)
19 and (E±41) 7.
Go to
Step 8
Replace the
inhibitor switch.
Go to
Step 8
71. Disconnect the AT mode connector (E±41).
Does the continuity between the inhibitor switch terminal 5 (D)
and 6 (C) accord with the table 2 corresponding to the AT selector
positions?Repair the circuit
between the
connector
terminal (C±37) 5
and (E±41) 6.
Go to
Step 8
Replace the
inhibitor switch.
Go to
Step 8
81. Check that all the parts are mounted.
2. Clear the trouble code.
Is this step complete?
Verify the repair.Go to Step 8

4B2±113
DRIVE LINE CONTROL SYSTEM (TOD)
StepActionYe sNo
11. Turn on the starter switch.
Is any of the trouble codes 41 (P1741), 42 (P1773), 43 (P1743)
and 55 (P1755) recorded?Examine the
trouble based on
ªDiagnosis from
Trouble Codesº.
Go to Step 2
2Is any of the trouble codes 13 (P1735), 14 (P1731), 15 (P1736),
16 (P1737), 24 (P1733), and 27 (P1738) recorded?Examine the
trouble based on
ªDiagnosis from
Trouble Codesº.
Go to Step 3
3Is the trouble code 17 (P1774) recorded?Examine the
trouble based on
ªDiagnosis from
Trouble Codesº.
Go to Step 4
41. Turn on the starter switch.
2. The car stops, engine speed is less than 1500 rpm, the AT
selector is N position, and select the TOD switch to the 4L
position.
Do the front lamp and rear lamp in the indicator blink?
Go to Step 5
Examine the
trouble based on
ªTrouble
Diagnosis
Depending on the
Status of TOD
Indicatorº.
51. Step on the brake pedal.
Is the transfer changed to the 4L mode?The phenomenon
is not
reproduced.
Refer to
ªTrouble
intermittently
observedº.
Go to Step 6
6When the vehicle is moved forth and back, is the transfer changed
to the 4L mode?The phenomenon
is not
reproduced.
Refer to
ªTrouble
intermittently
observedº.
Go to Step 7
7Does the continuity corresponding to the encoder position
between the terminals comply with the 4L position in the following
table (continuity)?Examine the
trouble based on
ªTrouble
diagnosis
Depending on
The Status of
TOD Indicatorº.
Go to Step 8
81. Step on the brake pedal.
Is the battery voltage observed between the terminal 37 and 47?
Go to Step 10Go to Step 9
91. Turn off the starter switch.
2. Disconnect the ECU connector (C±37) and the brake switch
connector (I±31).
Is there the continuity between the connector terminal (C±37) 15
and (I±31) 4?The brake switch
is abnormal.
Repair or replace
the brake switch.
Go to
Step 13
Repair the
harness.
Go to
Step 13
101. Select the AT selector to the N position.
Is the voltage between the terminals ranged within the following
table (voltage)?
Go to Step 12Go to Step 11
111. Turn off the starter switch.
2. Disconnect the ECU connector (C±37).
3. Disconnect the AT mode switch connector (E±41).
Is there the continuity between the following connector terminals?
(C±37)6 and (E±41)8 (C±37)19 and (E±41)7 (C±37)5 and
(E±41)6
Repair or replace
the AT mode
switch.
Go to
Step 13
Repair the circuit
which has no
continuity.
Go to
Step 13

DRIVE LINE CONTROL SYSTEM (TOD) 4B2±116
StepActionYe sNo
11. Turn on the starter switch.
Is any of the trouble codes 41 (P1741), 42 (P1773), 43 (P1743)
and 55 (P1755) recorded?Examine the
trouble based on
ªDiagnosis from
Trouble Codesº.
Go to Step 2
2Is any of the trouble codes 13 (P1735), 14 (P1731), 15 (P1736),
16 (P1737), 24 (P1733), and 27 (P1738) recorded?Examine the
trouble based on
ªDiagnosis from
Trouble Codesº.
Go to Step 3
3Is the trouble code 17 (P1774) recorded?Examine the
trouble based on
ªDiagnosis from
Trouble Codesº.
Go to Step 4
41. Turn on the starter switch.
2. The car stops, engine speed is less than 1500 rpm, the AT
selector is N position, and select the TOD switch to the TOD
position.
Do the front, rear, and AUTO lamps in the indicator blink?
Go to Step 5
Examine the
trouble based on
ªTrouble
Diagnosis
Depending on the
Status of TOD
Indicatorº.
51. Step on the brake pedal.
Is the transfer changed to the TOD mode?The phenomenon
is not
reproduced.
Refer to
ªTrouble
intermittently
observedº.
Go to Step 6
6When the vehicle is moved forth and back, is the transfer changed
to the TOD mode?The phenomenon
is not
reproduced.
Refer to
ªTrouble
intermittently
observedº.
Go to Step 7
7Is the continuity corresponding to the encoder position between
the terminals ranged within the any case (case 1, 2 and 3) of TOD
position in the following table (continuity)?Examine the
trouble based on
ªTrouble
diagnosis
Depending on
The Status of
TOD Indicatorº.
Go to Step 8
81. Step on the brake pedal.
Is the battery voltage observed between the terminal 37 and 47?
Go to Step 10Go to Step 9
91. Turn off the starter switch.
2. Disconnect the ECU connector (C±37) and the brake switch
connector (I±31).
Is there the continuity between the connector terminal (C±37) 15
and (I±31) 4?The brake switch
is abnormal.
Repair or replace
the brake switch.
Go to
Step 13
Repair the
harness.
Go to
Step 13
101. Select the AT selector to the N position.
Is the voltage between the terminals ranged within the following
table (voltage)?
Go to Step 12Go to Step 11
111. Turn off the starter switch.
2. Disconnect the ECU connector (C±37) and brake switch
connector (I±31).
3. Disconnect the AT mode switch connector (E±41).
Is there the continuity between the following connector terminals?
(C±37)6 and (E±41)8 (C±37)19 and (E±41)7 (C±37)5 and
(E±41)6
Repair or replace
the AT mode
switch.
Go to
Step 13
Repair the circuit
which has no
continuity.
Go to
Step 13

