2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2854
Circuit/System Description
The accelerator pedal assembly contains two accelerator pedal position (APP) sensors. The APP sensors are mounted in the pedal assembly and are
not serviceable. The APP sensors provide a signal voltage that changes relative to the position of the accelerator pedal. The Engine Control Module
(ECM) supplies a separate 5 V reference and low reference circuit for each of the APP sensors.
Conditions for Running the DTC
P2120, P2122, P2123, P2125, P2127, P2128
* DTC P0641 and P0651 are not set.
* The run/crank or powertrain relay voltage is greater than 6 V and reduced power is not active.
* The ignition is in the Unlock/Accessory or Run position.
* 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 system voltage is greater than 5.23 V.
* The ignition is in the Unlock/Accessory or Run position.
* DTC P2138 runs continuously when the above conditions are met.
Conditions for Setting the DTC
P2120
The APP sensor 1 voltage is less than 0.325 V, or greater than 4.75 V for greater than 0.4 s.
P2122
The ECM detects that the APP sensor 1 voltage is less than 0.325 V for greater than 0.4 s.
P2123
The ECM detects that the APP sensor 1 voltage is greater than 4.75 V for greater than 0.4 s.
P2125
The APP sensor 2 voltage is less than 0.325 V, or greater than 4.75 V for greater than 0.4 s.
P2127
The ECM detects that the APP sensor 2 voltage is less than 0.325 V for greater than 0.4 s.
P2128
The ECM detects that the APP sensor 2 voltage is greater than 4.75 V for greater than 0.4 s.
