Lexus NX manuals

Lexus NX: Transmission system (P3147-239,P3147-241)

Lexus NX Service Manual / Engine & Hybrid System / 2ar-fxe (hybrid / Battery Control) / Hybrid Control System / Transmission system (P3147-239,P3147-241)

DESCRIPTION

The hybrid vehicle transaxle assembly consists of the planetary gear unit, generator (MG1) and motor (MG2). The planetary gear unit uses a planetary gear to split the engine output into mechanical power and electrical power in accordance with driving requests when the vehicle is being driven or the HV battery is being charged. When accelerating, motor (MG2) assists engine output by increasing vehicle driving force. Motor (MG2) also converts braking energy, which would otherwise be consumed in the form of heat during braking, into electrical energy. This recovered energy is stored in the HV battery. Generator (MG1) supplies power, which is used for charging the HV battery or driving motor (MG2), and also regulates the amount of electricity being generated. In addition, generator (MG1) is used as a starter motor to start the engine.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P3147-239

Transmission system

Drive force from motor (MG2) or the engine cannot be transmitted to the wheels.

The engine, generator (MG1), motor (MG2) or hybrid vehicle transaxle assembly does not run smoothly due to a mechanical malfunction.

(1 trip detection logic)
  • Engine
  • Hybrid vehicle transaxle assembly
  • Hybrid vehicle control ECU
  • Transmission input damper assembly

Does not come on

Master Warning Light:

Comes on

P3147-241

Transmission system

Hybrid vehicle transaxle malfunction (input system lock):

When the vehicle is stopped, an engine cranking signal is sent but the generator (MG1) does not rotate.

The generator (MG1) or the engine does not rotate, or the planetary gear unit is malfunctioning.

(1 trip detection logic)
  • Engine
  • Hybrid vehicle transaxle assembly
  • Hybrid vehicle control ECU
  • Transmission input damper assembly

Does not come on

Master Warning Light:

Comes on
Related Data List

DTC No.

ECU Data List

P3147-239
  • Motor(MG2) Revolution
  • Motor(MG2) Torq
  • M(MG2) Trq Exec Val
  • Generator(MG1) Rev
  • Generator(MG1) Torq
  • G(MG1) Trq Exec Val
  • Engine Revolution
  • Calculate Load

P3147-241

CAUTION / NOTICE / HINT

HINT:

  • If DTC P3147-239 is output, clear the DTCs, perform the following procedure, and check that the same DTC is not output after the repair.
    1. Drive the vehicle at approximately 30 km/h (12 mph) or more for approximately 5 seconds or more using the engine.
  • If DTC P3147-241 is output, clear the DTCs, perform the following procedure, and check that the same DTC is not output after the repair.
    1. With the vehicle stopped and the shift lever in P, turn the power switch on (READY) and gradually depress the accelerator pedal so that the engine starts.

PROCEDURE

1.

CHECK DTC OUTPUT (ENGINE AND ECT)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

(d) Check for DTCs.

Powertrain > Engine and ECT > Trouble Codes

Result

Proceed to

Only DTC P0335 is output or SFI system DTCs are not output.

A

DTC P0335 and other SFI system DTCs are output or any SFI system DTCs other than P0335 are output.

B

(e) Turn the power switch off.

B

GO TO DTC CHART (SFI SYSTEM)

A

2.

CHECK DTC OUTPUT (HYBRID CONTROL)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(d) Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes

(e) Turn the power switch off.

P3147-240 or P3147-242 is also output.

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY

P0A1D is also output.

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

DTCs other than P3147-239 and P3147-241 are not output.

3.

CHECK CRANKSHAFT PULLEY REVOLUTION (P POSITION)

(a) Check that the shift lever is in P.

(b) Lift up the vehicle.

(c) Turn the crankshaft pulley using hand tools to check if the crankshaft can rotate smoothly.

CAUTION:

Do not turn the power switch on (READY) while performing this inspection. Be sure to turn the power switch off before performing this inspection, to prevent the engine from starting.

NOTICE:

Engine compression causes resistance when turning the crankshaft pulley. Check if the crankshaft rotates smoothly (or if it is locked) by manually applying sufficient torque to turn the crankshaft pulley. The torque required to turn the crankshaft pulley should be the same as for a known good vehicle of the same type.

