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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 16 (Cruise Control System) >> Diagnostic Information and Procedures >> DTC P2162 >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

For intermittent diagnosis, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

DTC P2162

Step Action Yes No
Schematic Reference: Cruise Control Schematics 
Connector End View Reference: Master Electrical Component List in Wiring 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. Turn OFF the ignition.
  2. Install a scan tool.
  3. Raise the vehicle drive wheels. Refer to Lifting and Jacking the Vehicle in General Information.
  4. Start the engine.
  5. Place the transmission into drive.
  6. With a scan tool, observe the Vehicle Speed Sensor parameter in the Body and Accessories, Cruise Control data list.
Does the Vehicle Speed Sensor parameter indicate any vehicle speed?		 Go to Step 4  Go to Step 3 
3 Is DTC P0502 or P0503 current in the PCM? Go to DTC P0502 (3.8L) or to DTC P0503 (3.8L) in Automatic Transaxle 4T65-E Go to Step 5 
4 Test the vehicle speed signal circuit for the following:
  • A short to ground
  • An open
  • A high resistance

Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 9  Go to Step 6 
5 Inspect for poor connections at the harness connector of the PCM. 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 9  Go to Step 7 
6 Inspect for poor connections at the harness connector of the throttle actuator control (TAC) module. 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 9  Go to Step 8 
7 Replace the PCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.
Did you complete the replacement?		 Go to Step 9  -
8 Replace the TAC module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.
Did you complete the replacement?		 Go to Step 9  -
9
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC.
Does the DTC reset?		 Go to Step 2  System OK
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