ESP SSANGYONG MUSSO 1998 Workshop Owner's Manual

TRANSFER CASE (TOD) 5D2-21
DIAGNOSIS
Malfunction interior TOD control unit ; fault code
1714
lPhenomenon
1. When ignition “ON”, “4WD CHECK” lamp illuminates
continuously.
2. On diagnosis by SCAN-100, it displays fault code “1714”.
lCause ; Error of EEPROM checksum in TOD control unit
Test Stage / Contents
Result
Stage Test Contents and ProcedureSpecified Value
/Yes/NoCountermeasure
Check power supply for TOD control unit.
1. Disconnect 30 pin connector from TOD control unit.
2. Ignition “ON”.
3. Using multi-tester, measure voltage between pin 5(+)
and 17/18 (-).
- Specified value
- Measured value is within specified range ?11-14 Vdc
Ye s
NoPerform A2 stage
Perform A3 stage
Check connection status in TOD control unit connector.
1. Check connection status.
- Is it connected exactly?
2. In case of mal-connection, connect tightly then perform
the follows.
a. Delete fault code using Scan-100.
b. Ignition “OFF”.
c. Ignition “ON”.
d. Diagnose by Scan-100.
- Does it display fault code “1714”?Ye s
No
Ye s
No
Check short of 10A fuse (fuse No.20).
1. Detach No.20 fuse from engine room fuse box.
2. Check the existence of short.
- Is fuse normal? Yes
No
Check ground of TOD control unit.
1. Ignition “ON”.
2. Check voltage between 4/19 (+) pin and 17/18 (-)
using multi-tester (keep connection status).
- Specified value (battery is good)
- Measured value
3. Check short between 17/18 pin and body after
disconnect 30 pin connector.
- Is resistance "¥"?12Vdc (battery
voltage)
Ye s
No
Ye s
No A1
A2
A3
A4
Perform A3 stage
Perform A2 stage
Perform A3 stage
Normal system
Perform A4 stage
Replace fuse, then
perform A1 stage
Perform A4-3 stage
Replace TOD control
unit
Repair ground wiring
Ground is O.K.,
perform A5 stage

5D2-22 TRANSFER CASE (TOD)
Check function of TOD control unit.
1. Even A1, A2, A3 and A4 test, if you could not find defect,
it is required to replace TOD control unit on basis of
below phenomena.
a. ”4WD CHECK” lamp illuminates continuously when
ignition “ON”.
b. Shift is not possible even 4H/4L switch operation.
c. Upon diagnosis by Scan-100, it displays on
“impossible communication with TOD control unit”
or fault code “1714, 1715, 1716”.
- Do occur the above defects? Yes
NoReplace TOD control
unit
Normal system A5Test Stage / Contents
Result
Stage Test Contents and ProcedureSpecified Value
/Yes/NoCountermeasure

TRANSFER CASE (TOD) 5D2-23
Error of signal in engine throttle position ; fault
code 1715, 1716
lPhenomenon
1. Upon diagnosis by SCAN-100, it display on 1715,
1716 codes.
lCause
1. Bad communication line between E/G ECU and CAN.
2. Defect of TOD control unit.
3. Defect of E/G ECU.
Check connection status of connector through CAN
communication line.
1. Check connection of connector.
- Does connector connect correctly between TOD
control unit and E/G ECU?
2. In case of bad connection, connect correctly then
perform the follows ;
a. Delete the memorized fault code using SCANNER.
b. Ignition “OFF”.
c. Ignition “ON”.
d. Diagnose by SCANNER.
- Does it display fault codes “1715” or “1716”.Ye s
No
B1
Ye s
No
Check connection status of CAN communication line towards
E/G ECU.
1. Ignition “OFF”.
2. Disconnect 30 pin connector towards TOD control unit.
3. Measure resistance between pin No.22 and 23 in wiring
connector using multi-tester.
- Specified value
- Measured value is within specified range? B2
115-125W
Ye s
No
Check connection status of CAN communication line towards
TOD control unit.
1. Ignition “OFF”.
2. Disconnect coupling of E/G ECU (gray, 1-60 pin).
3. Measure resistance between pin No.37 and 38 in
coupling using multi-tester.
- Specified value
- Measured value is within specified range? B3
115-125W
Ye s
No Test Stage / Contents
Result
Stage Test Contents and ProcedureSpecified Value
/Yes/NoCountermeasure
Perform B2 stage
Perform B1-2 stage
Perform B2 stage
Normal system
Perform B3 STAGE
Perform B4 stage,
check and replace E/
G ECU
Perform B5 STAGE
Replace TOD control
unit

