Toyota Tundra. Manual — part 1557

Fig. 131: Identifying Terminals Of D74 ECM Connector
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 CONDITION

Result

RESULT REFERENCE

B: Go to step 3

A: Go to Next Step

Tester Connection

Condition Specified Condition

D74-94 (KNK1) - D74-93 (EKNK)

20°C (68°F) 120 to 280 kohms

D74-117 (KNK2) - D74-116 (EKN2) 20°C (68°F) 120 to 280 kohms
D74-96 (KNK3) - D74-95 (EKN3)

20°C (68°F) 120 to 280 kohms

D74-119 (KNK4) - D74-118 (EKN4) 20°C (68°F) 120 to 280 kohms

Result Proceed to

NG

A

OK

B

2009 Toyota Tundra

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

2. CHECK HARNESS AND CONNECTOR (ECM - KNOCK SENSOR)

a. Disconnect the D74 ECM connector.

Fig. 132: Identifying Terminals Of D74 ECM Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b. Disconnect the a3, a4, a5 or a6 knock sensor connector.

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

Standard resistance

RESISTANCE SPECIFIED CONDITION

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE KNOCK SENSOR (See REMOVAL )

3. INSPECT ECM

Tester Connection

Condition Specified Condition

a5-2 - D74-94 (KNK1)

Always

Below 1 ohms

a5-1 - D74-93 (EKNK)

Always

Below 1 ohms

a6-2 - D74-117 (KNK2)

Always

Below 1 ohms

a6-1 - D74-116 (EKN2)

Always

Below 1 ohms

a3-2 - D74-96 (KNK3)

Always

Below 1 ohms

a3-1 - D74-95 (EKN3)

Always

Below 1 ohms

a4-2 - D74-119 (KNK4)

Always

Below 1 ohms

a4-1 - D74-118 (EKN4)

Always

Below 1 ohms

a5-2 or D74-94 (KNK1) - Body ground

Always

10 kohms or higher

a5-1 or D74-93 (EKNK) -Body ground

Always

10 kohms or higher

a6-2 or D74-117 (KNK2) - Body ground Always

10 kohms or higher

a6-1 or D74-116 (EKN2) - Body ground Always

10 kohms or higher

a3-2 or D74-96 (KNK3) -Body ground

Always

10 kohms or higher

a3-1 or D74-95 (EKN3) - Body ground

Always

10 kohms or higher

a4-2 or D74-119 (KNK4) - Body ground Always

10 kohms or higher

a4-1 or D74-118 (EKN4) - Body ground Always

10 kohms or higher

2009 Toyota Tundra

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

a. Disconnect the a3, a4, a5 or a6 knock sensor connector.

b. Turn the ignition switch to ON.

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

Standard voltage

VOLTAGE SPECIFIED CONDITION

Fig. 133: Identifying Terminals Of Knock Sensor Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPLACE ECM (See REMOVAL )

OK: CHECK FOR INTERMITTENT PROBLEMS (See CHECK FOR INTERMITTENT
PROBLEMS )

DTC P0335 CRANKSHAFT POSITION SENSOR "A" CIRCUIT; DTC P0337 CRANKSHAFT
POSITION SENSOR "A" CIRCUIT LOW INPUT; DTC P0338 CRANKSHAFT POSITION SENSOR
"A" CIRCUIT HIGH INPUT; DTC P0339 CRANKSHAFT POSITION SENSOR "A" CIRCUIT
INTERMITTENT

DESCRIPTION

The crankshaft position (CKP) sensor system consists of a crankshaft position sensor plate and Magnetic
Resistance Element (MRE) type sensor. The crankshaft position sensor plate has 34 teeth at 10° intervals (2
teeth are missing for detecting top dead center), and is installed to the rear end of the crankshaft. The crankshaft
position sensor outputs 34 rotation signals per engine revolution. The ECM uses the G2 signal to distinguish
between the cylinders, and uses the NE signal to detect the crankshaft position and engine speed.

Tester Connection Switch Condition Specified Condition

1 - 2

Ignition switch ON

4.5 to 5.5 V

2009 Toyota Tundra

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

DTC DETECTION CONDITION AND TROUBLE AREA REFERENCE CHART

Reference: Inspection using an oscilloscope.

Fig. 134: Identifying NE And G2 Signal Waveform
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

DTC

DTC Detection Condition

Trouble Area

P0335



No CKP sensor signal to
ECM while cranking (1 trip
detection logic)



No CKP sensor signal to
ECM at engine speed of less
than 450 RPM (1 trip
detection logic)



Open or short in CKP sensor
circuit



CKP sensor



CKP sensor plate



ECM

P0337

Output voltage of CKP sensor 0.3
V or less for 4 seconds (1 trip
detection logic)



Open or short in CKP sensor
circuit



CKP sensor



CKP sensor plate



ECM

P0338

Output voltage of CKP sensor 4.7
V or more for 4 seconds (1 trip
detection logic)



Open or short in CKP sensor
circuit



CKP sensor



CKP sensor plate



ECM

P0339

Under conditions (a), (b) and (c),
no CKP sensor signal to ECM for
0.05 seconds or more (1 trip
detection logic):

a. Engine speed 1000 RPM or

more

b. Starter signal OFF

c. 3 seconds or more have

elapsed since starter signal
switched from ON to OFF



Open or short in CKP sensor
circuit



CKP sensor



CKP sensor plate



ECM

2009 Toyota Tundra

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