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Home >> Mercury >> 2009 >> Mariner Base, 2.5 7, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Controls - Powertrain DTC Charts & Descriptions - (Hybrid)) >> Diagnostic Trouble Code (DTC) Charts and Descriptions >> DTC P2535: Ignition Switch Run/Start Position Circuit High

DTC P2535: Ignition Switch Run/Start Position Circuit High

WARNING: This page is about a different variant/trim than selected.
P2535: IGNITION SWITCH RUN/START POSITION CIRCUIT HIGH

Description:  The powertrain control module (PCM) carries out a logic check on the ISP-R and ISP-R/S circuits. If the ISP-R/S circuit stays high longer than a calibrated amount of time, or is high when the PCM when it is expected to be low, this DTC sets.
Possible Causes: 
  • ISP-R/S circuit short to VPWR
  • Damaged ignition switch
  • PCM
Diagnostic Aids:  Monitor the KEYST PID. The PID should indicate RUN when the key is in the ON position and RUN/START when the key is in the START position.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST B .