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Home >> Chevrolet >> 2006 >> Cobalt LTZ >> Repair and Diagnosis >> External Pages >> Different car >> Section 701 (Engine Controls And Fuel - 2.0L - DTC P1183 To DTC P2261) >> DTC P1680 >> Test Description

Test Description

WARNING: This page is about a different car, the 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

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

  1. 2:  A DTC P0602 indicates that the PCM is not programmed.
  2. 5:  Resistance is measured at the pedal assembly because a pedal resistance that is lower than the specified value will set this DTC
DTC P1680

Step Action Values Yes No
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to DIAGNOSTIC SYSTEM CHECK - VEHICLE
2  Is DTC P0602 set? - Go to Step 3  Go to Step 5 
3 Program the powertrain control module (PCM). Refer to Service Programming System (SPS) .
Does DTC P0602 reset?		 - Go to Step 4  Go to Step 8 
4
  1. Ensure that all tool connections are secure.
  2. Ensure that the programming equipment is operating correctly.
  3. Ensure that the correct software/calibration package is used.
  4. Attempt to program the PCM. Refer to Service Programming System (SPS) .
Does DTC P0602 reset?		 - Go to Step 7  Go to Step 8 
5 
  1. Turn OFF the ignition.
  2. Disconnect the accelerator pedal connector
  3. Ensure that the pedal is at the rest position.
  4. Measure the resistance from the 5-volt reference of the accelerator pedal assembly to the accelerator pedal position (APP) sensor 2 signal of the accelerator pedal assembly with a DMM. Refer to Circuit Testing .
Is the resistance less than the specified value?		 450 Ω Go to Step 6  Go to Step 7 
6 Replace the accelerator pedal assembly. Refer to Accelerator Pedal Position Sensor Replacement .
Did you complete the replacement?		 - Go to Step 8  -
7 Replace the PCM. Refer to Control Module References for replacement, setup, and programming.
Did you complete the replacement?		 - Go to Step 8  -
8
  1. Clear the DTCs with a scan tool.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
Did the DTC fail this ignition?		 - Go to Step 2  Go to Step 9 
9 Observe the Capture Info with a scan tool.
Are there any DTCs that have not been diagnosed?		 - Go to Diagnostic Trouble Code (DTC) List - Vehicle System OK
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