SsangYong Stavic / SsangYong Rodius (2005 year). Manual - part 362

CHANGED BY

EFFECTIVE DATE

AFFECTED VIN

55

TOD

STAVIC - 2004.09

4D

Front Sensor Speed Test

When the system detects a fault from front speed sensor for over 0.5 second, “4WD CHECK” warning lamp comes on.
At this time, the responds from TOD control unit are as follows:

• If the system is in “4H” state, the TOD control unit uses rear speed sensor value to determine the amount of EMC

touch off and the wheel slip control stops.

• If the system is in “4L” state, the EMC duty cycle is set at maximum value (according to the vehicle speed) until

system stops “4L” operation.

• All electrical shift operations are stopped until ignition switch is cycled from “OFF” to “ON” position. Any shift

operation in progress completes the process. When the front speed sensor is restored continuously for 0.5 seconds,
the TOD control unit becomes normal status. At this time, “4WD CHECK” warning lamp comes on but the trouble
code still remains in the memory.

Rear Speed Sensor Test

When the system detects a fault from rear speed sensor for over 0.5 second, “4WD CHECK” warning lamp comes on.
At this time, the responds from TOD control unit are as follows:

• If the system is in “4H” state, the TOD control unit uses front speed sensor value to determine the amount of EMC

touch off and the wheel slip control stops.

• If the system is in “4L” state, the EMC duty cycle is set at maximum value (according to the vehicle speed) until

system stops “4L” operation.

• All electrical shift operations are stopped until ignition switch is cycled from “OFF” to “ON” position. Any shift

operation in progress completes the process. When the rear speed sensor is restored continuously for 0.5 seconds,
the TOD control unit becomes normal status. At this time, “4WD CHECK” warning lamp comes on but the trouble
code still remains in the memory.

All Troubles from Speed Sensor

When the system detects a fault from front and rear speed sensors for 0.5 seconds, “4WD CHECK” warning lamp
comes on. At this time, the responds from TOD control unit are as follows:

• If the system is in “4H” state, the TOD control unit is set up based on EMC touch off amount and the wheel slip

control stops.

• If the system is in “4L” state, the EMC duty cycle is set at maximum value (according to the vehicle speed) until

system stops “4L” operation.

• All electrical shift operations are stopped until ignition switch is cycled from “OFF” to “ON” position. Any shift

operation in progress completes the process. When the rear speed sensor is restored continuously for 0.5 seconds,
the TOD control unit becomes normal status. At this time, “4WD CHECK” warning lamp comes on but the trouble
code still remains in the memory.

EMC Test

The EMC tests whether the circuit is short or open to ground. When the system detects a fault for 0.8 seconds, “4WD
CHECK” warning lamp comes on and TOD stops its operation. When the EMC is restored continuously for 0.8 seconds,
the TOD control unit functions normally. At this time, “4WD CHECK” warning lamp comes on but the trouble code still
remains in the memory.

CHANGED BY

EFFECTIVE DATE

AFFECTED VIN

56

TOD

STAVIC - 2004.09

4D

CAN TPS Test

• When TCCU receives CAN message including TPS value of over 100 % continuously for 1 second, TCCU determines

it as signal error and “4WD CHECK” warning lamp comes on.

When the system is in TOD mode, the TOD control unit considers that the throttle is in idle.

• When the TPS value is restored continuously for 1 second, the TCCU functions normally and “4WD CHECK” warning

lamp comes on but the trouble code still remains in the memory.

• TCCU receives CAN TPS messages periodically. If TCCU cannot receive the messages for 4 periods, TCCU determines

it as signal loss. If it happens continuously for 1 second, TCCU considers it as the invalid signal and “4WD CHECK”
warning lamp comes on.

• When the CAN message including ABS value is restored continuously for 1 second, TCCU functions normally and

“4WD CHECK” warning lamp comes on but the trouble code still remains in the memory.

Transmission Neutral Test

• If TCCU cannot receive the messages for 4 periods, TCCU determines it as signal loss. If it happens continuously for

1 second, TCCU considers it as the invalid signal and “4WD CHECK” warning lamp comes on. And TCCU determines
that the transmission is not in neutral position.

• When CAN message including indication of transmission in neutral is restored continuously for 1 second, TCCU

functions normally and “4WD CHECK” warning lamp comes on but the trouble code still remains in the memory.

