Dtc P1631 Immobilizer Incorrect Password 1F-360 - Daewoo CIELO EURO III Manual

Step
Perform an On-Board Diagnostic (EOBD) System
Check.
1
Is the system check complete?
1. Turn the ignition ON, with the engine OFF.
2. Install the scan tool.
Is communication established between the scan tool
2
and the immobilizer control unit?
Select IMMOBILIZER DIAGNOSIS STATUS from
the scan tool menu.
3
Does the KEY STATUS message indicate "THIS
KEY IS GOOD?"
1. Select IMMOBILIZER DIAGNOSIS STATUS from
the scan tool menu.
4
2. Read the IMMO & ECM–CODE message.
Does the message ID–CODES ARE SAME appear?
Check for an open serial data wire between the
immobilizer control unit and the
engine control module (ECM) and
5
repair as necessary.
Is the repair complete?
1. Turn the ignition OFF.
2. Replace the ECM.
6
3. Reprogram the identification (ID) code. Refer to
Section 9T, Immobilizer Anti-Theft System.
Is the repair complete?
1. Using the scan tool, clear the DTCs.
2. Start the engine and idle at normal operating
temperature.
7
3. Operate the vehicle within the conditions for
setting this DTC as supported in the text.
Does the scan tool indicate that this diagnostic ran
and passed?
Check if any additional DTCs are set.
8
Are any DTCs displayed that have not been
diagnosed?
DAEWOO T-154 BL2,3
DTC P1631 – Immobilizer Incorrect Password
Action
ENGINE CONTROLS 1F – 361
Value Yes
–
Go to Step 2
–
Go to Step 3
–
Go to Step 4
–
Go to Step 5
–
Go to Step 7
–
Go to Step 7
–
Go to Step 8
Go to
applicable DTC
–
table
No
Go to "On-
Board Diag-
nostic System
Check"
Go to
Section 9T
"Communicatio
n Between
Immobilizer
and Test
Equipment"
Go to
Section 9T
"Key Status
Errors"
Go to
Section 9T
"Identification
(ID) Code Re-
programming"
Go to Step 6
–
Go to Step 2
System OK