P0A0F-238

P310 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0A0F-238: Engine Failed to Start

DTC P0A0F-238 - Engine Failed to Start

DESCRIPTION

The HV control ECU detects this DTC and effects fail-safe control if the engine or transaxle gear has seized up, or foreign objects have been caught in either of them.

HINT: If this DTC is output, the engine or transmission gear may be seized up. Be sure to check the level of the engine oil, transaxle oil (ATF), and coolant (for Inverter) before inspection.

INSPECTION PROCEDURE

PROCEDURE

1. DTC OUTPUT (SFI SYSTEM)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to the ON position
(c) Select the following menu items: Powertrain / Engine and ECT / Trouble Codes.
(d) Read output DTC. DTC Check / Clear

Result:
DTCs are output
YES -- GO TO DTC CHART
NO -- Continue to next step.
2. CRANKSHAFT PULLEY REVOLUTION (P POSITION)
(a) Turn the ignition switch off, move the shift lever to the P position, and lift up the vehicle.
(b) Turn the crankshaft pulley by hand 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 (HV CONTROL ECU - CRANKSHAFT POSITION SENSOR)
(a) Disconnect the H31 connector from the HV control ECU.
(b) Disconnect the C3 crankshaft position sensor connector.

Standard Resistance (Check for short):

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. INSPECT CRANKSHAFT POSITION SENSOR

(a) Disconnect the C3 crankshaft position sensor connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:

NOTE: "Cold" and "Warm" mean the temperature of the part to be inspected. The temperature range is 14°F (-10°C) to 122°F (50°C) for "Cold" and 122°F (50°C) to 212°F (100°C) for "Warm".

NG -- REPLACE CRANKSHAFT POSITION SENSOR
OK -- Continue to next step.
5. READ OUTPUT DTC (HV)
(a) Connect the Techstream to the DLC3.
(b) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(c) Read output DTC. Hybrid Control System

(d) Confirm and record the DTCs, freeze frame data, and information for the HV system.
NEXT -- Continue to next step.
6. CLEAR DTC (HV)
(a) Connect the Techstream to the DLC3.
(b) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(c) Clear the DTCs of the HV system.
NEXT -- Continue to next step.
7. CHECK READY LIGHT ON
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Select the following menu items: Powertrain / Hybrid Control / Data List / Generator (MG1) Rev, Engine Revolution.
(d) Depress the brake pedal and put the vehicle into the READY-on state.
OK:
The READY light comes on.
HINT:
- If the READY light does not come on or the READY light comes on and the Generator turns but the engine does not crank, replace the HV transaxle assembly.
- If this DTC (P0AF-238) is output, the HV battery may be dead and DTC P3000-388 or P3000-389 may be output. If any of them is output, the battery should be charged with the THS charger.

(e) Refer to the graph for data list confirmation of "Generator (MG1) Rev" and "Engine Revolution".

NG -- REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY
OK -- Continue to next step.
8. CHECK ENGINE RACING
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Select the following menu items: Powertrain / Hybrid Control / Data List / Generator (MG1) Rev, Engine Revolution.
(d) While the READY light is on, depress the accelerator pedal for 10 seconds with the shift lever in the P position.
OK:
The engine revs up.
HINT: If the engine does not rev up and the reading on the Techstream shows DTC P0A90-239 (HV transaxle input malfunction [shaft damaged]), or the Generator turns but the engine does not crank, replace the HV transaxle assembly.

NG -- REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY
OK -- Continue to next step.
9. CHECK CREEP MOVEMENT
(a) Connect the Techstream to the DLC3.
(b) Depress the brake pedal, move the shift lever to the D position, and release the brake pedal.
OK:
The wheels turn (creeping along).
HINT: If the wheels do not turn and the reading on the Techstream shows DTC P0A90-602 (transaxle output malfunction), replace the HV transaxle assembly.

NG -- REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY
OK -- Continue to next step.
10. ENGINE 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:
Engine speed increases smoothly.
HINT: If the engine over-revs or the reading on the Techstream shows DTC P0A90-241 (transaxle input malfunction [torque limiter slipping]), replace the transmission input damper.

NG -- REPLACE TRANSMISSION INPUT DAMPER ASSEMBLY
OK -- PERFORM SIMULATION TEST. IF SYMPTOM IS NOT REPRODUCED, REPLACE ENGINE, HV TRANSAXLE AND HV CONTROL ECU
11. CHECK FRONT TIRE REVOLUTION
(a) Lift up the vehicle.
(b) Move the shift lever to the N position with the ignition switch off.
CAUTION: Do not put the vehicle into the READY-on state while performing this inspection. Be sure to turn the ignition switch off because the engine may start.
(c) Turn the crank pulley by hand to check if the front tires rotate.
OK:
The front tires rotate.
NG -- CHECK AND REPAIR ENGINE
OK -- REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY