Inspection Procedure

1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch to the ON position.
3. Select the following menu items: DIAGNOSIS / ENHANCED OBDII / ENGINE / DTC INFO / CURRENT CODES.
4. Read output DTC. (See DTC CHECK / CLEAR )

   Result: 

   DTCs are output 

YES: GO TO  DTC CHART 

NO: Go to next step 

1. Turn the ignition switch off, move the shift lever to the P position, and lift up the vehicle.
2. Turn the crank pulley by hand to check if the crankshaft rotates.
   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.

   OK: The crankshaft rotates. 

NG: GO TO step   10 

OK: Go to next step 

1. Disconnect the H31 connector from the HV control ECU.
2. Disconnect the C3 crankshaft position sensor connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for open) 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   NE+ (H31-25) - NE+ (C3-1)	Below 1 Ω
   NE-(H31-24) - NE- (C3-2)	Below 1 Ω

   Standard Resistance (Check for short) 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   NE+ (H31-25) or NE+ (C3-1) - Body ground	10 kΩ or higher
   NE- (H31-24) or NE- (C3-2) - Body ground	10 kΩ or higher

   NOTE: Turning the ignition switch to the ON position with the HV control ECU connectors disconnected causes other DTCs to be stored. Clear the DTCs after performing the inspection.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 1: Disconnecting H31 Connector From HV Control ECU

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step 

1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch to the ON position.
3. Select the following menu items: DIAGNOSIS / OBD/ MOBD / HV ECU / DTC INFO / CURRENT CODES.
4. Check for HV system DTCs, freeze frame data, and diagnosis information and note them down.

NEXT: Go to next step 

1. Select the following menu items: DIAGNOSIS / OBD/ MOBD / HV ECU / DTC INFO / CLEAR CODES.
2. Clear the DTCs of the HV system.

NEXT: Go to next step 

1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch to the ON position.
3. Select the following menu items: DIAGNOSIS / OBD/ MOBD / HV ECU / DATA LIST / MG1 REV and ENGINE SPD.
4. Put the vehicle into the READY-on state.

   OK: The READY light comes on. 

   HINT:

   If the READY light does not come on and the reading on the intelligent tester shows DTC P3147-239 (HV transaxle input malfunction [shaft damaged]), or the READY light comes on and the Generator turns but the engine does not crank, replace the HV transaxle assembly.

NG: REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY 

OK: Go to next step 

1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch to the ON position.
3. Select the following menu items: DIAGNOSIS / OBD/ MOBD / HV ECU / DATA LIST / MG1 REV and ENGINE SPD.
4. 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 intelligent tester shows DTC P3147-239 (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: Go to next step 

1. Connect the intelligent tester to the DLC3.
2. 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 intelligent tester shows DTC P3147-602 (HV transaxle output malfunction), replace the HV transaxle assembly.

NG: REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY 

OK: Go to next step 

1. Connect the intelligent tester to the DLC3.
2. 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 intelligent tester shows DTC P3147-241 (HV transaxle input malfunction [input damper]), replace the transmission input damper assembly.

NG: REPLACE TRANSMISSION INPUT DAMPER ASSEMBLY 

OK: PERFORM SIMULATION TEST. IF SYMPTOM IS NOT REPRODUCED, REPLACE ENGINE, HV TRANSAXLE AND HV CONTROL ECU 

1. Turn the ignition switch off and move the shift lever to the N position.
2. Lift up the vehicle.
3. Turn the crank pulley by hand to check if the front tires rotate.
   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.

   OK: The front tires rotate. 

NG: REPAIR OR REPLACE ENGINE 

OK: REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY