1997 SSANGYONG KORANDO engine

5A-92 AUTOMATIC TRANSMISSION
SSANGYONG MY2002
DTC P1717 RAM Error
Circuit Description
A normal function of the Transmission Control Module
(TCM) programming is to perform an internal check
that verifies the integrity of the RAM memory
allocations.
The DTC P1717 sets when the Random Access Memory
(RAM) is not operating correctly when checked on
initialization. An area of RAM has failed a read/ write
test.
Conditions for Setting the DTC
An area of RAM has failed a read/ write test.
Immediately after the above condition occurs.
Action Taken When the DTC Sets
Adopt Limp Home Mode (LHM)
Outputs are disabled.
DIAGNOSTIC TROUBLE CODE (DTC) P1717
RAM ERROR
The transmission adopts the third gear LHM
strategy of operation, independent of the vehicle
speed. The operation of TCM under this condition
is difficult to predict. Its operation may be erratic.
Conditions for Clearing the DTC
The DTC will clear if the malfunction is not present
after cycling the ignition.
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
When DTC P1717 sets, the replacement of TCM is
recommended.
1Perform 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.
Does the scan tool display P1717?
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?
StepAction Value(s) Yes No
2
3
- Go to Step 4 -
4
- Go to Step 5 Go to Step 2
5
- Go to Step 2Go to “TCM
Diagnostic
System Check”
- Go to Step 3 Go to
“Diagnostic
Aids”
-Go to
applicable
DTC tableSystem OK,
Check
Complete

AUTOMATIC TRANSMISSION 5A-93
SSANGYONG MY2002
DTC P1718 ROM Error
Circuit Description
A normal function of the Transmission Control Module
(TCM) programming is to perform an internal check
that verifies the integrity of the ROM memory
allocations. This function is called a checksum.
The DTC P1718 sets when the Read Only Memory
(ROM), program memory, is corrupted when checked
on initialization. The calculated checksum disagrees
with the stored checksum.
Conditions for Setting the DTC
TCM has been powered ON for greater than 7 sec-
onds.
The calculated checksum disagrees with the stored
checksum. The malfunction is triggered immediately
after this condition exists.
DIAGNOSTIC TROUBLE CODE (DTC) P1718
ROM ERROR
Action Taken When the DTC Sets
Adopt Limp Home Mode (LHM)
The transmission adopts the third gear LHM strategy
of operation, independent of the vehicle speed. The
operation of TCM under this condition cannot be
predicted. Its operation may be erratic.
Conditions for Clearing the DTC
The DTC will clear if the malfunction is not present
after cycling the ignition.
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
When DTC P1718 sets, the replacement of TCM is
recommended.
1Perform 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.
Does the scan tool display P1718?
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?
StepAction Value(s) Yes No
2
3
- Go to Step 4 -
4
- Go to Step 5 Go to Step 2
5
- Go to Step 2Go to “TCM
Diagnostic
System Check”
- Go to Step 3 Go to
“Diagnostic
Aids”
-Go to
applicable
DTC tableSystem OK,
Check
Complete

5A-94 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 P1719 sets when the information required by
TCM is not available on the CAN. One or more CAN
messages used by the TCM is timed out, i.e. not re-
freshed for 1 second.
Conditions for Setting the DTC
One or more CAN messages used by the TCM are
timed out, i.e. not refreshed for 1 second.
Action Taken When the DTC Sets
TCM uses default values for all CAN dependent sig-
nals.
Conditions for Clearing the DTC
The DTC will clear when the malfunction has not
occurred for 30 seconds.
DIAGNOSTIC TROUBLE CODE (DTC) P1719
CAN BUS ERROR
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.
Test Description
The number(s) below refer to the step number(s) on
the Diagnostic Table.
6. Check for a poor connection at the ECM and TCM
connectors.
KAA5A3KA

