Toyota Tundra. Manual — part 1634

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

Result

VOLTAGE SPECIFIED CONDITION

B: Go to step 24

C: Go to step 34

A: Go to Next Step

23. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - BODY GROUND)

a. Turn the ignition switch off.

b. Disconnect the R1 canister pump module connector.

Tester

Connection

Condition

Specified

Condition

Suspected Trouble Area

Proceed

to

R1-1 (MTRB) -
Body ground

Leak detection pump is
turned ON and OFF
using the Techstream

Below 3 V when
OFF 9 to 14 V
when ON

1. Wire harness

between leak
detection pump and
body ground

2. Leak detection pump

A

Leak detection pump is
turned ON and OFF
using the Techstream

Below 3 V when
OFF and ON

1. Wire harness

between leak
detection pump and
ECM

2. ECM

B

Leak detection pump is
turned ON and OFF
using the Techstream

9 to 14 V when
OFF and ON

ECM

C

2009 Toyota Tundra

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

Saturday, June 19, 2010 7:34:48 PM

Page 629

© 2006 Mitchell Repair Information Company, LLC.

Fig. 286: Identifying R1 Canister Pump Module Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Result

2009 Toyota Tundra

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

Saturday, June 19, 2010 7:34:48 PM

Page 630

© 2006 Mitchell Repair Information Company, LLC.

RESISTANCE SPECIFIED CONDITION

A: Go to step 29

B: Go to step 31

24. CHECK HARNESS AND CONNECTOR (ECM - CANISTER PUMP MODULE)

a. Turn the ignition switch off.

b. Disconnect the R1 canister pump module connector.

c. Disconnect the A24 ECM connector.

Tester Connection Condition

Specified

Condition

Suspected Trouble Area

Proceed

to

R1-6 (MGND) -
Body ground

Always

Below 1 ohms

Leak detection pump

A

Always

10 kohms or
higher

Wire harness between canister pump
module and body ground

B

2009 Toyota Tundra

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

Saturday, June 19, 2010 7:34:48 PM

Page 631

© 2006 Mitchell Repair Information Company, LLC.

Fig. 287: Identifying R1 Canister Pump Module And A24 ECM Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

2009 Toyota Tundra

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

Saturday, June 19, 2010 7:34:48 PM

Page 632

© 2006 Mitchell Repair Information Company, LLC.