Step 
 | Action 
 | Value(s) 
 | Yes 
 | No 
 | 
1 
 | 
 Important: Inspect all of the keys for matching codes.
 
- Insert the ignition key into the J 35628-A 
.
 
- Turn the J 35628-A 
 ON.
 
- Read the key code on the display of the J 35628-A 
.
 
 
Is the key code a value of 1-15? 
 | 1-15 
 | 
Go to Step 2
      
 | 
Go to Step 5
      
 | 
2 
 | 
- Write down the key code that the J 35628-A 
 displayed.
 
- Turn the J 35628-A 
 OFF.
 
- Connect the J 35628-A 
 to the 2-way ignition switch lock cylinder harness connector at the
base of the steering column.
 
- Insert the ignition key into the ignition switch lock cylinder.
 
- Turn the J 35628-A 
 ON.
 
- Observe the display on the J 35628-A 
.
 
 
Is the key code the same as the code recorded in step 1? 
 | -- 
 | 
Go to Step 3
   
  
 | 
Go to Step 6
   
  
 | 
3 
 | Using a test lamp, frontprobe the
2-way connector at the base of the steering column, between terminal B
(BCM side) and B+. 
Does the test lamp light? 
 | -- 
 | 
Go to Step 4
      
 | 
Go to Step
7
      
 | 
4 
 | 
- Test for an open in circuit 1073.
 
- Test for a short to B+ in circuit 1073.
 
- Test for a short to ground in circuit 1073.
 
- If circuit 1073 is OK, replace the BCM. Refer to 
Body Control Module Replacement 
.
 
 
Is the repair complete? 
 | -- 
 | System OK 
 | -- 
 | 
5 
 | 
- Clean the key.
 
- Retest the key. If the key code is invalid, replace the key. Refer
to
Body Control Module (BCM) Programming/RPO Configuration 
 .
 
 
Did you replace the key? 
 | -- 
 | System OK 
 | -- 
 | 
6 
 | 
 Important: If you repair the lock cylinder harness, the SECURITY indicator will
remain ON for approximately 1 minute.
 Inspect for a poor connection. If the connection is OK, replace the
ignition switch lock cylinder. Refer to 
Ignition Switch Replacement - On Vehicle 
floor 
or 
Ignition Switch Replacement - On Vehicle 
colum . 
Is the repair complete? 
 | -- 
 | System OK 
 | -- 
 | 
7 
 | 
- Disconnect the BCM.
 
- Connect a test lamp between the BCM connector C3 terminal C1
and B+.
 
 
Does the test lamp light? 
 | -- 
 | 
Go to Step 8
      
 | 
Go to Step
9
      
 | 
8 
 | 
- Test for poor connections at BCM connector C3 terminal
C2 and terminal D7.
 
- Test for an open in circuit 1074.
 
- If all connections are OK, replace the BCM. Refer to 
Body Control Module Replacement 
.
 
 
Is the repair complete? 
 | -- 
 | System OK 
 | -- 
 | 
9 
 | Repair the open in circuit in 650. 
Is the repair complete? 
 | -- 
 | System OK 
 | -- 
 |