PR25DD engine

ECM supplies a voltage of 5 V to some of the sensors systematically divided into 3groups, respectively. Accordingly, when a short circuit develops in a sensor power source, a malfunction may occur simultaneously in the sensors belonging to the same group as the short-circuited sensor.

Sensor power supply 1

• APP sensor 1
• Crankshaft position sensor
• Exhaust camshaft position sensor
• Manifold absolute pressure (MAP) sensor
• Intake manifold runner control valve position sensor
• EGR volume control valve
• Throttle position sensor

Sensor power supply 2

• APP sensor 2
• Intake camshaft position sensor
• Intake air temperature sensor
• Refrigerant pressure sensor
• Engine oil pressure sensor
• Fuel rail pressure sensor
• Battery current sensor

Sensor power supply 3

• EVAP control system pressure sensor

1. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT-1 
   1. Turn ignition switch OFF.
   2. Disconnect EVAP control system pressure sensor harness connector.
   3. Turn ignition switch ON.
   4. Check the voltage between EVAP control system pressure sensor harness connector and ground.

      +		-	Voltage (Approx.)
      EVAP control system pressure sensor
      Connector	Terminal
      B63 *1 B64 *2	3	Ground	5V

      *1: Without all wheel drive

      *2: With all wheel drive

   Is the inspection result normal?

   YES

   INSPECTION END

   NO

   GO TO 2.

2. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR SUPPLY CIRCUIT-2 
   1. Turn ignition switch OFF.
   2. Disconnect ECM harness connector.
   3. Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector.

      +		+		Continuity
      EVAP control system pressure sensor		ECM
      Connector	Terminal	Connector	Terminal
      B63 *1 B64 *2	3	E31	135	Existed

      *1: Without all wheel drive

      *2: With all wheel drive

   Is the inspection result normal?

   YES

   GO TO 3.

   NO

   Repair open circuit.

3. CHECK SENSOR POWER SUPPLY 3 CIRCUIT 
   1. Disconnect following sensors harness connector.
   2. Check harness for short to power and short to ground, between the following terminals.

   ECM		Sensor
   Connector	Terminal	Name	Connector	Terminal
   E31	135	EVAP control system pressure sensor	B63 *1 B64 *2	3

   *1: Without all wheel drive

   *2: With all wheel drive

   Is the inspection result normal?

   YES

   GO TO 4.

   NO

   Repair short to ground or short to power in harness or connectors.

4. CHECK COMPONENTS 

   Check the following.

   • EVAP control system pressure sensor (Refer to Component Inspection .)

   Is the inspection result normal?

   YES

   Refer to Inspection .

   NO

   Replace malfunctioning component.