Service Manual — page 167 of 715

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FUEL SYSTEM (DFI) 3-77
Vehicle-down Sensor (Service Code 31) (DTC C0064)
(Checking wire for short circuit to power supply wire)
• Connect the ECU connectors.
• Connect the measuring adapter [A] between the harness
  connector and vehicle-down sensor as shown.
   Main Harness [B]
   Vehicle-down Sensor [C]
    Special Tool - Measuring Adapter: 57001-1700
• Connect
  leads.
          a digital meter [D] to the measuring adapter

    Vehicle-down Sensor Output Voltage
      Connections to Adapter:
        Digital Meter (+) → W (sensor Y/G) lead
        Digital Meter (–) → BK (sensor G) lead

• Hold   the sensor vertically.
• with the connector
  Measure     the output voltage with the engine stopped and
                        joined.
• Tilt the sensor 60 ∼ 70° oron.more [A] right or left, then hold
  Turn   the ignition switch
• the sensor almost vertical with the arrow mark pointed up
    [B], and measure the output voltage.
    Output Voltage
     Standard:        With sensor tilted 60 ∼ 70° or more right
                      or left: DC 0.65 ∼ 1.35 V
                      With sensor arrow mark pointed up: DC
                      3.55 ∼ 4.45 V

• Turn   the ignition switch off.
  If the reading is DC 5 V or more, repair or replace the main
    harness.
    If the main harness is no problem, replace the vehicle
    -down sensor.

(Checking wire for short circuit to ground)
• Disconnect:
   ECU Connectors (see ECU Removal)
   Vehicle-down Sensor Connector (see Vehicle-down
   Sensor Removal)
• Check the wiring for short circuit to ground by checking
  continuity between the sensor connector [A] and frame
  ground [B].
    Wiring Continuity Inspection
     Y/G lead (ECU terminal 19) [C] ← → Frame Ground
    If there is continuity, repair or replace the main harness.