Dtc P1622: Eeprom Reading / Writing Error; Dtc P1623: Unregistered Transponder - Suzuki SX4 Service Manual

DTC P1622: EEPROM Reading / Writing Error

Detecting Condition and Trouble Area
Detecting Condition
EEPROM in ECM is corrupted.
Troubleshooting
1) Clear DTC(s) referring to "DTC Clearance".
2) Turn the ignition switch to OFF position.
3) Check if DTC P1622 is still detected referring to "DTC Check". If still detected, go to the next step. If not, the
troubleshooting is completed.
4) Replace ECM with new one referring to "Engine Control Module (ECM) Removal and Installation in Section 1C".
5) Perform "Procedure after ECM Replacement".

DTC P1623: Unregistered Transponder

Wiring Diagram
Refer to "Immobilizer Control System Wiring Circuit Diagram".
Detecting Condition and Trouble Area
Detecting Condition
Transponder code in the transponder built in the ignition
key is invalid.
Troubleshooting
Step
1 Was "Immobilizer Control System Check" performed?
2 DTC check of ECM
1) Check if any DTC other than P1623 is detected referring
to "DTC Check".
Is DTC other than P1623 detected?
3 Registration of unregistered ignition key with ECM
1) Register the unregistered ignition key with ECM referring
to "Registration of the Ignition Key".
Was registration of ignition key completed?
4 Registration of the spare ignition key
1) Register the spare ignition key referring to "Registration
of the Ignition Key".
Was registration of spare ignition key completed?
Action
Immobilizer Control System:
Trouble Area
Internal failure (EEPROM corruption) of ECM
Trouble Area
• Use of the unregistered ignition key
• ICM
• ECM
Yes
Go to Step 2.
Go to applicable DTC
diag. flow.
Recheck DTC.
Replace ignition key
which cannot be
registered.
10C-14
S7RW0AA304013
S7RW0AA304014
No
Go to "Immobilizer
Control System Check".
Go to Step 3.
Go to Step 4.
Substitute a known-
good ECM and recheck.