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.

CLEAR 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. Read and record the DTCs and freeze frame data.
5. Select the following menu items: DIAGNOSIS / OBD/ MOBD / HV ECU / DTC / CLEAR.
6. Clear the DTCs. (See DTC CHECK / CLEAR )

READ VALUE OF INTELLIGENT TESTER (SHIFT POSITION)

Connect the intelligent tester to the DLC3.
Turn the ignition switch to the ON position.
Select the following menu items: DIAGNOSIS / OBD/ MOBD / HV ECU / DATA LIST / SHIFT POSITION.

While slowly moving the shift lever from the P to B position, then back to P, read the data list (shift position) displayed on the intelligent tester.

HINT:

Be sure to slowly move the shift lever.

Result

SHIFT POSITION

	Shift Position
ECU Data List	P	R	N	D	B
P	ON	OFF	OFF	OFF	OFF
R	OFF	ON	OFF	OFF	OFF
N	OFF	OFF	ON	OFF	OFF
D	OFF	OFF	OFF	ON	OFF
B	OFF	OFF	OFF	OFF	ON
RV	OFF	ON	OFF	OFF	OFF
FD	OFF	OFF	OFF	ON	ON
MJ	ON	ON	ON	ON	ON

Check that no DTCs are output.
Result:

DTCs P0705-757, P0705-758, and P0851-775 are not output.

OK: CHECK FOR INTERMITTENT PROBLEMS

NG: GO TO NEXT STEP

INSPECT HYBRID VEHICLE CONTROL ECU

Turn the ignition switch to the ON position.

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

Fig 1: Inspecting Hybrid Vehicle Control ECU

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Voltage

HYBRID VEHICLE CONTROL ECU VOLTAGE

Shift Position	Tester Connection	Specified Condition
P	P (H31-12) - Body ground	10 to 14 V
Any position except P	P (H31-12) - Body ground	0 V
R	R (H31-11) - Body ground	10 to 14 V
Any position except R	R (H31-11) - Body ground	0 V
N	N (H31-10) - Body ground	10 to 14 V
Any position except N	N (H31-10) - Body ground	1 to 2.5 V
D	D (H31-9) - Body ground	10 to 14 V
Any position except D	D (H31-9) - Body ground	0 V
B	B (H31-8) - Body ground	10 to 14 V
Any position except B	B (H31-8) - Body ground	0 V
P, R, N, D, or B	MJ (H33-10) - Body ground	10 to 14 V
D or B	FD (H33-11) - Body ground	10 to 14 V
Any position except D and B	FD (H33-11) - Body ground	0 V
R	RV (H33-12) - Body ground	10 to 14 V
Any position except R	RV (H33-12) - Body ground	0 V

OK: REPLACE HYBRID VEHICLE CONTROL ECU

NG: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - BODY GROUND)

Disconnect the S35 park/neutral position switch connector.
Turn the ignition switch to the ON position.

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

Standard Voltage

PARK/NEUTRAL POSITION SWITCH - BODY GROUND VOLTAGE

Tester Connection	Specified Condition
+B (S35-6) - Body ground	10 to 14V

Fig 2: Checking Harness And Connector (Park/Neutral Position Switch - Body Ground)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NOTE: Turning the ignition switch to the ON position with the park/neutral position switch connector 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

CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - PARK/NEUTRAL POSITION SWITCH)

Disconnect the H31 and H33 connectors from the HV control ECU.
Disconnect the S35 park/neutral position switch connector.

Measure the voltage according to the value(s) in the table below when the ignition switch is in the ON position.

Standard Voltage

HV CONTROL ECU - PARK/NEUTRAL POSITION SWITCH VOLTAGE

Tester Connection	Specified Condition
P (H31-12) - Body ground	Below 1 V
R (H31-11) - Body ground	Below 1 V
N (H31-10) - Body ground	Below 1 V
D (H31-9) - Body ground	Below 1 V
B (H31-8) - Body ground	Below 1 V
MJ (H33-10) - Body ground	Below 1 V
FD (H33-11) - Body ground	Below 1 V
RV (H33-12) - Body ground	Below 1 V

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

Fig 3: Checking Harness And Connector (HV Control ECU - Park/Neutral Position Switch)

Turn the ignition switch off.

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

Standard Resistance (Check for open)

HV CONTROL ECU - PARK/NEUTRAL POSITION SWITCH (CHECK FOR OPEN)

Tester Connection	Specified Condition
P (H31-12) - P (S35-3)	Below 1 Ω
R (H31-11) - R (S35-4)	Below 1 Ω
N (H31-10) - N (S35-2)	Below 1 Ω
D (H31-9) - D (S35-1)	Below 1 Ω
B (H31-8) - B (S35-7)	Below 1 Ω
MJ (H33-10) - MJ (S35-5)	Below 1 Ω
FD (H33-11) - FD (S35-6)	Below 1 Ω
RV (H33-12) - RV (S35-9)	Below 1 Ω

Standard Resistance (Check for short)

HV CONTROL ECU - PARK/NEUTRAL POSITION SWITCH (CHECK FOR SHORT)

Tester Connection	Specified Condition
P (H31-12) or P (S35-3) - Body ground	10 kΩ or higher
R (H31-11) or R (S35-4) - Body ground	10 kΩ or higher
N (H31-10) or N (S35-2) - Body ground	10 kΩ or higher
D (H31-9) or D (S35-1) - Body ground	10 kΩ or higher
B (H31-8) or B (S35-7) - Body ground	10 kΩ or higher
MJ (H33-10) or MJ (S35-5) - Body ground	10 kΩ or higher
FD (H33-11) or FD (S35-6) - Body ground	10 kΩ or higher
RV (H33-12) or RV (S35-9) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE PARK/NEUTRAL POSITION SWITCH