GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2000 🢒 Eldorado 🢒 Body and Accessories 🢒 Theft Deterrent 🢒 DTC B2711 PASSKey Open/Shorted Pellet After Good Key

Object Number: 333545 Size: MF
Instrument Cluster: Analog Schematics

Circuit Description

When an ignition key is inserted into the ignition switch, the terminals located in the steering column lock cylinder contact the key pellet resistor on the ignition key. The IPC measures the resistance of the key pellet and then measures the resistance to the one stored in the IPCs memory.

Conditions for Setting the DTC

The DTC will set under the following conditions:

    • B2710 indicates that an open or zero resistance value was measured from the key pellet prior to obtaining a valid resistance measurement.
    • B2711 indicates that an open or zero resistance value was measured from the key pellet following a valid resistance measurement.

Action Taken When the DTC Sets
    • When DTC B2710 is set as current, the IPC displays the STARTING DISABLED, REMOVE IGNITION KEY message on the driver message center and prevents the vehicle from starting.
    • When DTC B2711 is set as current, the IPC displays the THEFT SYSTEM PROBLEM, CAR MAY NOT RESTART message on the driver message center and allows the vehicle to continue to run.

Step

Action

Value(s)

Yes

No

1

Did you perform the Theft Deterrent Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Theft Deterrent

2
  1. Install a scan tool.
  2. Turn ON the ignition with the ignition OFF.
  3. Select the Display DTCs function on the scan tool.

Does the scan tool display B2710 as a current DTC?

 

Go to Step 3

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

3

Inspect the ignition key for dirt or obvious damage.

Does the ignition key appear dirty or damaged?

 

Go to Step 9

Go to Step 4

4
  1. Turn off the ignition.
  2. Disconnect connector C202. (Note which half of the connector is the vehicle harness side and which half of the connector is the steering column harness side.
  3. Back out the terminals for the key resistor input circuit and key resistor reference ground circuit from the vehicle harness side of the connector.
  4. Reconnect C202.
  5. Connect a J 35628-A Vats/Passkey Interrogator using terminal adapters from a J 35616 to the key resistor input circuit and key resistor reference ground circuit.
  6. Insert the ignition key into the key code reader on the J 35628-A and note the code on the LCD display.
  7. Turn the rotary switch on the J 35628-A to the same code number as the ignition key.
  8. Attempt to start the vehicle.

Does the vehicle start?

 

Go to Step 6

Go to Step 5

5

Test the following circuits in the vehicle harness portion for an open or a short:

    • The key resistor input circuit
    • The key resistor reference ground circuit

Was a condition found and corrected?

 

Go to Step 12

Go to Step 7

6

Test the following circuits in the steering column harness portion for an open or a short:

    • The key resistor input circuit
    • The key resistor reference ground circuit

Was a condition found and corrected?

 

Go to Step 12

Go to Step 8

7

Inspect for poor connections at the harness connector of the instrument cluster. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

 

Go to Step 12

Go to Step 11

8

Inspect for poor connections at the harness connector of the ignition lock cylinder. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 12

Go to Step 10

9

Clean or replace the ignition key as necessary. Refer to Programming Replacement Keys, Ignition Cylinder, or Powertrain Control Module .

Did you complete the procedure?

 

Go to Step 12

--

10

Replace the ignition lock cylinder. Refer to Steering Column Lock and Ignition Switch Cylinder Replacement - On Vehicle in Steering Wheel and Column.

Did you complete the replacement?

 

Go to Step 12

--

11

Replace the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.

Did you complete the repair?

--

Go to Step 12

--

12
  1. Use the scan tool in order to clear the DTCs.
  2. Attempt to start the vehicle.

Does the DTC reset?

--

Go to Step 2

System OK