SsangYong Korando II (1996-2006 year). Manual - part 291

AUTOMATIC TRANSMISSION 5A-67

SSANGYONG MY2002

DTC P0790 Normal/Performance Switch Circuit Malfunction

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 P0790?
1. Turn the ignition OFF.
2. Disconnect the mode switch connector. Refer to

Shift Control Lever in this section.

3. Turn the ignition ON.
4. Select Mode Switch on scan tool Data List.
Is the Mode Switch value frequently changing?
1. Turn the ignition OFF.
2. Disconnect the TCM connector B.
3. Check the mode switch signal circuit for an

intermittent open or short and repair as necessary.

Is a repair necessary?
Jumper the mode switch ground terminal 1 to the
signal terminal 2.
Is the Mode Switch value frequently changing?
1. Turn the ignition OFF.
2. Disconnect the TCM connector B.
3. Check the mode switch ground circuit for an

intermittent open and repair as necessary.

Is a repair complete?
Check the fuse F27 for a malfunctioning and replace
as necessary?
Is a repair necessary?
Jumper the mode switch feed terminal 3 to the signal
terminal 2.
Is the Mode Switch value frequently changed?
1. Turn the ignition OFF.
2. Disconnect the TCM connector B.
3. Check the mode switch feed circuit for an

intermittent open and repair as necessary.

Is a repair complete?
Check for a poor connection at the mode switch and
TCM connector and repair the malfunctioning terminals
as necessary.
Is a repair necessary?

Step

Action

Value(s)

Yes

Go to Step 6

Go to Step 7

Go to Step 13

Go to Step 10

Go to Step 13

Go to Step 8

Go to Step 9

Go to Step 11

Go to Step 13

Go to Step 2

Go to “TCM

Diagnostic

System Check”

Go to Step 4

Go to Step 5

Go to Step 3

Go to

“Diagnostic

Aids”

Go to Step 13 Go to Step 12

5A-68 AUTOMATIC TRANSMISSION

SSANGYONG MY2002

DTC P0790 Normal/Performance Switch Circuit Malfunction (Cont'd)

Replace the mode switch. Refer to Shift Control Lever
in this section.
Is the action complete?
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 14

Go to Step 2

Go to Step 13

Go to

applicable

DTC table

System OK,

Check

Complete

AUTOMATIC TRANSMISSION 5A-69

SSANGYONG MY2002

BLANK

5A-70 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 P1703 sets when the engine speed signal via
CAN is out of range or not feasible: The engine speed
signal is greater than 7000 rpm or less than 0 rpm, or
the indicated engine speed is low while other signals
indicate the car is moving (i.e. the vehicle speed has
increased more than 125 rpm).

Conditions for Setting the DTC

•

Immediately upon the test indicating malfunction
as follows.

•

The engine speed signal is greater than 7000 rpm
or less than 0 rpm under the precondition that DTC
P1719 is not set.

•

The indicated engine speed is low while other signals
indicate the car is moving, i.e. the vehicle speed
has increased more than 125 rpm under the following
precondition;

- Driving gear is selected.

- The applied throttle is greater than 5 %.

- The engine speed is less than 550 rpm.

- DTCs P0706, P0707, P0708, P1704, P1719 and

1721 are not set.

Action Taken When the DTC Sets

•

Fault detection of some other signals will not pos-
sible.

DIAGNOSTIC TROUBLE CODE (DTC) P1703

ENGINE SPEED SIGNAL ERROR

Conditions for Clearing the DTC

•

The DTC will clear after 30 seconds without the fault.

•

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.

•

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 engine 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 engine

speed sensor on the ECM side.

4. Check for a poor connection at the ECM and TCM

connectors.

KAA5A5KA

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