Dtc P1622: Eeprom Error; Dtc P1623: Unregistered Transponder - Suzuki GRAND VITARA JB416 Service Manual

10C-14 Immobilizer Control System:
Step
14 Immobilizer control module (ICM) check
1) Check immobilizer control module (ICM) referring to
"Inspection of Immobilizer Control Module (ICM) and Its
Circuit: in related manual".
Is immobilizer control module (ICM) normal?

DTC P1622: EEPROM Error

Wiring Diagram
Refer to "Immobilizer Control System Wiring Circuit Diagram: "
Detecting Condition and Trouble Area
Detecting Condition
EEPROM in ECM is corrupted.
Troubleshooting
1) Clear DTC(s) referring to "Diagnostic Trouble Code (DTC) Clearance: in related manual".
2) Turn the ignition switch to OFF position.
3) Check if DTC P1622 is still detected referring to "Diagnostic Trouble Code (DTC) Check: in related manual". 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 in
related manual".
5) Perform "Procedure after ECM Replacement: in related manual".

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 Diagnostic Trouble Code (DTC) confirmation
1) Clear DTC(s) referring to "Diagnostic Trouble Code
(DTC) Clearance: in related manual".
2) Turn the ignition switch to OFF position.
3) Check if any DTC is detected referring to "Diagnostic
Trouble Code (DTC) Check: in related manual".
Is DTC P1623 still detected?
2 Diagnostic Trouble Code (DTC) check
Is any DTC other than P1623 is detected in Step 1?
Action
Action
Yes
Replace ECM with new
one referring to "Engine
Control Module (ECM)
Removal and
Installation: in Section
1C in related manual",
and then perform
"Procedure after ECM
Replacement: in related
manual".
Trouble Area
Internal failure (EEPROM corruption) of ECM
Trouble Area
• Use of the unregistered ignition key
• Immobilizer control module (ICM) faulty
• ECM faulty
Yes
Go to Step 2.
Perform the
troubleshooting
referring to the
corresponding
flowchart, and then go
to Step 3.
No
Replace immobilizer
control module (ICM)
with new one referring
to "Immobilizer Control
Module (ICM) Removal
and Installation: in
related manual".
S5JB0EA304013
S5JB0EA304014
No
The troubleshooting is
completed.
Go to Step 3.