7B1-78 AUTOMATIC TRANSAXLE (M13 ENGINE)
DTC P1702 Internal Control Module Memory Check Sum Error
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.
Troubleshooting
DTC P1703 CAN Invalid Data-TCM
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
1Was “Automatic Transaxle Diagnostic Flow
Ta bl e ” performed?
Go to Step 2. Go to “Automatic Transaxle
Diagnostic Flow Table” in this
section.
2 DTC check.
Check DTC of ECM referring to “DTC check”
in section 6.
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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