P0A90-241
P112 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0A90-239: Drive Motor "A" Performance
DTC P0A90-239 - Drive Motor "A" Performance
DTC P0A90-241 - Drive Motor "A" Performance
DTC P0A90-602 - Drive Motor "A" Performance
DESCRIPTION
The HV transaxle consists of a planetary gear unit, MG1 and MG2.
A gear unit uses the planetary gear to split engine output in accordance with a driving request during driving the vehicle or charging its internal HV battery.
The MG2 provides assistance to the engine output while increasing the drive force of the vehicle. Furthermore, the MG2 effects regenerative braking by converting the energy (which is consumed in the form of heat during normal braking) into electrical energy and recovering it into the HV battery. Through regenerative braking, as well as decelerating the vehicle, the MG2 generates high-voltage electrical power which is used for the purpose of charging the HV battery.
The MG1 supplies electrical power, which is used for charging the HV battery or for driving the MG2. It also has a stepless transmission function to control the transaxle by regulating the amount of generation of electrical energy, which effectively varies the MG1 speed. In addition, the MG1 is used as a starter motor to start the engine.
The transmission input damper absorbs the shock that accompanies transmission of the drive force from the engine.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT: If these DTCs are output, the gears in the transaxle may have seized, or foreign objects have been caught in either of them. therefore, check the ATF.
PROCEDURE
1. READ OUTPUT DTC (ENGINE)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch ON (IG).
(c) Enter the following menus: Powertrain / Engine Control / Trouble Codes.
(d) Check if DTCs are output.
Result:
DTCs are output
YES -- GO TO RELEVANT DTC CHART
NO -- Continue to next step.
2. CHECK CRANKSHAFT PULLEY REVOLUTION
(a) Turn the power switch OFF.
(b) Jack up the vehicle.
(c) Manually turn the crankshaft pulley to check if the crankshaft rotates.
OK:
The crankshaft rotates
NG -- CHECK FRONT TIRE REVOLUTION
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (ECM - CRANKSHAFT POSITION SENSOR)
(a) Disconnect the E4 ECM connector.
(b) Disconnect the C7 crankshaft position sensor connector.
(c) Measure the resistance between the wire harness side connectors.
Standard resistance (Check for open):
Standard resistance (Check for short):
(d) Reconnect the crankshaft position sensor connector.
(e) Reconnect the ECM connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - ECM)
(a) Disconnect the H16 HV control ECU connector.
(b) Disconnect the E7 ECM connector.
(c) Measure the resistance between the wire harness side connectors.
Standard resistance (Check for open):
Standard resistance (Check for short):
(d) Reconnect the ECM connector.
(e) Reconnect the HV control ECU connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. CHECK AND CLEAR DTC (HV ECU)
(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 and record the DTCs, the freeze frame data, and the information.
(e) Clear the DTCs of the HV ECU.
NEXT -- Continue to next step.
6. CHECK READY LIGHT
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch ON (IG).
(c) Enter the following menus: Powertrain / Engine Control / Data List.
(d) Read the "Generator (MG1) Rev" and "Engine Spd" values.
(e) Turn the power switch ON (READY).
OK:
READY light turns ON
HINT: If the READY light does not turn ON, and the reading on the Techstream shows DTC P0A90 (INF 239) (HV transaxle input malfunction [shaft damaged]), or the MG1 turns but the engine does not crank, replace the hybrid vehicle transaxle assembly.
NG -- REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY
OK -- Continue to next step.
7. CHECK ENGINE REVOLUTION-UP
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch ON (IG).
(c) Enter the following menus: Powertrain / Engine Control / Data List.
(d) Read the "Generator (MG1) Rev" and "Engine Spd" values.
(e) With the READY light turned ON, depress the accelerator pedal for 10 seconds while the shift position is in P.
OK:
The engine revs up
HINT: If the engine does not rev up, and the reading on the Techstream shows DTC P0A90 (INF 239) (HV transaxle input malfunction [shaft damaged]), or the MG1 turns but the engine does not crank, replace the hybrid vehicle transaxle assembly.
NG -- REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY
OK -- Continue to next step.
8. CHECK CREEP MOVEMENT
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch ON (READY).
(c) Jack up the vehicle.
(d) Depress the brake pedal, move the selector lever to the D position, and release the brake pedal.
OK:
The wheels turn (creep movement)
HINT: If the wheels do not turn, and the reading on the Techstream shows DTC P0A90 (INF 602) (HV transaxle output malfunction), replace the hybrid vehicle transaxle assembly.
NG -- REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY
OK -- Continue to next step.
9. CHECK ENGINE ACCELERATION SPEED
(a) Connect the Techstream to the DLC3.
(b) While driving at the vehicle speed of more than 6 mph (10 km/h), fully depress the accelerator pedal to raise the engine speed.
OK:
The engine speed increases smoothly
HINT: If the engine over-revs or the reading on the Techstream shows DTC P0A90 (INF 241) (HV transaxle input malfunction [torque limiter slipping]), replace the transmission input damper.
NG -- REPLACE TRANSMISSION INPUT DAMPER ASSEMBLY
OK -- Continue to next step.
10. CHECK CAUSE OF INCREASE IN REVOLUTION RESISTANCE
(a) Investigate what has caused the revolution resistance of the transaxle to become greater.
(1) Check the ATF.
(2) Check the transaxle coolant.
(3) Check for any breakdowns in the transaxle.
NG -- REPAIR MALFUNCTIONING PARTS OR COMPONENTS
OK -- PERFORM SIMULATION TEST. IF SYMPTOM IS NOT REPRODUCED, REPLACE HV TRANSAXLE AND HV CONTROL ECU
11. CHECK FRONT TIRE REVOLUTION
(a) Turn the power switch ON (IG).
(b) Depress the brake pedal, move the selector lever to the N position.
(c) Jack up the vehicle.
(d) Manually turn the crankshaft pulley to check if the front tires rotate.
OK:
The front tires rotate
NG -- REPAIR OR REPLACE ENGINE ASSEMBLY
OK -- REPAIR OR REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY