2010 Cadillac Truck Escalade RWD V8-6.2L Page 2492

2010 Cadillac Truck Escalade RWD V8-6.2L Page 2492

Circuit/System Description

The accelerator pedal assembly contains 2 accelerator pedal position (APP) sensors. The APP sensors are mounted to the accelerator pedal

assembly and are not serviceable. The APP sensors provide a signal voltage that changes relative to pedal position. The engine control module

(ECM) supplies each APP sensor with a 5 V reference circuit, a low reference circuit, and a signal circuit.

Conditions for Running the DTC

P2120, P2122, P2123, P2125, P2127, P2128

* DTC P0641 or P0651 is not set.

* The ignition is ON or the engine is running.

* The run/crank or powertrain relay voltage is greater than 6.0 V and reduced power is not active.

* DTC P2120, P2122, P2123, P2125, P2127, P2128 run continuously when the above conditions are met.

P2138

* DTC P0641, P0651, P2120, P2125 are not set.

* The ignition is ON or the engine is running.

* The run/crank or powertrain relay voltage is greater than 6.0 V and reduced power is not active.

* DTC P2138 runs continuously when the above conditions are met.

Conditions for Setting the DTC

P2120

The APP sensor 1 voltage is less than 0.46 V or greater than 4.7 V for greater than 0.2 s.

P2122

The ECM detects that the APP sensor 1 voltage is less than 0.46 V for greater than 0.2 s.

P2123

The ECM detects that the APP sensor 1 voltage is greater than 4.75 V for greater than 0.2 s.

P2125

The APP sensor 2 voltage is less than 0.32 V or greater than 2.6 V for greater than 0.2 s.

P2127

The ECM detects that the APP sensor 2 voltage is less than 0.32 V for greater than 0.2 s.

P2128

The ECM detects that the APP sensor 2 voltage is greater than 2.6 V for greater than 0.2 s.

P2138

The voltage difference between APP sensor 1 and APP sensor 2 exceeds a predetermined value for greater than 1 s.

Action Taken When the DTC Sets

* DTCs P2120, P2122, P2123, P2125, P2127, P2128, and P2138 are Type A DTCs.