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DTC No. P1A23-92 Engine/Generator Control System RPM - Higher Than Expected
 
 
 
 
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)
  • Injection valve monitor
  • Misfire monitor
  • Electronic throttle valve control monitor
  • Throttle position sensor (TPS) source monitor
  • Electronic throttle valve relay monitor
  • Torque monitor
  • Electronic throttle valve motor monitor
  • Engine control module (ECM) monitor
  • EV CAN monitor
Sensor (The sensor below is determined to be normal)
  • Mass airflow sensor
  • Manifold absolute pressure sensor
  • Intake air temperature sensor
  • Engine coolant temperature sensor
  • Throttle position sensor (TPS)
  • Crankshaft position sensor
  • Camshaft position sensor
  • Barometric pressure sensor
 
 
DTC SET CONDITIONS
Logic Flow Chart
 
 
Check Condition
  • When the driving mode is the series driving mode
  • When the cold strategy idle control status is OFF
  • The engine coolant temperature is 20°C (68°F) or more.
  • The difference of target generator speed is less than 1,238 rpm/sec.
Judgment Criterion
  • When the target rotation speed of the generator is more than 3,219 r/min (the target rotation speed of the engine is more than 1,300 r/min), and when a state where the engine torque correction amount is within the specified range continues for 10 seconds.
 
 
OBD-II DRIVE CYCLE PATTERN
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the MFI system
  • Malfunction of the power drive unit (GCU)
  • 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
1.M.U.T.-IIISE other system DTC
Check whether the power drive unit sets the DTC. [Refer to Electric Motor Control Unit (EMCU) and Motor (Electric Motor Unit) - Troubleshooting DIAGNOSTIC TROUBLE CODE CHART].
Is the DTC set?
Troubleshoot the set DTC. Then,
 
2.Diagnosis of trouble symptom
Perform the "Exhaust gas" inspection in the inspection chart for trouble symptoms of the ECM [Refer to Multiport Fuel Injection (MFI) - Troubleshooting SYMPTOM CHART].
Is the check result normal?
Correct the defective item. Then,
 
3.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).
 
4.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 inspection is complete.