## Intake Air System

#### DTC Troubleshooting

11-167

DTC P1112: Variable Swirl Control Valve (VSCV) Circuit Open

1. Check the ''On Board Diagnostic (OBD) System Check''.

Was the OBD System Check performed?

YES – Go to step 2.

NO – Go to OBD System Check.

1. Turn the ignition switch OFF.

1. Disconnect the VSCV connector.

1. Turn the ignition switch ON (II).

1. Measure voltage between the VSCV 2P connector terminals No. 1 and body ground.

Wire side of female terminals

Is there battery voltage?

YES – Go to step 6.

NO – Repair open in the wire between the VSCV and the main relay.

1. Turn the ignition switch OFF.

1. Disconnect the ECM A connector.

1. Connect the VSCV connector terminals No. 1 and No. 2 with a jumper wire.

1. Turn the ignition switch ON (II).

1. Measure voltage between the ECM A connector terminals No. 18 and body ground.

Is there battery voltage?

YES – Go to step 11.

NO – Repair open in the wire between the VSCV and the ECM connector terminal No. 7.

1. Turn the ignition switch OFF.

1. Connect the VSCV connector.

1. Connect the DVM the ECM connector terminals No. 18 and body ground.

1. Turn the ignition switch ON (II).

Is there B+?

YES – Go to inspection.

NO – Substitute a known-good ECM and recheck. If symptom/indication goes away, replace the original ECM.

NOTICE

The battery power supply short circuit to 5 V power supply damages the ECM.

a a a