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DTC No. P0938-00 Hydraulic Oil Temperature Sensor Range/Performance
 
 
 
 
DTC SET CONDITION
Check Condition
  • The PHEV-ECU power supply voltage is more than 10.0 volts.
  • The power supply mode of the electric motor switch is ON.
  • Drive the vehicle at more than 40 km/h (25 mph)
  • DTC No. P0939-00 and P0940-00 are not detected from the PHEV-ECU
  • Time after above conditions satsify is more than 300 seconds
  • The vehicle status is in Propulsion system active more than 600 seconds
Judgment Criterion
  • The transaxle fluid temperature sensor stuck diagnosis status is judged as malfunction.
 
 
TROUBLESHOOTING HINTS
  • Damaged wiring harness and connectors
  • •Malfunction of the transaxle fluid temperature sensor
  • 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 data list
Check the following PHEV-ECU data list.
  • Item No. 6810: Transaxle fluid temperature
OK:
  • Approximately 3.5 V [at 20°C (68°F)]
  • Approximately 2.0 V [at 60°C (140°F)]
Is the check result normal?
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).
 
2.Check the transaxle fluid temperature sensor.
Check the transaxle fluid temperature sensor (Refer to Front Transaxle – On-vehicle Service TRANSAXLE FLUID TEMPERATURE SENSOR CHECK).
Is the check result normal?
Replace the transaxle fluid temperature sensor (Refer to Transaxle Overhaul – Front Transaxle DISASSEMBLY AND ASSEMBLY).
 
3.Check of open circuit in OTSG line between PHEV-ECU and transaxle fluid temperature sensor.
  1. Disconnect the PHEV-ECU connector and the tranaxle fluid temperature sensor connector, and measure at the wiring harness side.
  2. Check the OTSG line for continuity.
    OK: Continuity exists (2 Ω or less)
Is the check result normal?
Repair it.
 
4.Check wiring harness and connectors for damage.
Check the following wirirng harness for damage.
  • OTS line between the PHEV-ECU and the transaxle fluid temperature sensor
  • OTSG line between the PHEV-ECU and the transaxle fluid temperature sensor
Is the check result normal?
Repair it.
 
5.M.U.T.-IIISE data list
Check the following PHEV-ECU data list.
  • Item No. 6810: Transaxle fluid temperature
OK:
  • Approximately 3.5 V [at 20°C (68°F)]
  • Approximately 2.0 V [at 60°C (140°F)]
Is the check result normal?
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).
Replace the PHEV-ECU (Refer to PHEV-ECU REMOVAL AND INSTALLATION).