Idle Speed/Throttle Actuator - Electronic: Testing and Inspection

DTC 24 By-Pass Air Control Solenoid Valve Diagnostic Chart:

DTC 24 By-Pass Air Control Solenoid Valve Circuit:

DIAGNOSTIC CHART AND DIAGRAM

1. CHECK POWER SUPPLY VOLTAGE FOR ECM.
1) Turn ignition switch to "ON".
2) Measure voltage between ECM connector and body.

Connector & Terminal/Specified value
(B62) No. 14 - Body/10 V, min.

2. CHECK HARNESS CONNECTOR BETWEEN ECM AND MAIN RELAY.
1) Turn ignition switch to "OFF".
2) Disconnect connector from ECM and main relay.
3) Measure resistance of harness connector between ECM and main relay.

Connector & Terminal/Specified value
(B62) No. 14 - (B52) No. 4/0 ohms

3. CHECK POWER SUPPLY CIRCUIT OF MAIN RELAY.
1) Turn ignition switch to "ON".
2) Measure voltage between main relay connector and body.

Connector & Terminal/Specified value
(B52) No. 1 - Body/10 V, min.
(B52) No. 2- Body/10 V, min.

4. CHECK INPUT SIGNAL FROM BY-PASS AIR CONTROL SOLENOID VALVE.
1) Turn ignition switch to "ON".
2) Measure voltage between ECM connector and body.

Connector & Terminal/Specified value
(B62) No. 2 - Body/7 V, min.
(B62) No. 1 - Body/6 V, min.

By-Pass Air Control Solenoid Valve and ECM Connectors:

5. CHECK HARNESS CONNECTOR BETWEEN ECM AND SOLENOID VALVE.
1) Turn ignition switch to "OFF".
2) Disconnect ECM connectors.
3) Separate throttle body from collector, and disconnect connector from by-pass air control solenoid valve.
4) Measure resistance of harness connector between ECM and solenoid valve.

Connector & Terminal/Specified value
(B62) No. 2 - (E15) No. 3/0 ohm
(B62) No. 1 - (El 5) No. 1/0 ohm