Secondary Air Control Solenoid Valve System - Mitsubishi Electric Lancer Evolution-VII Workshop Manual

13A-96
Inspection Procedure 29

Secondary air control solenoid valve system

The secondary air control solenoid valve switches the pressure led into the
secondary air valve between the intake manifold and the atmospheric pressure.
MUT-II Actuator Test
D No. 36: Secondary air control
solenoid valve
OK: Operation sound is heard,
and there is vibration.
NG
Check the following connector:
B-142
OK
Measure at the B-142 secondary air
control solenoid valve connector.
D Disconnect the connector to
measure at the solenoid valve
side.
D Resistance between terminal No.
1 and terminal No. 2
OK: 29 - 35 Ω (at 20_C)
OK
Measure at the B-142 secondary air
control solenoid valve connector.
D Disconnect the connector to
measure at the harness side.
D Ignition switch: ON
D Voltage between terminal No. 1
and earth
OK: System voltage
OK
Measure at the C-118 engine-ECU
connector.
D Disconnect the connector to
measure at the haness side.
D Ignition switch: ON
D Voltage between terminal No. 53
and earth
OK: System voltage
OK
Check the following connector: C-118
NG
OK
Check the harness between the
secondary air control solenoid valve
and engine-ECU.
D Check for damage of the output
cable.
OK
NG
Check the harness between the
secondary air control solenoid valve
and engine control relay.
D Check for damage of the power
cable.
OK
MUT-II Actuator Test
D No. 36: Secondary air control
solenoid valve
OK: Operation sound is heard,
and there is vibration.
NG
Replace the engine-ECU.
MPI -
Troubleshooting
OK
Intermittent malfunction (Refer to
GROUP 00 - Points to Note for
Intermittent Malfunctions.)
NG
Repair
NG
Replace the secondary air control
solenoid valve.
NG
Check the following connectors:
B-14, B-11X
Check and repair the harness between
the secondary air control solenoid
valve and engine control relay.
D Check for disconnection and
short-circuit of the power cable.
NG
Check the following connectors:
B-14, B-11X
Check and repair the harness
between the secondary air control
solenoid valve and engine-ECU.
D Check for disconnection and
short-circuit of the output cable.
Repair
Repair
NG
Repair
OK
Intermittent malfunction (Refer to
GROUP 00 - Points to Note for
Intermittent Malfunctions.)
Probable cause
D Secondary air control solenoid valve malfunction
D Engine-ECU malfunction
NG
OK
OK
NG
OK
Repair
Repair