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DTC No. P2123-00 Accelerator Pedal Position Sensor 1 Circuit High
 
 
 
 
MONITOR EXECUTION
Continuous
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC set in memory for the item monitored below)
  • Not applicable
Sensor (The sensor below is determined to be normal)
  • Not applicable
 
 
DTC SET CONDITIONS
Logic Flow Chart
 
 
Check Condition
  • The PHEV-ECU power supply voltage is 9.0 volts or more.
  • EV power source relay drive signal is ON
Judgment Criterion
  • The accelerator pedal position sensor (APPS) (main) voltage is more than 4.82 volts for 1 second or more.
 
 
OBD-II DRIVE CYCLE PATTERN
 
 
TROUBLESHOOTING HINTS
  • Damaged wiring harness and connectors
  • Malfunction of the accelerator pedal (accelerator pedal position sensor 1)
  • Malfunction of the PHEV-ECU
 
 
DIAGNOSIS
Required Special Tools:
  • MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
  • MB992745: V.C.I.-Lite main harness A
  • MB992747: V.C.I.-Lite USB cable short
  • MB992748: V.C.I.-Lite USB cable long
  • MB991223: Wiring harness set
  • MB992006: Extra fine probe
1.Check of continuity at accelerator pedal connector (APG1 terminal)
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Check the continuity between the accelerator pedal connector (APG1 terminal) and body ground.
OK: Continuity exists (2 Ω or less)
Is the check result normal?
 
2.Check of open circuit in APG1 line between PHEV-ECU and accelerator pedal
Is the check result normal?
Repair the connector(s) or wiring harness. Then,
 
3.Check of continuity at accelerator pedal connector (APS1 terminal, APV1 terminal)
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Check the continuity between the accelerator pedal connector (APS1 terminal) and accelerator pedal connector (APV1 terminal).
OK: No continuity
Is the check result normal?
Repair the connector(s) or wiring harness in APS1 and APV1 lines between the PHEV-ECU connector and accelerator pedal connector. Then,
 
4.Check wiring harness and connectors for damage.
Check the wiring harness and connectors in APV1 line between the PHEV-ECU connector and accelerator pedal connector for damage.
Is the check result normal?
Repair the connector(s) or wiring harness. Then,
 
5.Check wiring harness and connectors for damage.
Check the wiring harness and connectors in APS1 line between the PHEV-ECU connector and accelerator pedal connector for damage.
Is the check result normal?
Repair the connector(s) or wiring harness. Then,
 
6.Voltage measurement at PHEV-ECU connector (APS1 terminal, APG1 terminal)
(1) Measure the PHEV-ECU connector side by backprobing.
(2) Measure the voltage between the PHEV-ECU connector (APS1 terminal) and PHEV-ECU connector (APG1 terminal).
Check conditionNormal condition
Accelerator pedal: Fully releasedApproximately 0.76 V
Accelerator pedal: Fully depressedApproximately 4.57 V
Is the check result normal?
Replace the accelerator pedal (Refer to Engine Control - Accelerator Pedal ACCELERATOR PEDAL REMOVAL AND INSTALLATION). Then,
 
7.Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to OBD-II Drive Cycle OBD-II DRIVE CYCLE.
(2) Check the DTC.
Is the DTC set?
Replace the PHEV-ECU (Refer to PHEV-ECU REMOVAL AND INSTALLATION). Then,
The trouble can be an intermittent malfunction (Refer to General Information - How to Use Troubleshooting/Inspection Service Points, How to Cope with Intermittent Malfunctions HOW TO COPE WITH INTERMITTENT MALFUNCTIONS).
 
8.Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to OBD-II Drive Cycle OBD-II DRIVE CYCLE.
(2) Check the DTC.
Is the DTC set?
Retry the troubleshooting.
The procedure is complete.