Toyota Tundra. Manual — part 1646

Fig. 325: Starter - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. CHECK CRANKING

a. Check the cranking of the engine.

Result

RESULT CHART

B: Go to step 2

C: Go to step 11

A: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS
TABLE (See PROBLEM SYMPTOMS TABLE )

2. READ VALUE USING TECHSTREAM (STARTER SIGNAL)

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch to ON.

c. Turn the Techstream ON.

d. Enter the following menus: Powertrain/Engine and ECT/Data List/Starter Signal.

e. Read values.

f. Check the result when the ignition switch is turned to ON and when the engine is started.

Standard

STARTER SIGNAL REFERENCE

Test Result

Proceed to

Cranking possible and holding control operates

A

Does not crank

B

Cranking possible but holding control does not operate

C

Ignition Switch Position Display (Starter Signal)

2009 Toyota Tundra

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

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

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NG: Go to step 7

OK: Go to Next Step

3. INSPECT STARTER RELAY (ST)

a. Remove the starter relay (ST) from the engine room relay block (see STARTER RELAY ).

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

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

Fig. 326: Identifying Starter Relay (ST) Circuit With Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPLACE STARTER RELAY (ST) (See STARTER RELAY )

OK: Go to Next Step

4. CHECK HARNESS AND CONNECTOR (ST RELAY - PNP SWITCH)

a. Remove the starter relay (ST) from the engine room relay block (see STARTER RELAY ).

b. Disconnect the D35 PNP switch.

ON

OFF

START

ON

Tester Connection

Condition

Specified Condition

3 - 5

When no battery voltage applied to terminals 1 and 2 10 kohms or higher

3 - 5

When battery voltage applied to terminals 1 and 2

Below 1 ohms

2009 Toyota Tundra

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

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

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© 2006 Mitchell Repair Information Company, LLC.

Fig. 327: Identifying Starter Relay (ST) And D35 PNP Switch 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

5. CHECK STARTER RELAY (POWER SOURCE)

a. Remove the ST relay from the engine room relay block (see STARTER RELAY ).

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

Standard voltage

VOLTAGE SPECIFIED CONDITION

Tester Connection

Condition Specified Condition

ST relay (1) - D35-5

Always

Below 1 ohms

ST relay (1) or D35-5-Body ground Always

10 kohms or higher

Tester Connection

Condition Specified Condition

ST relay (2) - ST relay (5) Always

11 to 14 V

2009 Toyota Tundra

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

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

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© 2006 Mitchell Repair Information Company, LLC.

Fig. 328: Identifying Starter Relay Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (STARTER RELAY (ST)
BATTERY, BODY GROUND)

OK: Go to Next Step

6. INSPECT STARTER

a. Inspect the starter (see INSPECTION ).

NG: REPAIR OR REPLACE STARTER (See REMOVAL )

OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (STARTER - STARTER
RELAY (ST), BATTERY)

7. CHECK IGNITION SWITCH (POWER SOURCE)

a. Disconnect the J9 ignition switch connector.

Fig. 329: Identifying J9 Ignition Switch Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2009 Toyota Tundra

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

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

Page 680

© 2006 Mitchell Repair Information Company, LLC.