GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2000 🢒 Eldorado 🢒 Body and Accessories 🢒 Theft Deterrent 🢒 Content Theft Deterrent (CTD) Alarm Mode Inoperative

Step

Action

Value(s)

Yes

No

1

Did you perform the Content Theft Deterrent (CTD) System Check?

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Go to Step 2

Go to Content Theft Deterrent (CTD) System Check

2
  1. Connect the scan tool.
  2. Turn the ignition switch to the ON position.
  3. Set the scan tool to BCM, DATA LIST, INPUT.
  4. Note the trunk tamper switch.

Does the scan tool display ON?

--

Go to Step 4

Go to Step 3

3

Note the DR. DOOR JAMB SW while opening the driver's door.

Does the scan tool display ON with the door open and OFF with the door closed?

--

Go to Step 7

Go to Step 6

4

Does the Scan Tool display DTC B2719 as a current fault?

--

Go to Diagnostic Trouble Code (DTC) List/Type

Go to Step 5

5

Replace the PZM.

Refer to Body Control Module Replacement in Body Control System.

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

--

6
  1. Disconnect the PZM.
  2. Open the driver's door.
  3. Measure the resistance from the PZM connector C1 terminal A10 to ground.

Is the resistance within the specified range?

0-5 ohms

Go to Step 5

Go to Step 8

7

Note the DOOR JAMB SWITCH while opening the right front door.

Does the scan tool display ON with door open and OFF with door closed?

--

Go to Step 9

Go to Step 10

8
  1. Test for an open in CKT 51 (BLK/WHT) and CKT 126 (TAN).
  2. If OK, replace the LH front door lock actuator.

Refer to Door Lock Actuator Replacement in Doors.

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

--

9

Note the KEY CYLINDER SW while operating the driver door lock cylinder switch.

Does the scan tool display ON while the key is turned?

--

Go to Step 14

Go to Step 12

10
  1. Disconnect the PZM.
  2. Open the right front door.
  3. Measure the resistance from the PZM connector C1 terminal A6 to ground.

Is the resistance within the specified range?

0-5 ohms

Go to Step 5

Go to Step 11

11
  1. Test for an open in CKT 151 (BLK/WHT)and CKT 727 (BLU/WHT)
  2. If OK, replace the door lock actuator.

Refer to Door Lock Actuator Replacement in Doors.

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

--

12
  1. Disconnect the PZM.
  2. Measure the resistance from the PZM connector C1 terminal B4 to ground while unlocking the LH front door lock cylinder switch with the key.

Is the resistance within the specified range?

0-5 ohms

Go to Step 5

Go to Step 13

13
  1. Test for an open in CKT 262 (LT GRN)and CKT 51(BLK/WHT)
  2. If OK, replace the LH front door lock cylinder switch.

Refer to Door Lock Cylinder Replacement in Doors.

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

--

14

Note the KEY CYLINDER SW while operating the passenger door lock cylinder switch.

Does the scan tool display ON while the key is turned?

--

Go to Step 5

Go to Step 15

15
  1. Disconnect the PZM.
  2. Measure the resistance from the PZM connector C1 terminal A4 to ground while unlocking the RH front door lock cylinder switch with the key.

Is the resistance within the specified range?

0-5 ohms

Go to Step 5

Go to Step 16

16
  1. Test for an open in CKT 265 (LT GRN)and CKT 151(BLK/WHT)
  2. If OK, replace the RH front door lock cylinder switch.

Refer to Door Lock Cylinder Replacement in Doors.

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

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