Service Manual (KLZ1000C) — page 641 of 762

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SELF-DIAGNOSIS SYSTEM 17-39
Accelerator Position Sensor (Service Code 18) (DTC P2120, P2121, P2123,
P2125, P2128)
 If the reading is out of the standard, remove the ECU and
 check the wiring for continuity between harness connec-
 tors.
○Disconnect the ECU and sensor connectors.
 Wiring Continuity Inspection
  ECU Connector [A] ←→
      Accelerator Position Sensor Connector [B]
       (1) ECU Terminal 74 [C] ←→ Sensor Terminal [D]
            ECU Terminal 127 [E] ←→ Sensor Terminal [F]
       (2) ECU Terminal 76 [G] ←→ Sensor Terminal [H]
            ECU Terminal 126 [I] ←→ Sensor Terminal [J]
 If the wiring is good, check the ECU for its ground and
 power supply (see ECU Power Supply Inspection(3-39)).
 If the ground and power supply are good, replace the
 ECU.
Accelerator Position Sensor Output Voltage
Inspection
• Measure   the output voltage at the accelerator position
  sensor in the same way as input voltage inspection, note
 the following.
○Disconnect the accelerator position sensor connector and
 connect the suitable measuring leads [A] between these
 connectors.
  Main Harness [B]
  Accelerator Position Sensor [C]
  Digital Meter [D]
 Accelerator Position Sensor Output Voltage
   Connections to Adapters:
     (1) Digital Meter (+) → Sensor W/G lead
         Digital Meter (–) → Sensor W/BK lead
     (2) Digital Meter (+) → Sensor Y/G lead
         Digital Meter (–) → Sensor Y/BK lead

• Measure   the output voltage with the engine stopped and
  with the connector joined.
• Turn the ignition switch on.
 Output Voltage
  Standard: (1) DC 0.9  1.1 V at ordinary throttle
                position
                  (2) DC 0.9  1.1 V at ordinary throttle
                      position

                             NOTE
 ○Open the throttle, confirm the output voltage will be
   raise.

• Turn  the ignition switch off.
  If the reading is out of the standard, replace the right
 switch housing.