P1644

DTC P1644

DTC Detecting Condition and Trouble Area






DTC Troubleshooting

NOTE:

If the keyless start control module is one that was registered with another vehicle (used item), remote controllers cannot be registered. Always install a new keyless start control module when replacement is necessary.


1. DTC check
Check DTC in keyless start control module.
Is DTC B1189 still detected?
YES
Go to B1189 DTC B1189.
NO
Go to Step 2.
2. DTC recheck
Confirm remote controller is in keyless engine start function operation area.
Confirm that ignition mode of keyless push start system is in "OFF".
Push engine switch to change ignition mode to "ON".
Recheck DTC.
Is DTC P1644 still detected?
YES
Go to Step 3.
NO
End. (A possibility of taking out remote controller to outside of the operation area.)
3. Keyless start control module power supply and ground circuit check
Check keyless start control module power supply and ground circuit. Inspection of Keyless Start Control Module and Its Circuits
Is it in good condition?
YES
Go to Step 4.
NO
Repair or replace defective wire harness.
4. ECM registration
Perform "ECM Registration".
Recheck DTC.
Is DTC P1644 still detected?
YES
Go to Step 5.
NO
End. (ECM was not registered)
5. Remote controller registration
Perform "Immobilizer Key Registration".
Confirm that ignition mode of keyless push start system is in "OFF".
Push engine switch to change ignition mode to "ON".
Recheck DTC.
Is DTC P1644 still detected?
YES
Replace ECM and recheck DTC. Service and Repair
If DTC P1644 is still detected, replace keyless start control module and recheck DTC.
NO
End. (Remote controller was not registered)