LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1139 (Engine Controls - Powertrain DTC Charts And Descriptions (Except Diesel & Hybrid)) >> DTC Diagnosis >> P1436 - A/C Evaporator Air Temperature Circuit Low

P1436 - A/C Evaporator Air Temperature Circuit Low

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2008 Mercury Sable, 2008 Mercury Mountaineer, 2008 Mercury Milan, 2008 Mercury Mariner, and 2008 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.
P1436 - A/C EVAPORATOR AIR TEMPERATURE CIRCUIT LOW

Description:  Indicates the A/CET signal input was less than the self-test minimum. The self-test minimum is 0.13 volts.
Possible Causes: 
  • A/CET circuit short to ground or SIG RTN
  • Damaged A/CET sensor
Diagnostic Aids:  The powertrain control module (PCM) sources a low current 5 volt reference on the A/CET circuit (this voltage can be measured with the sensor disconnected). As the A/C evaporator air temperature changes, the A/CET circuit resistance to SIG RTN (ground) changes (which changes the voltage the PCM detects). When the A/CET signal is detected below the self-test minimum, check for shorts to SIG RTN or ground which would pull the voltage low.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All   refer to PINPOINT TEST DJ .
scientia non olet · About LEMON Manuals