Toyota Tundra. Manual — part 1457

7. CHECK IGNITION SWITCH (POWER SOURCE)

a. Disconnect the J9 ignition switch connector.

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

Standard voltage

STANDARD VOLTAGE SPECIFICATION

Fig. 306: Identifying J9 Ignition Switch Connector

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 IGNITION SWITCH ).

OK : Go to Next Step

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

a. Disconnect the D35 PNP switch connector.

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

Standard voltage

Tester Connection

Condition Specified Condition

J9-5 (AM2) - Body ground Always

11 to 14 V

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

STANDARD VOLTAGE SPECIFICATION

Fig. 307: Identifying D35 PNP Switch Connector

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

OK : Go to Next Step

10. INSPECT PARK/NEUTRAL POSITION SWITCH

a. Inspect the Park/Neutral Position (PNP) switch.

1. Disconnect the D35 PNP switch connector.

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION

Result

RESULT REFERENCE

Tester Connection

Condition

Specified Condition

D35-4 - Body ground While cranking the engine

11 to 14 V

Tester Connection Switch Condition Specified Condition

4 - 5

Shift lever position P

Below 1 ohms

4 - 5

Shift lever position N

Below 1 ohms

Result

Proceed To

OK

A

NG (for 2WD)

B

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

Fig. 308: Identifying Park / Neutral Position Switch Connector

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

C : 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.

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION

NG (for 4WD)

C

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

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

Fig. 309: Identifying J9 Ignition Switch & A24 ECM Connectors

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.

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION

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

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra