Toyota Tundra. Manual — part 931

Fig. 51: Identifying P15 And P16 Sensor Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

for 4WD

TESTER CONNECTION SPECIFIED CONDITION TABLE

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

Standard Resistance: for 2WD

TESTER CONNECTION SPECIFIED CONDITION TABLE

for 4WD

TESTER CONNECTION SPECIFIED CONDITION TABLE

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE VSC ACTUATOR ASSEMBLY (See REMOVAL )

Tester Connection

Switch Condition

Specified Condition

P15-3 (VYS) - P15-5 (GYAW)

Ignition switch ON

11 to 14 V

Tester Connection

Switch Condition

Specified Condition

P16-3 (VYS) - P16-5 (GYAW)

Ignition switch ON

11 to 14 V

Tester Connection

Switch Condition

Specified Condition

P15-5 (GYAW) - Body ground

Ignition switch ON

Below 1 ohms

Tester Connection

Switch Condition

Specified Condition

P16-5 (GYAW) - Body ground

Ignition switch ON

Below 1 ohms

2009 Toyota Tundra

2009 BRAKES Brake Control - Tundra

DTC C1201/51: ENGINE CONTROL SYSTEM MALFUNCTION

DESCRIPTION

If a malfunction in the engine control system is detected through the CAN, the operations of VSC and TRAC
are prohibited by the fail-safe function. When the signals from the engine are input normally, the fail-safe is
canceled and the DTC is stored.

DTC DETECTION CONDITION TABLE

INSPECTION PROCEDURE

1. CHECK DTC (FOR SFI SYSTEM)

a. for 1GR-FE:

Clear the DTC (SFI system) (See DTC CHECK/CLEAR ).

Clear the DTC (SFI system) (See DTC CHECK/CLEAR ).

Clear the DTC (SFI system) (See DTC CHECK/CLEAR ).

b. for 1GR-FE:

Check the DTC (SFI system) (See DTC CHECK/CLEAR ).

Check the DTC (SFI system) (See DTC CHECK/CLEAR ).

Check the DTC (SFI system) (See DTC CHECK/CLEAR ).

Result

RESULT TABLE

B: GO TO SFI SYSTEM (See DIAGNOSTIC TROUBLE CODE TABLE )

DTC Code

DTC Detection Condition

Trouble Area

C1201/51

Engine control system malfunction
signal continues for 1.2 seconds.

SFI system

NOTE:

When replacing the VSC actuator assembly, perform zero point calibration (See
CALIBRATION ).

Result

Proceed to

DTC (SFI system) is not output

A

DTC (SFI system) is output (for 1GR-FE)

B

DTC (SFI system) is output (for 2UZ-FE)

C

DTC (SFI system) is output (for 3UR-FE)

D

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C: GO TO SFI SYSTEM (See DIAGNOSTIC TROUBLE CODE TABLE )

D: GO TO SFI SYSTEM (See DIAGNOSTIC TROUBLE CODE TABLE )

A: USE SIMULATION METHOD TO CHECK (See HOW TO PROCEED WITH
TROUBLESHOOTING )

DTC C1203/53: ECM COMMUNICATION CIRCUIT MALFUNCTION

DESCRIPTION

A new skid control ECU is supplied without engine variation data. Until it is recognized by the ECU, DTC
C1203/53 remains stored. By entering test mode, recognition of engine variation data is automatically
conducted, and DTC C1203/53 is erased automatically.

DTC DETECTION CONDITION TABLE

INSPECTION PROCEDURE

1. PERFORM TEST MODE INSPECTION

a. Perform TEST MODE PROCEDURE .

2. RECONFIRM DTC

a. Clear the DTC (See DTC CHECK/CLEAR ).

b. Start the engine.

c. Check if the same DTC is output (See DTC CHECK/CLEAR ).

Result

RESULT TABLE

DTC Code

DTC Detection Condition

Trouble Area

C1203/53

When all of following conditions
detected:

1. Engine variation data from

ECM does not match one in
skid control ECU non-
volatile memory.

2. DTC U0073/94 not detected.

3. DTC U0100/65 not detected.



Test mode not performed



Skid control ECU

NOTE:

When replacing the VSC actuator assembly, perform zero point calibration (See
CALIBRATION ).

Result

Proceed to

DTC is output

A

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2009 BRAKES Brake Control - Tundra

B: USE SIMULATION METHOD TO CHECK (See HOW TO PROCEED WITH
TROUBLESHOOTING )

A: REPLACE VSC ACTUATOR ASSEMBLY (See REMOVAL )

DTC C1207/37: MALFUNCTION IN PARK/NEUTRAL POSITION SWITCH

DESCRIPTION

The park/neutral position switch signal is sent to the skid control ECU via the CAN communication system.

When there is a malfunction in the CAN communication system, it will be detected by the diagnostic function.

DTC DETECTION CONDITION TABLE

WIRING DIAGRAM

DTC is not output

B

DTC Code

DTC Detection Condition

Trouble Area

C1207/37

When all conditions below are
met:



Yaw rate sensor is normal.



G sensor lateral operation is
normal.



Vehicle speed is 40 km/h
(24.9 mph) or more.



Reversing signal is output
from ECM for 1 second or
more.



Park/Neutral position switch



ECM



CAN communication system



Harness or connector



Skid control ECU

2009 Toyota Tundra

2009 BRAKES Brake Control - Tundra