SsangYong Korando II (1996-2006 year). Manual - part 292

AUTOMATIC TRANSMISSION 5A-71

SSANGYONG MY2002

DTC P1703 Engine Speed Signal Error

Perform a Transmission Control Module (TCM) Diag-
nostic System Check.
Is the check performed?
1. Install the scan tool.
2. Turn the ignition ON, with the engine OFF.
3. Record and then clear DTCs.
4. Operate the vehicle within the conditions for

setting this DTC as specified in the text.

Does the scan tool display P1703?
Check if there are any DTCs related to the engine
speed sensor on the ECM side.
Are any DTCs related to engine speed sensor found?
Check for a poor connection at the ECM connector or
TCM connector and repair the malfunctioning termi-
nals as necessary.
Is a repair necessary?
1. Turn the ignition OFF.
2. Replace the TCM.
Is the action complete?
1. Using the scan tool, clear the DTCs.
2. Road test the vehicle within the conditions for

setting this DTC as specified in the text.

Does the scan tool indicate that this diagnostic has
run and passed?
Check if any DTCs are set.
Are there any DTCs displayed or previously recorded
at Step 2 that have not been diagnosed?

Step

Action

Value(s)

Yes

Go to Step 6

Go to Step 5

Go to Step 6

Go to Step 7

Go to Step 2

Go to “TCM

Diagnostic

System Check”

Go to Step 3

Go to

“Diagnostic

Aids”

Go to Section

1F, Engine

Controls

Go to Step 4

Go to

applicable

DTC table

System OK,

Check

Complete

5A-72 AUTOMATIC TRANSMISSION

SSANGYONG MY2002

Circuit Description

The Controller Area Network (CAN) connects various
control modules by using a twisted pair of wires, to
share common information. This results in a reduction
of sensors and wiring. TCM obtains the actual engine
speed and throttle position, vehicle speed and
accelerator position etc. from ECM via CAN without
any additional sensors.

The DTC P1704 sets when the indicated drive shaft
speed signal via CAN is out of range or not feasible or
a shaft speed of 0 is present while other signals indicate
the vehicle is being driven.

Conditions for Setting the DTC

•

Immediately upon the test indicating malfunction
as follows.

•

The shaft speed signal is greater than 9000 rpm or
less than 0 rpm under the precondition that DTC
P1719 is not set.

•

The shaft speed indicates 0 rpm while all other sig-
nals indicate the car is moving under the following
precondition;

- Driving gear is selected.

- The transmission range sensor has not recently

changed state.

- The engine speed is greater than 2800 rpm.

- DTCs P0706, P0707, P0708, P1703 and P1719

are not set.

•

The shaft speed has dropped from above 2100 rpm
to 0 rpm within 20 ms.

DIAGNOSTIC TROUBLE CODE (DTC) P1704

SHAFT SPEED SIGNAL ERROR

Action Taken When the DTC Sets

•

All skip downshifts disabled and fourth gear will
be in-hibited.

•

The torque converter will be unlocked at all times.

•

Gears are selected by the shift control lever but all
downshifts are inhibited by engine speed limits to
prevent over-revving.

•

D position selects 3rd gear.

•

1st and 2nd gears can be manually selected.

Conditions for Clearing the DTC

•

The DTC will clear when the malfunction has not
occurred for 30 seconds and a non-zero speed is
detected.

•

A history DTC will clear after 40 TCM power-up
cycles with a warm transmission (>50 °C) and
without a fault.

•

History DTCs can be cleared by using a scan tool.

Diagnostic Aids

•

Inspect the wiring for poor electrical connections
at the TCM and ECM connectors. Look for possible
bent, backed out, deformed or damaged terminals.
Check for weak terminal tension as well. Also check
for chafed wires that could short to bare metal or
other wiring. Inspect for broken wire inside the
insulation.

KAA5A5KA

AUTOMATIC TRANSMISSION 5A-73

SSANGYONG MY2002

•

If diagnosing for a possible intermittent short or
open condition, move or massage the wiring harness
while observing test equipment for a change.