5D2-24 TRANSFER CASE (TOD)
Ye s
No B4
B5
Ye s
No
B6
4.75-5.25Vdc
Ye s
No
B70.3-0.9Vdc
4.6-4.9Vdc
Ye s
No
4.6-4.9Vdc
0.3-0.9Vdc
Ye s
No Test Stage / Contents
Result
Stage Test Contents and ProcedureSpecified Value
/Yes/NoCountermeasure
Check CAN communication line by diagnosis of E/G ECU.
1. Diagnose E/G ECU with SCANNER.
2. Does it display on fault code “27” ?
Check power supply and signal output on throttle valve
position sensor (potentiometer) 1,2.
1. Diagnose E/G ECU with SCANNER.
- Fault codes : 104, 105, 108, 109, 119, 185
Does it display on above code ?
Check power supply (5V) of throttle valve position sensor.
1. Ignition “ON”
2. Measure voltage between pin 112(+) and 84(-) keeping
coupling connection status using multi - tester.
- Specified value
- Measured value is within specified range ?
Check output signal from throttle position sensor 1 and 2.
1. Keep E/G idle status.
2. Measure output voltage between pin 87 (+) and 84 (-)
keeping E/G ECU coupling connection status using multi-
tester. (potentiometer 1)
- Specified value min. acc. Pedal
max. acc. Pedal
- Measured value is within specified range ?
3. Measure output voltage between pin 85 (+) and 84 (-)
keeping E/G ECU coupling connection status using multi-
tester. (potentiometer 2)
- Specified value min. acc. Pedal
max. acc. Pedal
- Measured value is within specified range ?
Replace TOD control
unit
Replace throttle body
actuator or check
cable Perform B1, B2, B3
stages
Perform B5 stage
Perform B6 stage
Replace TOD control
unit or perform A1-
A5 stages
Perform B7 stage
Replace E/G ECU or
perform B1-2 stage
after checking cable.
Perform B7-3 stage
Replace throttle body
actuator or check
cable.

TRANSFER CASE (TOD) 5D2-25
Error in electro - magnetic clutch : fault code
“1721”, “1722”
lPhenomenon
1. Upon diagnosis by SCAN-100, it displays on fault
codes “1721,1722”.
lCause
1. Defect in electro - magnetic clutch
2. Defect in connector or wiring
- Open or short from EMC to the supply : 1721
- Short EMC to ground : 1722
Ye s
No
C1
Ye s
No Ye s
No
11-15Vdc
Ye s
No
C2
Ye s
No
Test Stage / ContentsResult
Stage Test Contents and ProcedureSpecified Value
/Yes/NoCountermeasure
Check relevant connector connection status.
1. Check relevant connector connection status with TOD
control unit.
- Does it connect correctly ?
2. Check connection status of speed sensor and clutch
coil connector (7 pin) in transfer case.
- Does it connect correctly ?
3. In case of bad connection, connect it correctly then
perform the follows :
a. Delete the memorized fault code in control unit with
Scan - 100.
b. Ignition “OFF”.
c. Ignition “ON”.
d. Diagnose by SCAN-100
- Does it display on fault codes “1721,1722” ?
Check supply voltage into electro-magnetic clutch.
1. Ignition “ON”
2. Measure voltage between pin 4/19(+) and 17/18(-) in
TOD control unit connector.
- Specified value
- Measured value is within specified range ?
3. If the specified value would not be measured, perform
the follows :
a. Check battery voltage (charging condition)
b. Check open circuit on No.13 fuse (20A)
c. Check relevant wires.
- Is the above 3a, 3b, 3c normal ?Perform C1-2 stage
Perform C1-3 stage
Perform C2 stage
Normal system Perform C2 stage
Perform C1-3 stage
Perform C3 stage
Perform C2-3 stage
Perform C3 stage
lCharging/
Replace battery
lReplace fuse
lRepair wires