AUTOMATIC TRANSMISSION 5A-95
SSANGYONG MY2002
DTC P1719 CAN Bus Error
1Perform 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 P1719?
1. Turn the ignition OFF.
2. Disconnect the TCM connector B.
3. Disconnect the Engine Control Module (ECM)
connector.
4. Check the wiring harness from ECM connector
terminal 38 to TCM connector terminal B23 for an
open or a short.
Is a problem found?
Repair the malfunctioning wiring harness.
Is a repair complete?
Check the wiring harness from ECM connector termi-
nal 37 to TCM connector terminal B24 for an open or a
short.
Is a problem found?
Check for a poor connection at the ECM connector or
TCM connector and repair the malfunctioning terminals
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?
1. Turn the ignition OFF.
2. Replace the TCM with the original.
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?
StepAction Value(s) Yes No
2
3
5
- Go to Step 8 - 6 4
- Go to Step 10 Go to Step 9 7
8
- Go to Step 11 Go to Step 2 9
10
- Go to Step 2Go to “TCM
Diagnostic
System Check”
-
Go to Step 4 Go to Step 5
- Go to Step 3 Go to
“Diagnostic
Aids”
11
-Go to
applicable
DTC tableSystem OK,
Check
Complete
- Go to Step 4 Go to Step 6
-Go to
Section 1F,
Engine Control-
- Go to Step 10 Go to Step 7
-
Go to Step 10-

5A-96 AUTOMATIC TRANSMISSION
SSANGYONG MY2002
DTC P1720 EEPROM Error
System Description
The Electrically Erasable Programmable Read-Only
Memory (EEPROM) is a permanent memory chip that
is physically soldered within the Transmission Control
Module (TCM). The EEPROM contains the calibration
information required for transmission and transmission
diagnostics operation. When the EEPROM malfunc-
tions, DTC P1720 will set. The EEPROM memory is
corrupted and the calculated checksum disagrees with
the stored checksum or an EEPROM communication
failure has occurred when checked on initialization.
Conditions for Setting the DTC
The calculated checksum disagrees with the stored
checksum or an EEPROM communication failure has
occurred when checked on initialization.
Immediately after the above condition occurs.
DIAGNOSTIC TROUBLE CODE (DTC) P1720
EEPROM ERROR
Action Taken When the DTC Sets
If CAN is detected, OBD N32D VIN is selected. Or
If CAN is not detected, P29 STi VIN is selected.
Default values are used which are typical of
calibrated values.
Shift quality may be degraded.
Conditions for Clearing the DTC
The DTC will only clear if the malfunction is not pres-
ent after cycling the ignition.
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
When DTC 1720 is set, it is likely the TCM will need
replacing.
1Perform 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 P1720?
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?
StepAction Value(s) Yes No
2
3
- Go to Step 4 -
4
- Go to Step 5 Go to Step 2
5
- Go to Step 2Go to “TCM
Diagnostic
System Check”
- Go to Step 3 Go to
“Diagnostic
Aids”
-Go to
applicable
DTC tableSystem OK,
Check
Complete

5A-98 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 etc. from ECM via CAN without any
additional sensors.
The DTC P1721 sets when the throttle signal via CAN
is out of range. The throttle is greater than 254 steps.
Conditions for Setting the DTC
DTC P1719 is not set.
The throttle is greater than 254 steps. The malfunc-
tion triggers immediately after the above condition
occurs.
Action Taken When the DTC Sets
The throttle signal is defaulted to 100 %.
Shift quality is degraded.
All shifts will be firm as full throttle and hence high
engine torque is assumed.
Line pressure will always stay high (S6 OFF) to cope
with the assumed high throttle/ torque.
Manual 1 gear selection is inhibited.
Conditions for Clearing the DTC
The DTC will clear if the malfunction is not present
for 30 seconds.
DIAGNOSTIC TROUBLE CODE (DTC) P1721
THROTTLE SIGNAL ERROR
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 throttle 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 throttle
position sensor on the ECM side.
4. Check for a poor connection at the ECM and TCM
connectors.
KAA5A3KA

AUTOMATIC TRANSMISSION 5A-99
SSANGYONG MY2002
DTC P1721 Throttle Signal Error
1Perform 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 P1721?
Check if there are any DTCs related to the throttle
position sensor on the ECM side.
Are any DTCs related to throttle position 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?
StepAction Value(s) Yes No
2
3
- Go to Step 5 - 4
- Go to Step 6 Go to Step 2 5
6
- Go to Step 2Go 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 tableSystem OK,
Check
Complete

AUTOMATIC TRANSMISSION 5A-101
SSANGYONG MY2002
DTC P1722 Vehicle Type Determination Error
1Perform 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.
Does the scan tool display P1722?
Does the scan tool display DTC P1714.
StepAction Value(s) Yes No
2
3
- Go to Step 2Go to “TCM
Diagnostic
System Check”
- Go to Step 3 Go to
“Diagnostic
Aids”
-Go to
applicable
DTC tableGo to DTC
P1720 table