5A-68 Automatic Transmission/Transaxle:
DTC P1702: Internal Control Module Memory Check Sum Error
S7RS0B5104035
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
1) Connect scan tool to DLC with ignition switch OFF.
2) Clear DTC in TCM memory.
3) After 10 seconds passed from turning ignition switch ON, check DTC.
DTC Troubleshooting
DTC P1703: Can Invalid Data - TCM
S7RS0B5104036
DTC Detecting Condition and Trouble Area
When abnormality either on the gear shift control signal from ECM is detected by TCM, TCM sets DTC P1703.
DTC Troubleshooting
DTC detecting condition Trouble area
Calculation of current data stored in TCM is not correct comparing with
pre-stored checking data in TCM.
TCM
Step Action Yes No
1 Is DTC P1702 detected after performing “DTC Confirmation
Procedure”?
Faulty TCM.
Replace TCM.
Could be a temporary
malfunction of TCM.
Step Action Yes No
1 Was “A/T System Check” performed? Go to Step 2. Go to “A/T System
Check”.
2 DTC check
1) Check DTC of ECM referring to “DTC Check in Section
1A”.
Is there any DTC(s)?
Go to applicable DTC
diag. flow.
Substitute a known-
good TCM and recheck.
If OK, substitute a
known-good ECM and
recheck.
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