1A-198 Engine Control System (4JJ1)
DTC P0633 (Flash Code 176)
Circuit Description
The electronically erasable & programmable read only
memory (EEPROM) memorizes immobilizer security
information for communication with the immobilizer
control unit (ICU) and enabling the engine to start. If the
ECM detects immobilizer security information are not
programmed into the ECM, this DTC will set.
Condition for Setting the DTC
• The ECM detects that the immobilizer security
information is not programmed.
Action Taken When the DTC Sets
• The ECM illuminates the SVS lamp when the
diagnostic runs and fails. Refer to DTC Type
Definitions for Action Taken When the DTC Sets -
Type C. (Euro 4 specification)
• The ECM illuminates the MIL when the diagnostic
runs and fails. Refer to DTC Type Definitions for
Action Taken When the DTC Sets - Type A.
(Except Euro 4 specification)
Condition for Clearing the DTC
• Refer to DTC Type Definitions for Condition for
Clearing the SVS Lamp/ DTC - Type C. (Euro 4
specification)
• Refer to DTC Type Definitions for Condition for
Clearing the MIL/ DTC - Type A. (Except Euro 4
specification)
Diagnostic Aids
• Non-programmed ECM sets this DTC.
Circuit/ System Testing DTC P0633
Step Action Value(s) Yes No
1
Did you perform the Diagnostic System Check -
Engine Controls? —
Go to Step 2
Go to Diagnostic
System Check -
Engine Controls
2
1. Install a scan tool.
2. Turn OFF the ignition for 30 seconds.
3. Turn ON the ignition, with the engine OFF.
4. Monitor the DTC Information with a scan tool.
Does the DTC fail this ignition?
—
Go to Step 3
Go to Diagnostic
Aids
3
Program immobilizer security information into the
ECM. Refer to Immobilizer Control Unit &
Programming in Section 9I Security and Lock.
Did you complete the programming?
—
Go to Step 4 —
4
1. Clear the DTCs with a scan tool.
2. Turn OFF the ignition for 30 seconds.
3. Start the engine.
4. Operate the vehicle within the Conditions for
Running the DTC. You may also operate the
vehicle within the conditions that you
observed from the Freeze Frame/ Failure
Records.
Did the DTC fail this ignition?
—
Go to Step 3 Go to Step 5
5
Observe the DTC Information with a scan tool.
Are there any DTCs that you have not diagnosed?
—
Go to DTC List System OK
LG4JJED-WE-0871.book 198 ページ ２００８年４月４日 金曜日 午前９時６分
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