Stuck in Low Test

• Stuck in low DTC is set when the shift conditions are satisfied, no encoder trouble exists and the TCCU is not

formed outside of shift range. Stuck in low trouble completing time is 1 second longer than the maximum shift. If the
trouble is detected, “4WD CHECK” warning lamp comes on and shifting is not possible.

• If stuck in low fault is not valid, it is erased at the next ignition cycle and the “4WD CHECK” lamp lights out but fault

code remains in the memory.

CAN Bus Off Test

• CAN bus off trouble is set when the transferring trouble exceeds 255 times and CAN bus in TCCU goes to off

condition. When the trouble counter exceeds 255 times, the signal is recognized as invalid and the “4WD CHECK”
warning lamp comes on.

• If CAN bus in TCCU goes to reset condition while in Bus off condition, the transferring and receiving signals are

interrupted and the synchronization for bus disappears. Once it is reset, TCCU tries to resynchronize with CAN bus.
When the resynchronization stops, the communication is resumed. At this time, the trouble is erased and “4WD
CHECK” warning lamp comes on but the trouble code still remains in the memory.

CHANGED BY

EFFECTIVE DATE

AFFECTED VIN

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TOD

STAVIC - 2004.09

4D

2. CODING ON TOD CONTROL UNIT

What’s Coding?

An input activity of data for the proper performance by match-
ing specification, devices and system with control unit.

Coding required

1. Replacement of TOD control unit.

2. Adjustment by input error.

Coding method

1. Check and record engine type, axle ratio and tire size.

2. Turn the ignition switch to “OFF” position.

3. Connect the scanner with diagnosis connector.

4. Turn the ignition switch to “ON” position.

5. Select “TOD” from “CONTROL UNIT SELECTION” screen

and press “ENTER”.

6. Read the current memorized specification in TOD control

unit.

7. Compare memorized specification with the checked

record. If not matched, perform a coding.

8. Read again memorized coding specification in TOD

control unit for confirmation of coding.

9. Turn the ignition switch to “OFF” position.

10. After 5 seconds, turn the ignition switch to “ON” position.

11. Check coding specification whether it matches with

vehicle or not. If not, perform a coding again.

CHANGED BY

EFFECTIVE DATE

AFFECTED VIN

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TOD

STAVIC - 2004.09

4D

P1806

P1816

P1814

P1815

P1817

P1821

P1822

P1830

P1831

P1832

P1833

P1834

CAN Bus OFF

CAN: abnormal TPS signal

CAN: no TPS signal

CAN: no neutral signal

CAN: no ABS signal

Open or short to battery in magnetic clutch
coil circuit

Short to ground in magnetic clutch coil cir-
cuit

Abnormal rear speed sensor signals

Too low front speed sensor voltage

Too high front speed sensor voltage

Too low rear speed sensor voltage

Too high rear speed sensor voltage

- Check communication line.

- Check the relevant connectors for contact.

- Replace TOD unit if necessary.

- Check communication line.

- Check the relevant connectors for contact.

- Check engine ECU.

- Replace TOD unit if necessary.

- Check communication line.

- Check the relevant connectors for contact.

- Check engine ECU.

- Replace TOD unit if necessary.

- Check communication line.

- Check the relevant connectors for contact.

- Check TCU.

- Replace TOD unit if necessary.

- Check communication line.

- Check the relevant connectors for contact.

- Check ABS/ESP unit.

- Replace TOD unit if necessary.

- Check communication line.

- Replace TOD unit if necessary.

- Voltage at TCCU pin No.11: 11 ~ 15 V

- EMC resistance: 2.5 

Ω

- Replace TOD unit if necessary.

- The indicator is flickering even after IG switch ON.

- The indicator is flickering over 0.5 seconds.

- Check the relevant harnesses.

- Check the relevant connectors for contact.

- Replace sensors if necessary.

- Too low front speed sensor voltage

- Check the relevant harnesses.

- Check the relevant connectors for contact.

- Too high front speed sensor voltage

- Check the relevant harnesses.

- Check the relevant connectors for contact.

- Replace sensors if necessary.

- Pin voltage: below 0.9 V

- Check the rear speed sensor harness for contact.

- Replace TCCU if necessary.

- Pin voltage: 4.75 ~ 5.25 V

- Check the relevant harnesses.

- Check the relevant connectors for contact.

- Replace sensors if necessary.

3. DIAGNOSTIC TROUBLE CODE

Code

Description

Action