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Home >> Honda >> 2021 >> Pilot EX, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> Engine Control System / Engine Mechanical - Service, Testing & Troubleshooting >> System Description >> Auto Idle Stop (2019 2020 2021) >> Auto Idle Stop Control Signal >> Transmitting and Received Signals to/from PCM
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Transmitting and Received Signals to/from PCM

Target unit, sensor and switch Transmitting Signal Received Signal Remarks
Related control units System malfunction signal - See detailed information
Idle stop off switch Auto idle stop cancellation signal - -
Snow switch Snow mode selected signal - -
Hood latch switch Hood open/close signal - -
Driver's seat belt switch Seat belt buckle/unbuckle signal - -
EPS control unit
  • Steering torque signal
  • Steering angle information*
- -
SBW shifter control module Shift position information - -
TCM (Countershaft speed sensor) Vehicle speed/vehicle speed record information - The signal is sent to the TCM. The TCM sends the determination of the auto idle stop system to the PCM based on the signal.
TCM (ATF temperature sensor) ATF temperature information - The signal is sent to the TCM. The TCM sends the determination of the auto idle stop system to the PCM based on the signal.
TCM Transmission status information
  • Execution/prohibition signal of the auto idle stop
Engine status information
  • Engine speed
-
Brake pedal position switch Brake pedal on/off signal - -
VSA modulator-control unit
  • Hydraulic control operating information
  • Vehicle speed information
  • Master cylinder pressure information
  • Starting Assist Brake Function information
  • Vehicle inclination angle information
Starting Assist Brake request signal See detailed information
SRS unit Vehicle inclination angle information - -
Brake booster pressure sensor Brake booster pressure information - -
Accelerator pedal module (APP sensor) Accelerator pedal on/off signal - -
Engine coolant temperature (ECT) sensor Engine temperature information - -
Barometric pressure (BARO) sensor Atmospheric pressure (altitude) information - -
Climate control unit Auto idle stop permission signal by the climate control system - See Detail Information of the Control or Communication Signal
Starter - Starter operating command signal See Detail Information of the Control or Communication Signal
12 volt battery sensor 12 volt battery status information
  • Internal resistance value
  • Battery fluid temperature
  • Current value
  • Voltage value
- See Detail Information of the Control or Communication Signal
DC-DC converter Unit quality information - See detailed information
Gauge control module -
  • Indicator lamps turn on/off signal
  • Indicator lamps blinks signal
During auto idle stop:
  • Auto idle stop system indicator (green) is turned on
  • Engine oil pressure Warning indicator goes off
  • Charging system indicator goes off

When the idle stop system off switch is on:

  • Auto idle stop system indicator (amber) is turned on

When the idle stop system is failure:

  • Auto idle stop system indicator (amber) blinks
Injector - Fuel injection stop/injection command signal -
Alternator - Alternator operating command -

*: USA and Canada models