OK:

The crankshaft rotates smoothly.

(d) Lower the vehicle.

NG

GO TO STEP 8

OK

4.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(d) Read and record the DTCs and freeze frame data.

Powertrain > Hybrid Control > Trouble Codes

(e) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

(f) Read and record the DTCs and freeze frame data.

Powertrain > Engine and ECT > Trouble Codes

(g) Clear the DTCs and freeze frame data.

Powertrain > Hybrid Control > Clear DTCs Powertrain > Engine and ECT > Clear DTCs

(h) Turn the power switch off.

NEXT

5.

CHECK ENGINE RACING

Click here

NG

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY

OK

6.

CHECK CREEP MOVEMENT

(a) Turn the power switch on (READY).

(b) Depress the brake pedal, move the shift lever to D, and release the brake pedal.

OK:

The wheels turn (the vehicle creeps forward).

HINT:

If the wheels do not turn and DTC P3147-239 is output, replace the hybrid vehicle transaxle assembly.

(c) Turn the power switch off.

NG

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY

OK

7.

INSPECT ENGINE SPEED

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (READY).

(c) Enter the following menus: Powertrain / Hybrid Control / Data List / Engine Revolution, Motor (MG2) Revolution, Generator (MG1) Rev.

Powertrain > Hybrid Control > Data List

Tester Display

Engine Revolution

Motor(MG2) Revolution

Generator(MG1) Rev

(d) Read the Data List.

(e) Move the shift lever to D.

(f) Fully depress the accelerator pedal when the vehicle speed is 10 km/h (6 mph) or more.

NOTICE:

Perform this test only in an appropriate safe location, in accordance with all local laws.

OK:

The difference between "Engine Revolution" and "0.28 X Generator (MG1) Rev + 0.29 X Motor (MG2) Revolution" is 500 rpm or more and it is maintained for 1 second.

(g) Turn the power switch off.

OK

REPLACE HYBRID VEHICLE CONTROL ECU

NG

REPLACE TRANSMISSION INPUT DAMPER ASSEMBLY

8.

CHECK CRANKSHAFT PULLEY REVOLUTION (N POSITION)

(a) Move the shift lever to N.

(b) Lift up the vehicle.

(c) Turn the crankshaft pulley using hand tools to check if the crankshaft can rotate smoothly.

CAUTION:

Do not turn the power switch on (READY) while performing this inspection. Be sure to turn the power switch off before performing this inspection, to prevent the engine from starting.

NOTICE:

Engine compression causes resistance when turning the crankshaft pulley. Check if the crankshaft rotates smoothly (or if it is locked) by manually applying sufficient torque to turn the crankshaft pulley. The torque required to turn the crankshaft pulley should be the same as for a known good vehicle of the same type.

OK:

The crankshaft rotates smoothly.

(d) Lower the vehicle.

OK

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY

NG

REPAIR OR REPLACE ENGINE

READ NEXT:

 Inverter Coolant Pump Speed Signal (P314A-828)

DESCRIPTION Refer to the description for DTC P0C73-776. Click here The inverter water pump assembly sends the inverter water pump speed (measured value) signal to the hybrid vehicle control ECU. If

 All HV Gate Blocking Range/Performance (P321E-318)

DESCRIPTION The hybrid vehicle control ECU sends a block signal to the motor generator control ECU (MG ECU) to shutdown the power supply to the motor. When the system is not in the on (READY) state, i

 Part of HV Gate Blocking Range/Performance (P321F-319)

DESCRIPTION Refer to the description for DTC P321E-318. Click here DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate P321F-319 Part of HV Gate Block

SEE MORE:

 Inspection

INSPECTION PROCEDURE 1. INSPECT BACK DOOR OPENER SWITCH ASSEMBLY (a) Check the operation of the opener switch. (1) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Switch Condition Specified Condition 1 (UL) - 2 (E) Back doo

 Precaution

PRECAUTION FUEL RECEIVER GAUGE OPERATION (a) OPERATION The combination meter assembly uses the fuel injection volume signal from the ECM, fuel sender gauge assembly to detect the amount of fuel remaining in the fuel tank assembly. Each gauge assembly has a variable resistor whose resistance changes

© 2016-2024 Copyright www.lexunx.com