Inspection Procedure

WARNING: This page is about a different car, the 2006 Lexus RX 400h. However, it is still accessible from the selected car via links, so may be relevant.

READ OUTPUT DTC (SFI SYSTEM)
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 DIAGNOSTIC TROUBLE CODE CHART

NO: GO TO NEXT STEP
CHECK CRANKSHAFT PULLEY REVOLUTION (P POSITION)
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

CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - CRANKSHAFT POSITION SENSOR)

Disconnect the H31connector from the HV control ECU.
Disconnect the C3 crankshaft position sensor connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for open)

HV CONTROL ECU - CRANKSHAFT POSITION SENSOR (CHECK FOR OPEN)

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)

HV CONTROL ECU - CRANKSHAFT POSITION SENSOR (CHECK FOR SHORT)

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

Fig 1: Checking Harness And Connector (HV Control ECU - Crankshaft Position Sensor)

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

OK: GO TO NEXT STEP

RECONFIRM OUTPUT DTC (HV)
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.
CLEAR DTC
1. Select the following menu items: DIAGNOSIS / OBD/ MOBD / HV ECU / DTC INFO / CLEAR CODES.
2. Clear the DTCs of the HV system.
CHECK READY LAMP ON
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
CHECK ENGINE RACING
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
CHECK CREEP MOVEMENT
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
CHECK ENGINE ACCELERATION SPEED
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
CHECK FRONT TIRE REVOLUTION
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