Toyota Tundra. Manual — part 1370

Fig. 120: Identifying ED2 & D74 ECM Connectors

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

OK : Go To Next Step

3. INSPECT ECM (VOLTAGE)

a. Disconnect the ED2 connector.

b. Turn the ignition switch to ON.

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

Standard voltage

STANDARD VOLTAGE SPECIFICATION

Tester Connection

Switch Condition Specified Condition

ED2 male connector 10-9 Ignition switch ON

4.5 to 5.5 V

ED2 male connector 4-5 Ignition switch ON

4.5 to 5.5 V

2008 Toyota Tundra

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

Fig. 121: Identifying ED2 Connector

NG : REPLACE ECM (See REMOVAL )

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

4. INSPECT KNOCK SENSOR

a. Disconnect the ED2 connector.

b. 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

ED2 female connector 10-9 20°C (68°F) 120 to 280 kohms
ED2 female connector 4-5 20°C (68°F) 120 to 280 kohms

Result Proceed To

NG

A

OK

B

2008 Toyota Tundra

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

Fig. 122: Identifying ED2 Knock Sensor Connector Terminal

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

A : Go To Next Step

5. CHECK HARNESS AND CONNECTOR (CONNECTOR - KNOCK SENSOR)

a. Disconnect the ED2 connector.

b. Disconnect the E8 or E7 knock sensor connector.

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection

Condition Specified Condition

ED2 female connector 10 - E8-2

Always

Below 1 ohms

ED2 female connector 9 - E8-1

Always

Below 1 ohms

ED2 female connector 4 - E7-2

Always

Below 1 ohms

ED2 female connector 5 - E7-1

Always

Below 1 ohms

ED2 female connector 10 or E8-2-Body ground Always

10 kohms or higher

ED2 female connector 9 or E8-1 - Body ground Always

10 kohms or higher

ED2 female connector 4 or E7-2 - Body ground Always

10 kohms or higher

ED2 female connector 5 or E7-1 - Body ground Always

10 kohms or higher

2008 Toyota Tundra

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

Fig. 123: Identifying ED2, E8 Or E7 Knock Sensor Connectors

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

OK : REPLACE KNOCK SENSOR (See REMOVAL )

DTC P0335 CRANKSHAFT POSITION SENSOR "A" CIRCUIT; DTC P0339 CRANKSHAFT
POSITION SENSOR "A" CIRCUIT INTERMITTENT

DESCRIPTION

The Crankshaft Position (CKP) sensor system consists of a CKP sensor plate and a pickup coil.

The sensor plate has 34 teeth and is installed on the crankshaft. The pickup coil is made of wound copper wire,
an iron core and magnet. The sensor plate rotates and, as each tooth passes by the pickup coil, a pulse signal is
created. The pickup coil generates 34 signals per engine revolution. Based on these signals, the ECM calculates
the crankshaft position and engine RPM. Using these calculations, the fuel injection time and ignition timing are
controlled.

DTC DETECTION CONDITION AND TROUBLE AREA

DTC

Code

DTC Detection Condition

Trouble Area

2008 Toyota Tundra

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