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DI-640-DIAGNOSTICS AUTOMATIC TRANSMISSION (A340E, A340F)

904 Author: Date:

2004 TOYOTA TACOMA (RM1090U)

DTC P0705 Transmission Range Sensor Circuit Mal-function (PRNDL Input)

DTC P0850 Park/Neutral Switch Input Circuit

CIRCUIT DESCRIPTIONThe park/neutral position switch detects the shift lever position and sends signals to the ECM.

DTC No. DTC Detection Condition Trouble Area

P07052 or more switches are ON simultaneously at R, N, D, 2 and L

positions (2-trip detection logic)

P0850

Park/neutral position switch remains ON while driving under

conditions (a) and (b) for 30 sec. (2-trip detection logic)

(a) Vehicle speed: 70 km/h (43 mph) or more

(b) Engine speed: 1,500 - 2,500 rpm

SShort in park/neutral position switch circuit

SPark/neutral position switchSECM

MONITOR DESCRIPTIONThe park/neutral position switch detects the shift lever position and sends a signal to the ECM.

For security, the park/neutral position switch detects the shift lever position so that engine can be started

only when the vehicle is in P or N shift position.

When the park/neutral position switch sends more than one signal at a time from switch positions P, R, N

or D, the ECM interprets this as a fault in the switch. The ECM will turn on the MIL and store the DTC.

MONITOR STRATEGYP0705:

Related DTCs P0705 Park/neutral position switch/Verify switch input

Required sensors/Components Park/neutral position switch

Frequency of operation Continuous

Duration 0.5 sec.

MIL operation 2 driving cycles

Sequence of operation None

P0850:

Related DTCs P0850 Park/neutral position switch/Verify switch cycling

Required sensors/Components Park/neutral position switch

Frequency of operation Continuous

Duration 30 sec.

MIL operation 2 driving cycles

Sequence of operation None

DIB1E-02

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-DIAGNOSTICS AUTOMATIC TRANSMISSION (A340E, A340F)

DI-641

905 Author: Date:


TYPICAL ENABLING CONDITIONSP0705:

SpecificationItem

Minimum Maximum

The monitor will run whenever the follow-ing DTCs are not present.

See page DI-627

The typical enabling condition is not avail-

able.-

P0850:

SpecificationItem

Minimum Maximum

The monitor will run whenever the follow-

ing DTCs are not present.See page DI-627

Vehicle speed 70 km/h (43 mph) or more -

Engine speed 1,500 rpm or more 2,500 rpm or less

Intake air amount per revolution 0.6 g/rev. or more -

TYPICAL MALFUNCTION THRESHOLDSP0705:

Engine family Detection criteria Threshold

Number of the following signal input at the same

time2 or more

NSW switch3RZ-FE

R switch

D switchON

2 switch

Number of the following signal input at the same

time2 or more

NSW switch

5VZ-FE R switch

D switch ON

2 switch

L switch

P0850:

Detection criteria Threshold

NSW signal ON

COMPONENT OPERATING RANGEP0705:

Parameter Standard value

Park/neutral position switch The park/neutral position switch sends only one signal to the ECM

P0850:

Parameter Standard value

Park/neutral position switch The park/neutral position switch is OFF in above condition
http://../04rmsour/2004/04tacoma/di/ata340ea/dtcc.pdfhttp://../04rmsour/2004/04tacoma/di/ata340ea/dtcc.pdfhttp://../04rmsour/2004/04tacoma/di/ata340ea/dtcc.pdfhttp://../04rmsour/2004/04tacoma/di/ata340ea/dtcc.pdf

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D11915D13645

R/BNo. 2

B

W

2

2

AM1

ALT

1

1

2

2

W

W

Battery

I14IgnitionSwitch

1 4

B-Y2

J/B No. 1

GAUGE

1I 1F

B-R

R-BE5

5

19 3D

18

16 IK2

B-R

P1

3D 4 3B

J/BNo. 3

B-R R-B

3

P1

P1

P1

P1P1

2

4

8

9

R-B

IK2

IK2

E5

E5

IK3 IK3

P

R3

4

R

L

B-YG

2

2

54

P

8

IK3

621

Park/NeutralPosition Switch

5 3E

6 3E21

IF11

2

5

2

2

2

32

STARTER Relay W-B

J10E

J/CD

EA

ToSTARTER

J9

W-B

B3

1I

6

1F

STA

3E

3E

3E E5

2222

21

20

J/B No. 3

ECM

B+

NSW

2

J/B No. 3

2

3RZ-FE:

R

Y-GR

J/BNo. 3

3B2

R/B No. 2

J/B No. 1

2

R

L

W

ST1 IG1

AM1

G

GG

Y-GR

Y-GR


906 Author: Date:


WIRING DIAGRAM

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D13177D13646

R/BNo. 2

B

W

2

2

AM1

ALT

1

1

2

2

W

W

Battery

I14IgnitionSwitch

1 4

B-Y2

J/B No. 1

GAUGE

1I 1F

B-R

R-BE6

5

19 3D

18

16 IK2

B-R

P1

3D 4 3B

J/BNo. 3

B-R R-B

3

P1

P1

P1

P1P1

2

4

8

9

R-B

IK2

IK2

E6

E6

IK3 IK3

P

R4

5

R

L

B-YG

6

2

54

P

8

IK3

621

Park/NeutralPosition Switch

5 3E

6 3E

21

IF11

2

52

22

32

STARTER RelayW-B

J10

E J/C D

EA

ToSTARTER

J9

W-B

B3

1I

6

1F

STA

3E

3E

3E E6

32221

20

J/B No. 3

ECM

B+

NSW

2

J/B No. 3

2

5VZ-FE:

R

Y-GR

J/BNo. 3

3B2

R/B No. 2

J/B No. 1

ST1 IG1

AM1

R

L

2

W

G

GG

Y-GRY-GR


DI-643

907 Author: Date:


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D12208

3RZ-FE:

2 L R

(-) (+) NSW

5VZ-FE:

2 LR(-) (+) NSW

Position

P,N

R

D

2

L

NSW-Bodyground

R-Bodyground

2-Bodyground

L-Bodyground

0 V0 V 0 V 0 V

0 V

0 V

0 V

0 V

0 V

0 V

0 V

0 V

0 V

7.5 - 14 V*

7.5 - 14 V

7.5 - 14 V

7.5 - 14 V

7.5 - 14 V

7.5 - 14 V

7.5 - 14 V*


908 Author: Date:


INSPECTION PROCEDURE

1 Read PNP, REVERSE, DRIVE, 2ND and LOW signals.

When using hand-held tester

PREPARATION:

(a) Remove the DLC3 cover.

(b) Connect a hand-held tester to the DLC3.

(c) Turn the ignition switch ON and hand-held tester main

switch ON.

CHECK:

Shift lever into the P, R, N, 2 and L positions, and read the PNP,

REVERSE, 2ND and LOW signals on the hand-held tester.

OK:

Shift position Signal

2 2ND OFF ON

L LOW OFF ON

R REVERSE OFF ON

P, N PNP OFF ON

When not using hand-held tester

PREPARATION:

Turn the ignition switch ON.

CHECK:

Measure voltage between terminals NSW, 2, L and R of ECM

and body ground when the shift lever is shifted to the following

positions.

OK:

HINT:

*: The voltage will drop slightly due to lighting up of the back up

light.

OK Check and replace the ECM(See page IN-28 ).

NG
http://../04rmsour/2004/04tacoma/in/httecsy/htutdc.pdfhttp://../04rmsour/2004/04tacoma/in/httecsy/htutdc.pdf

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D06561

1

678

2345

9


DI-645

909 Author: Date:


2 Check park/neutral position switch.

PREPARATION:

Remove the park/neutral position switch.

CHECK:Check the continuity between the switch terminals when oper-

ating the switch lever, as shown in the table below.

OK:

Switch Position Terminal No. Specified Condition

R Contuinuity

Except R2 - 3

No contuinuity

2 Contuinuity

Except 24 - 3

No contuinuity

L Contuinuity

Except L8 - 3

No contuinuity

P and N Contuinuity

Except P and N9 - 6

No contuinuity

NG Replace park/neutral position switch(See page AT-9 ).

OK

3 Check harness and connector between ECM and park/neutral position switch.

NG Repair or replace harness and connector.

OK

Check and replace the ECM(See page IN-28 ).
http://../04rmsour/2004/04tacoma/ata340ea/pnpsw/ovr.pdfhttp://../04rmsour/2004/04tacoma/in/httecsy/htutdc.pdfhttp://../04rmsour/2004/04tacoma/in/httecsy/htutdc.pdfhttp://../04rmsour/2004/04tacoma/ata340ea/pnpsw/ovr.pdf

2008-03-28_234013_04tacop0705

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