5D2-26 TRANSFER CASE (TOD)
0Vdc
11 - 15Vdc
Ye s
No
2.5W
Ye s
No C3Test Stage / Contents
Result
Stage Test Contents and ProcedureSpecified Value
/Yes/NoCountermeasure
Check resistance of electro-magnetic clutch.
1. Disconnect 30 pin connector from TOD control unit.
2. Measure resistance between pin 3 and 7 in wiring
connector using multi-tester.
- Specified value
- Measured value is within specified range?Perform C4 stage
l0W : short
l¥W : open
C4Check operational voltage of elector-magnetic clutch.
1. Ignition "ON"
2. Measure voltge between pin 3(+) and 17(-)in TOD
control unit connector.
- Specified value 4WD high
4WD low
- Measure value is within specified range ?Replace TOD
control unit
Replace wire

TRANSFER CASE (TOD) 5D2-27
Defect in speed sensor : fault code 1731, 1732,
1733, 1734, 1735,1736
lPhenomenon
1. Upon diagnosis by SCANNER, it displays on fault code
1731, 1732, 1733, 1734, 1735 and 1736.
2. “4WD CHECK” lamp illuminates continuously when
ignition “ON”.
lCause
1. Defect of speed sensor (front, rear).
2. Defect of power supply.
4.75-5.25Vdc
Ye s
No D1
Ye s
No
D2
Ye s
Ye s
Ye s
No D3Test Stage / Contents
Result
Stage Test Contents and ProcedureSpecified Value
/Yes/NoCountermeasure
Check power supply of speed sensor.
1. Ignition “ON” or driving mode
2. Measure supply voltage between pin 16 (+) and 13 (-) in
TOD control unit connector using digital multi-tester.
- Specified value
- Measured value is within specified range ?
Check connection status of connector.
1. Check connection status of speed sensor/clutch coil
connector and TOD control unit connector.
- Does it connect correctly ?
2. In case of bad connection, connect it correctly then
perform the follows:
a. Delete the memorized fault code in control unit by
SCANNER.
b. Ignition “OFF”.
c. Ignition “ON”.
d. Diagnose by SCANNER.
- It does not display fault code.
- It displays one or more fault code among 1731 to
1736.
Check output wave of front and rear speed sensor.
1. Upon driving mode.
2. Check output wave of each speed sensor by SCANNER.
3. Is it normal on output wave ?Perform D3 stage
Perform D2 stage
Perform D3 stage
Perform D2-2 stage
Normal system
Perform D3 stage
Perform D4 stage
Replace speed
sensor then
perform D2-2 stage

5D2-28 TRANSFER CASE (TOD)
Ye s
No D4Test Stage / Contents
Result
Stage Test Contents and ProcedureSpecified Value
/Yes/NoCountermeasure
Check output voltage of front and rear speed sensor.
1. Upon driving mode
2. Measure output voltage of front and rear speed sensor
by multi-tester. Check voltage whether it varies within
specified range.
- Specified value
• Front speed sensor
: Pin 11(+), 13(-) in TOD control unit connector
• Rear speed sensor
: Pin 29(+), 13(-) in TOD control unit connector
- Measure value is within specified range ?Check function of
control unit.
It necessary,
replace then delete
fault codes and re-
diagnose .
Perform D5 stage
Ye s
No
D5
Check short/open in cable.
1. Ignition"OFF"
2. Disconnect TOD control unit connector
3. Make a test for open circuit between pin 11 and 13, 16
and 13, 29 and 13 in wiring connector by multi-tester.
- Is there a resistance of " ¥ " ?
4. Make a test for short between pin 11 and ground 13
and ground, 29 and ground by multi-tester.
- Is there a resistance of " ¥ W " ?Repair wire Perform
D5-4 stge
Ye s
NoWiring short, repair
Perform D3 stage,
then delete fault
codes with
rediagnosis

