Toyota Tundra. Manual — part 1647

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

Standard voltage

VOLTAGE SPECIFIED CONDITION

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION SWITCH -
BATTERY POSITIVE TERMINAL)

OK: Go to Next Step

8. INSPECT IGNITION SWITCH

a. Inspect the ignition switch (see INSPECTION ).

NG: REPLACE IGNITION SWITCH (See REMOVAL )

OK: Go to Next Step

9. INSPECT PARK/NEUTRAL POSITION SWITCH (POWER SOURCE)

a. Disconnect the D35 PNP switch connector.

Fig. 330: Identifying D35 PNP Switch Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Standard voltage

VOLTAGE SPECIFIED CONDITION

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (PNP SWITCH - IGNITION

Tester Connection

Condition Specified Condition

J9-5 (AM2) - Body ground Always

11 to 14 V

Tester Connection

Condition

Specified Condition

D35-4 - Body ground While cranking the engine

11 to 14 V

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Saturday, June 19, 2010 7:34:49 PM

Page 681

© 2006 Mitchell Repair Information Company, LLC.

SWITCH)

OK: Go to Next Step

10. INSPECT PARK/NEUTRAL POSITION SWITCH

a. Disconnect the D35 PNP switch connector.

Fig. 331: Identifying D35 PNP Switch Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

Result

RESULT CHART

B: REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY (See REMOVAL )

A: REPAIR OR REPLACE HARNESS OR CONNECTOR (PNP SWITCH - ECM)

11. CHECK HARNESS AND CONNECTOR (IGNITION SWITCH - ECM)

a. Disconnect the J9 ignition switch connector.

b. Disconnect the A24 ECM connector.

Tester Connection Switch Condition Specified Condition

4 (B) - 5 (L)

Shift lever position P

Below 1 ohms

Shift lever position N

Below 1 ohms

Result Proceed to
OK

A

NG

B

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Saturday, June 19, 2010 7:34:49 PM

Page 682

© 2006 Mitchell Repair Information Company, LLC.

Fig. 332: Identifying J9 Ignition Switch And A24 ECM Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

12. CHECK HARNESS AND CONNECTOR (PNP SWITCH - ECM)

a. Disconnect the D35 PNP switch connector.

b. Disconnect the D74 ECM connector.

Fig. 333: Identifying D35 PNP Switch And D74 ECM Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Standard resistance

Tester Connection

Condition Specified Condition

J9-7 (ST2) - A24-14 (STSW)

Always

Below 1 ohms

J9-7 (ST2) or A24-14 (STSW) - Body ground Always

10 kohms or higher

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Saturday, June 19, 2010 7:34:49 PM

Page 683

© 2006 Mitchell Repair Information Company, LLC.

RESISTANCE SPECIFIED CONDITIONS

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE ECM (See REMOVAL )

ACIS CONTROL CIRCUIT

DESCRIPTION

This circuit opens and closes the Intake Air Control Valve (IACV) in response to the engine load in order to
increase the intake efficiency (ACIS: Acoustic Control Induction System).

Fig. 334: Intake Air Control Valve Operation Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

WIRING DIAGRAM

Fig. 335: ACIS - Wiring Diagram

Tester Connection

Condition Specified Condition

D35-4 - D74-16 (STAR)

Always

Below 1 ohms

D35-4 or D74-16 (STAR) - Body ground Always

10 kohms or higher

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Saturday, June 19, 2010 7:34:49 PM

Page 684

© 2006 Mitchell Repair Information Company, LLC.