1997 SSANGYONG KORANDO display

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

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

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

AUTOMATIC TRANSMISSION 5A-103
SSANGYONG MY2002
DTC P1733 Solenoid 1 Circuit Open
Inspect the wiring for poor electrical connections
at the TCM and at the 10-way transmission
connector. 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.
Solenoid Logic for Static Gear StatesTest Description
The number(s) below refer to the step number(s) on
the Diagnostic Table.
3. Checks if the S1 circuit in the transmission is mal-
functioning.
4. Check cable in the transmission for open / short.
6. Check resistance between S1 terminal A and B.
Standard value is 22 - 30 Ω.
9. Check poor connections of other connectors
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.
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 P1733?
1. Turn the ignition OFF.
2. Disconnect the 10-way transmission connector.
(additional DTCs will set)
3. Connect Solenoid/Thermistor Electrical Tester
(STET) to the 10-way transmission connector of
transmission side and to the good ground.
4. Turn the mode knob of STET to 1 and push the red
button.
Does the bulb of open circuit on the solenoids side of
STET illuminate?
1. Remove the valve cover. Refer to the Transmission
in this section.
2. Check the wiring harness from 10-way transmission
connector to Solenoid 1 (S1) on the valve body for an
open or short to positive and repair as necessary.
Is a repair necessary?
Check the S1 ground circuit for an open and repair as
necessary.
Is a repair necessary?
StepAction Value(s) Yes No
2
3
- Go to Step 4 Go to Step 8
4
5
- Go to Step 2Go to “TCM
Diagnostic
System Check”
- Go to Step 3 Go to
“Diagnostic
Aids”
- Go to Step 11 Go to Step 6
- Go to Step 11 Go to Step 5 Gear
S1 S2
1st
2nd
3rd
4th
Reverse
Neutral
ParkON
OFF
OFF
ON
OFF
OFF
OFFON
ON
OFF
OFF
OFF
OFF
OFF

5A-104 AUTOMATIC TRANSMISSION
SSANGYONG MY2002
DTC P1733 Solenoid 1 Circuit Open (Cont’d)
22 - 30 Ω Go to Step 7 Go to
“Diagnostic
Aids” Using a Digital Volt Meter (DVM), measure the resis-
tance between S1 terminal A and B.
Is the resistance within the specified value?
Replace the S1.
Is the action complete?
1. Disconnect the TCM connector A.
2. Check the wiring harness from 10-way transmission
connector terminal 1 to TCM terminal A3 for an open
or short to positive and repair as necessary.
Is a repair necessary?
Check for a poor connection at the 10-way transmission
connector and TCM connector and repair the malfunc-
tioning 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?
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
8
9
- Go to Step 11 -
11
- Go to Step 11 -
10
12
-Go to
applicable
DTC tableSystem OK,
Check
Complete
Go to Step 11 Go to Step 10 -
- Go to Step 12 Go to Step 2 7 6
- Go to Step 11 Go to Step 9

AUTOMATIC TRANSMISSION 5A-107
SSANGYONG MY2002
DTC P1734 Solenoid 2 Circuit Open
Inspect the wiring for poor electrical connections
at the TCM and at the 10-way transmission
connector. 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.
Solenoid Logic for Static Gear StatesTest Description
The number(s) below refer to the step number(s) on
the Diagnostic Table.
3. Checks if the S2 circuit in the transmission is mal-
functioning.
4. Check cable in the transmission for open / short.
6. Check resistance between S2 terminal A and B.
Standard value is 22 - 30 Ω.
9. Check connections of other connectors
Gear
S1 S2
1st
2nd
3rd
4th
Reverse
Neutral
ParkON
OFF
OFF
ON
OFF
OFF
OFFON
ON
OFF
OFF
OFF
OFF
OFF
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 P1734?
1. Turn the ignition OFF.
2. Disconnect the 10-way transmission connector.
(additional DTCs will set)
3. Connect Solenoid/Thermistor Electrical Tester
(STET) to the 10-way transmission connector of
transmission side and to the good ground.
4. Turn the mode knob of STET to 2 and push the red
button.
Does the bulb of open circuit on the solenoids side of
STET illuminate?
1. Remove the valve cover. Refer to the Transmission
in this section.
2. Check the wiring harness from 10-way transmission
connector to Solenoid 2 (S2) on the valve body for an
open or short to positive and repair as necessary.
Is a repair necessary?
Check the S2 necessarycircuit for an open and repair
as necessary.
Is a repair complete?
StepAction Value(s) Yes No
2
3
- Go to Step 4 Go to Step 8
4
5
- Go to Step 2Go to “TCM
Diagnostic
System Check”
- Go to Step 3 Go to
“Diagnostic
Aids”
- Go to Step 11 Go to Step 6
- Go to Step 11 Go to Step 5