TRANSFER CASE (TOD) 5D2-29
Shift motor malfunction : Fault code ® 1741,
1742, 1743
lPhenomenon
1. When change the 4H/4L switch from 4H to 4L, ‘4L’
indicator lamp turn off after blinking for a time and then
‘4WD CHECK’ indicator lamp turn on.
2. Fault codes display by diagnosis of SCAN-100 : 1741,
1742, 1743
3. The shifting operation is not occurred when 4H / 4L switch,
is operating.
lCause
Defect in shift motor, improper voltage provided, incorrect
connection in connector, short of wiring.
11-14 V
(Battery voltage)
Ye s
No E1
11-14 V
(Battery voltage)
Ye s
No
Ye s
No
E2
Ye s
No Test Stage / Contents
Result
Stage Test Contents and ProcedureSpecified Value
/Yes/NoCountermeasure
Check the input voltage of shift motor.
1. Turn the ignition switch to “ON” position.
2. Measure the Hi/Low voltage of motor which is located
between No.1/No.14 and No.2/No.15 connector of TOD
control unit with digital Multi-tester or which is located
between No.G connector and body after detaching T/C
motor connector.
- The specified value (When operates 4H/4L switch)
- Measured value is within specified range ?
3. Measure the Hi/Low voltage of motor which is located
between No.2/No.5 and No.1/No.14 connector or which
is located No.B connector and body after detaching T/C
motor connector
- The specified value (When operates 4H/4L switch)
- Measured value is within specified range ?
Check the fault condition of the relevant connector.
1. Check the installation condition of TOD control unit 30pin
connector and T/C shift motor connector.
- Is it installed properly ?
2. If the connector installation is improper, install properly
and then perform follows :
a. Delete the fault code of control unit by scan scope
b. Turn off the ignition switch
c. Turn on the ignition switch
d. Re-diagnosis of system
It displays one or more fault code among 1741 to 1743.Perform E1-3 stage
Perform E2 stage
Perform E4 stage
Perform E2 stage
Perform E3 stage
Perform E2-2 stage
Perform E3 stage
Normal system

5D2-30 TRANSFER CASE (TOD)
Ye s
No
Ye s
No
Ye s
No E3
Ye s
No E4
Ye s
No E5Test Stage / Contents
Result
Stage Test Contents and ProcedureSpecified Value
/Yes/NoCountermeasure
Check the wiring of shift motor whether it is shorted or not.
1. Turn off the ignition switch.
2. Detach the 30pin connector from TOD control unit
3. Perform short test between the wiring connector No.1/
No.14 and No.2/No.5.
- Is there resistance of 0W ?
4. Perform the short test between No.1/No.14 Connector
and body, No2/No.15 connector and body.
- Is there resistance of 0W ?
5. Execute E1 stage to check whether wiring is shorted
between Hi-Low motor and LOW-HI motor.
- Is the provided voltage proper ?
Check the resistance of shift motor
1. Turn off the ignition switch.
2. Measure the resistance between No.1/No.14 and No.2/
No.15 connector after detaching 30pin connector of TOD
control unit Or, check the resistance between No.G and
No.B after detaching motor connector of T/C side.
- Specified value
- Measured value is within specified range ?
Execute the test after detaching shift motor, when the fault
is not solved after executing E1~E4 stage.
1. Detach the motor connector from T/C.
2. Remove the shift motor.
3. Connect motor connector with the removed shift motor.
4. Operate the 4H/4L switch.
- Does motor rotate ?Hi-Low motor and
Lo-Hi wiring are
shorted each other.
Repair or replace.
Perform E3-4 stage.
Related wiring is
shorted with ground.
Repair or replace.
Perform E3-5 stage.
Perform E4 stage.
Wiring is shorted.
Repair or replace.
The defective T/C or
perform E5 stage.
Replace the shift
motor.
Check and fix due to
the defective T/C
ass’y.
Replace the motor
or delete fault code
and rediagnosis
system.