FixVault
Home › Chevrolet › 2005 › Impala SS › Repair and Diagnosis › Transmission › Automatic Trans › Shift Interlock System › Diagnostic Information and Procedures › DTC B2712 › Test Description

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. 2:  Listen for an audible click when the A/T shift lock control solenoid operates. Command both the ON and OFF states. Repeat the commands as necessary.
  2. 3:  Tests for voltage at the A/T shift lock control solenoid.
  3. 4:  Verifies that the BCM is providing ground to the A/T shift lock control solenoid.
  4. 5:  Tests if ground is constantly being applied to the A/T shift lock control solenoid.
  5. 16:  The BCM must be programmed for the vehicle regular production option (RPO) configuration.
DTC B2712

Step Action Yes No
Schematic Reference:  Automatic Transmission Shift Lock Control Schematics  
Connector End View Reference:  Automatic Transmission Shift Lock Control Connector End Views   or  Computer/Integrating Systems Connector End Views  in Computer/Integrating Systems
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2 
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, command the automatic transmission shift lock control solenoid ON and OFF.
Does the automatic transmission (A/T) shift lock control solenoid turn ON and OFF with each command?		 Go to Diagnostic Aids Go to Step 3 
3 
  1. Turn OFF the ignition.
  2. Disconnect the A/T shift lock control solenoid.
  3. Turn ON the ignition, with the engine OFF.
  4. Probe the A/T shift lock control solenoid supply voltage circuit at the A/T shift lock control solenoid with a test lamp that is connected to a good ground.
Does the test lamp illuminate?		 Go to Step 4  Go to Step 8 
4 
  1. Connect a test lamp between the control circuit of the A/T shift lock control solenoid and the A/T shift lock control solenoid supply voltage circuit of the A/T shift lock control solenoid.
  2. With a scan tool, command the A/T shift lock control solenoid ON and OFF.
Does the test lamp turn ON and OFF with each command?		 Go to Step 11  Go to Step 5 
5  Does the test lamp remain illuminated with each command? Go to Step 7  Go to Step 6 
6 Test the control circuit of the A/T shift lock control solenoid for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 17  Go to Step 12 
7 Test the control circuit of the A/T shift lock control solenoid for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 17  Go to Step 12 
8
  1. Turn OFF the ignition.
  2. Connect a test lamp between the ignition 1 voltage circuit at the A/T shift lock control switch and a good ground.
  3. Turn ON the ignition, with the engine OFF.
Does the test lamp illuminate?		 Go to Step 9  Go to Step 13 
9 Test the A/T shift lock control solenoid supply voltage circuit for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 17  Go to Step 10 
10
  1. Inspect for proper A/T shift lock control switch adjustment. Refer to Stop Lamp Switch Adjustment in Lighting Systems.
  2. Inspect for poor connections at the A/T shift lock control switch. 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 17  Go to Step 14 
11 Inspect for poor connections at the A/T shift lock control solenoid. 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 17  Go to Step 15 
12 Inspect for poor connections at the harness connector of the body control module (BCM). 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 17  Go to Step 16 
13 Repair the ignition 1 voltage circuit of the A/T shift lock control switch. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?		 Go to Step 17  -
14 Replace the A/T shift lock control switch. Refer to Stop Lamp Switch Replacement in Lighting Systems.
Did you complete the replacement?		 Go to Step 17  -
15 Replace the A/T shift lock control solenoid. Refer to Automatic Transmission Shift Lock Actuator Replacement (Floor Shift)  or Automatic Transmission Shift Lock Actuator Replacement (Column Shift) .
Did you complete the replacement?		 Go to Step 17  -
16 
IMPORTANT: Perform the setup procedure for the BCM.
Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.Did you complete the replacement?		 Go to Step 17  -
17
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?		 Go to Step 2  System OK
About FixVault