•

When ECM finds a fault on the vehicle speed
signals, ECM will adopt a default mode and send
the default value and trouble message to TCM via
CAN.

Test Description

The number(s) below refer to the step number(s) on
the Diagnostic Table.

3. Check if there are any DTCs related to the vehicle

speed sensor on the ECM side.

4. Check a poor connection at the ECM and TCM

connectors.

DTC P1704 Shaft Speed Signal Error

Perform a Transmission Control Module (TCM)
Diagnostic System Check.
Is the check performed?
1. Install the scan tool.
2. Turn the ignition ON, with the engine OFF.
3. Record and then clear DTCs.
4. Operate the vehicle within the conditions for

setting this DTC as specified in the text.

Does the scan tool display P1704?
Check if there are any DTCs related to the vehicle
speed sensor on the ECM side.
Are any DTCs related to vehicle speed sensor found?
1. Turn the ignition OFF.
2. Replace the TCM.
Is the action complete?
1. Using the scan tool, clear the DTCs.
2. Road test the vehicle within the conditions for

setting this DTC as specified in the text.

Does the scan tool indicate that this diagnostic has
run and passed?
Check if any DTCs are set.
Are there any DTCs displayed or previously recorded
at Step 2 that have not been diagnosed?

Step

Action

Value(s)

Yes

Go to Step 5

Go to Step 6

Go to Step 2

Go to “TCM

Diagnostic

System Check”

Go to Step 3

Go to

“Diagnostic

Aids”

Go to Section

1F, Engine

Controls

Go to Step 4

Go to

applicable

DTC table

System OK,

Check

Complete

5A-74 AUTOMATIC TRANSMISSION

SSANGYONG MY2002

Circuit Description

The battery voltage monitoring input is connected to
the positive side of the battery. This signal is taken
from the main supply to the TCM.

If the battery voltage at the TCM falls below the thresh-
old value, DTC P1708 will be set and the transmission
will adopt a low voltage mode of operating in which
shifts into first gear are inhibited. All other shifts are
attempted but may not occur because of the reduced
voltage. This condition normally occurs only when the
battery is in poor condition.

When system voltage recovers, the TCM will resume
normal operation after a 30 seconds delay period.

Conditions for Setting the DTC

•

The engine speed is greater than 550 RPM.

•

A driving gear is selected or one of DTCs P0706,
P0707 and P0708 is set.

•

The indicated supply voltage falls below a linear
temperature characteristic threshold or below that
required to operate the CPU. If the TCM measures
the supply voltage at less than that required for it
to be operating, the DTC sets immediately.

Action Taken When the DTC Sets

•

1st gear is inhibited.

•

S6 is inhibited.

•

S5 standby current is zero.

DIAGNOSTIC TROUBLE CODE (DTC) P1708

TCM SUPPLY VOLTAGE LOW

Conditions for Clearing the DTC

•

The DTC will clear when the malfunction has not
occurred for 30 seconds.

•

A history DTC will clear after 40 TCM power-up
cycles with a warm transmission (>50 °C) and
without a fault.

•

History DTCs can be cleared by using a scan tool.

Diagnostic Aids

•

The minimum operating voltage depends on the
transmission temperature but is typically between
8 - 9 V for a warm transmission.

•

If the DTC sets when an accessory is operated,
check for a poor connection.

•

Look for possible bent, backed out, deformed or
damaged terminals. Check for weak terminal tension
as well. Also, check for chafed wires that could short
to bare metal or other wiring. Inspect for broken
wires inside the insulation.

•

If diagnosing for a possible intermittent short or
open condition, move or massage the wiring harness
while observing test equipment for a change.

Test Description

The number(s) below refer to the step number(s) on
the Diagnostic Table.

4. Check if the generator is malfunctioning under load

condition.

8. Check the ignition feed circuit for excessive resist-

ance.

KAA5A5KA

Content .. 290 291 292 293 ..