SSANGYONG Y200 Manual page 1190

DIAGNOSTIC TROUBLE CODE (DTC) P1718
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.
Step
Perform a Transmission Control Module (TCM)
1
Diagnostic System Check.
Is the check performed?
1. Install the scan tool.
2 2. Turn the ignition ON, with the engine OFF.
Does the scan tool display P1718?
1. Turn the ignition OFF.
3 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.
4
Does the scan tool indicate that this diagnostic has
run and passed?
Check if any DTCs are set.
5
Are there any DTCs displayed or previously recorded
at Step 2 that have not been diagnosed?
SSANGYONG Y200
ROM ERROR
DTC P1718 ROM Error
Action
AUTOMATIC TRANSMISSION 5A-95
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.
Value(s)
- Go to Step 2
- Go to Step 3
- Go to Step 4
- Go to Step 5
applicable
- DTC table
Yes No
Go to "TCM
Diagnostic
System Check"
Go to
"Diagnostic
Aids"
-
Go to Step 2
Go to System OK,
Check
Complete