Inspection Procedure Template

DTC 47 Sub-Throttle Position Sensor Circuit





WIRING DIAGRAM


INSPECTION PROCEDURE

HINT:
- If diagnostic trouble code 41 is displayed, check throttle position sensor circuit,
- If diagnostic trouble code 47 is displayed, check sub-throttle position sensor circuit.
- If diagnostic trouble code 22 (engine coolant temperature sensor circuit), 24 (intake air temperature sensor circuit) and 41 (throttle position sensor circuit) are output simultaneously, E2 (sensor ground) may be open.

1. CHECK VOLTAGE BETWEEN TERMINALS VTA1, VTA2, IDL1, IDL2 AND E2 OF ECM CONNECTOR.
(a) Connect the Check Harness A.
(b) Turn ignition switch ON.
(c) For throttle position sensor, disconnect the vacuum hose from the throttle body, then apply vacuum to the throttle opener.
For sub-throttle position sensor, remove intake air duct and disconnect sub-throttle valve step motor connector.



(d) Measure voltage between terminals VTA1, VTA2, IDL1, IDL2 and E2 of engine control module connector when the (sub-) throttle valve is opened gradually from the closed condition.
HINT: The voltage should increase steadily in proportion to the throttle valve opening angle.



- If OK check for momentary (intermittent) interruption.
- If not OK proceed to step 2.

2. CHECK THROTTLE POSITION SENSOR(S).
(a) Remove throttle body.
(b) For throttle position sensor, apply vacuum to throttle opener.

Throttle Position Sensor Connector View:

Sub-Throttle Position Sensor Connector View:

(c) Measure resistance of each terminal as below table when the throttle valve is opened gradually from the closed condition.
HINT: Resistance between terminals 2, 3 (VTA1, 2) and 4, 1 (E2) should increase gradually in accordance with the throttle valve opening angle.



- If OK proceed to step 3.
- If not OK adjust or replace throttle position sensor.

3. CHECK FOR OPEN AND SHORT IN HARNESS AND CONNECTOR BETWEEN ECM AND THROTTLE POSITION SENSOR(S).
^. If OK check and replace ECM.
- If not OK repair or replace harness or connector