Inspection Procedure

HINT:

• Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

• The throttle actuator current (THROTTLE MOT) and the throttle actuator duty ratio (THROTL OPN DUTY / THROTL CLS DUTY) can be read using the intelligent tester. However, the ECM shuts off the throttle actuator current when the ETCS malfunctions.

INSPECT THROTTLE BODY (RESISTANCE OF THROTTLE ACTUATOR)

Component Side:

Throttle Body

Jli-ifl

Co

5

4

3

2

i>

M+

M-

ÈI

A059778E21

(a) Disconnect the B3 throttle body connector.

(b) Measure the resistance of the throttle actuator. Standard resistance

Tester Connections

Specified Conditions

2 (M+) - 1 (M-)

0.3 to 100 n at 20°C (68°F)

(c) Reconnect the throttle body connector.

REPLACE THROTTLE BODY ASSEMBLY

CHECK HARNESS AND CONNECTOR (THROTTLE ACTUATOR - ECM)

Wire Harness Side:

(^B^ Throttle Body Connector M+

(^B^ Throttle Body Connector M+

Front View

(530) ECM Connector

if

M

/

M

1 II

V-

Front View M+

A115662E04

(a) Disconnect the B3 throttle body connector.

(b) Disconnect the B30 ECM connector.

(c) Measure the resistance.

Standard resistance (Check for open)

Tester Connections

Specified Conditions

B3-2 (M+) - B30-42 (M+)

Below 1 Q

B3-1 (M-) - B30-41 (M-)

Below 1 Q

Standard resistance (Check for short)

Tester Connections

Specified Conditions

B3-2 (M+) or B30-42 (M+) - Body ground

10 kQ or higher

B3-1 (M-) or B30-41 (M-) - Body ground

10 kQ or higher

(d) Reconnect the throttle body connector.

(e) Reconnect the ECM connector.

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REPAIR OR REPLACE HARNESS OR CONNECTOR

INSPECT THROTTLE BODY ASSEMBLY

(a) Check for foreign objects between the throttle valve and the housing. OK:

No foreign objects between throttle valve and housing.

REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY

INSPECT THROTTLE VALVE

(a) Check if the throttle valve opens and closes smoothly.

Throttle valve opens and closes smoothly.

REPLACE THROTTLE BODY ASSEMBLY

REPLACE ECM

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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