IMMOBILIZER ANTI-THEFT SYSTEM 9T–15
DAEWOO M–150 BL2
DTC 1600 – ECM Immobilizer Error (No Answer)
Step Action Value Yes No
1
Connect the scan tool using the following procedure:
1. Insert the cartridge into the scan tool.
2. Turn the ignition switch to the OFF position.
3. Connect the scan tool to the data link connector
(DLC).
4. Connect the scan tool’s power cord to the cigar
lighter socket.
5. Turn the ignition ON, but do not start the engine.
Is communication established between the scan tool
and the immobilizer control unit?
–
Go to Step 2
Go to
“Communi-
cation
Between
Immobilizer
and Test
Equipment”
2
Select CURRENT KEY STATUS from the scan tool
menu.
Did the STATUS OF CURRENT KEY message
indicate “KEY IS WRONG”?
–
Go to “Key
Status Errors” Go to Step 3
3
Read the IMMO & ECM ID CODE message that
was displayed after requesting DIAGNOSIS.
Did the message differ from normal message?
Normal Message – ECM MODE: LEARNT
IMMO. MODE: LEARNT
VIN CODE: SAME
–
Go to
“Identification
(ID) Code
Repro-
gramming” Go to Step 4
4
Check for an open serial data wire between the
immobilizer control unit and the ECM.
Was the circuit open?
–
Go to Step 5 Go to Step 6
5
Repair the open serial data wire between the ECM
and the immobilizer control unit.
Is the repair complete?
–
System OK
–
6
1. Replace the ECM.
2. Reprogram the identification (ID) code. Refer to
“Identification (ID) Code Reprogramming” in this
section.
Is the repair complete?
–
System OK
–
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