4C±7 DRIVE SHAFT SYSTEM
9. Install lock washer and lock screw.

Turn the side with larger diameter of the tapered
bore to the vehicle outer side, then attach the
washer.

If the bolt holes in the lock plate are not aligned with
the corresponding holes in the nut, reverse the lock
plate.

If the bolt holes are still out of alignment, turn in the
nut just enough to obtain alignment.

Screw is to be fastened tightly so its head may
come lower than the surface of the washer.
411RS012
10. Install cover and gasket then tighten the cover bolt.
Torque: 59 N´m (43 lb ft)
11. Install brake caliper and tighten fixing bolt.

4C±12
DRIVE SHAFT SYSTEM
Preload Adjustment
1. Tighten the hub nut to 29 N´m (22 lb ft), then fully
loosen the nut.
2. Tighten the hub nut to the value given below,
using a spring scale on the wheel pin.
New bearing and New
oil seal
19.6 ± 24.5 N
(4.4 ± 5.5 lb)
Used bearing and New
oil seal11.8 ± 17.7 N
(2.6 ± 4.0 lb)
If the measured bearing preload is outside the
specifications, adjust it by loosening or tightening the
hub nut.
411RS011
9. Install lock washer and lock screw.

Turn the side with larger diameter of the tapered
bore to the vehicle outer side, then attach the
washer.

If the bolt holes in the lock plate are not aligned with
the corresponding holes in the nut, reverse the lock
plate.

If the bolt holes are still out of alignment, turn in the
nut just enough to obtain alignment.

Screw is to be fastened tightly so its head may
come lower than the surface of the washer.
411RS012
10. Apply adhesive (LOCTITE 515 or equivalent) to both
joining flange faces then install hub flange.
11. Install snap ring and shim.

Adjust the clearance between the free wheeling hub
body and the snap ring.
Clearance: 0 mm±0.3 mm (0 in±0.012 in)
Shims Available: 0.2 mm, 0.3 mm, 0.5 mm,
1.0 mm (0.008 in, 0.012 in, 0.020 in, 0.039 in)
411RW002
12. Install hub cap.
13. Tighten the bolts to the specified torque.
Torque: 59 N´m (43 lb ft)
14. Install brake caliper and tighten fixing bolt.

4D2±2
TRANSFER CASE (TOD)
General Description
A04R200003
The Torque-On-Demand (TOD) is an
electronically-controlled torque-split 4-wheel drive
system with the following features.
Shifting Between High and Low Ranges
The shifting mechanism consists of the cam and shaft rail
assembly, the high/low shift motor and the encoder. The
encoder is built-in to the motor.
The encoder senses high/low range shift motor rotation
position and sends this data to the TOD control unit.
Based on this data, the TOD control unit adjusts motor
rotation speed or stops the motor.
The shifting between the high and low ranges using the
TOD switch only is possible. The vehicle must be stopped
or nearly stopped (vehicle speed less than 2 km/h (1.2
mph) and engine speed less than 1,500 rpm), the
automatic transmission selector level must be in the
neutral (N) position, and the brakes must be applied.
Electronically-controlled Wet-type Multiple
Disc Clutch
The clutch automatically provides the optimum drive
power to the front wheels of the vehicle in response to
varying road surface conditions when the vehicle is
operated in the TOD mode. The delivered power ranges
from 0% to 100% of power train output. Superior
operational stability is maintained over a wide range of
operating conditions.
Front Output Drive
Front output drive is provided by a chain. This reduces the
loud noise associated with 4-wheel drive operation.
Oil Pump Lubrication
An oil pump is used to lubricate the transfer. This ensures
stable multiple-disc clutch operation and maintains the
lubricating oil at a constant temperature.

4D2±31 TRANSFER CASE (TOD)
4H and 4L Switch

Check the continuity of 4H and 4L switch.
If defects are observed, replace the 4H and 4L switch.
261R200006
261RW049
Switch
Stroke4H Switch
Signal4L Switch
SignalThe
correspon-
ding
Terminal 2 to
Switch BodyTerminal
1 to 3
g
position of
TOD
switch
1OpenOpen2H, TOD
2OpenClose4L
3CloseCloseNeutral
Shift Motor Assembly

Check the resistance of the shift motor assembly
(between terminal 4 to 7) with a tester.
If defects are observed, replace the shift motor
assembly.
Standard : 0.63+0.2
(at ordinary temperature)
8±6
261RY00023
Oil Pump

Remove foreign materials from the strainer. If the
strainer is damaged, replace it.

If the area into which the shaft is inserted is
excessively worn or damaged, replace the oil pump
assembly.