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Home >> Chevrolet >> 2009 >> HHR SS, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Controls And Fuel - 2.2L Or 2.4L - DTC P0351 To DTC P2544) >> DTC P2120, P2122, P2123, P2125, P2127, P2128, or P2138 (2.4L) >> Component Testing (2.4L) >> Dynamic Test

Dynamic Test

WARNING: This page is about a different variant/trim than selected.
  1. Install a 3A fused jumper wire between the 5-volt reference terminal of the applicable APP sensor and 5 volts. Install a jumper wire between the low reference terminal and a ground.
  2. Sweep the sensor through the entire range while monitoring the voltage between the signal terminal and the low reference terminal with a DMM. The voltage should vary between 0.13-4.87 volts without any spikes or dropouts.
    • If the voltage is not within the specified range or is erratic, replace the accelerator pedal assembly.
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