Page 761 of 3000
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–475
ES
(a) Remove the ST relay from the No. 3 relay block.
(b) Disconnect the S4 starter connector.
(c) Measure the resistance according to the value(s) in the
table below.
Standard resistance (check for open)
Standard resistance (check for short)
(d) Reconnect the starter connector.
(e) Reinstall the ST relay to the No. 3 relay block.
NG
OK
12CHECK HARNESS AND CONNECTOR (ST RELAY - STARTER ASSEMBLY)
A166713E01
Tester Connection Specified Condition
ST relay terminal (3) - S4-1 Below 1
Tester Connection Specified Condition
ST relay terminal (3) or S4-1 - Body
ground10 k
or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR (ST RELAY - STARTER
ASSEMBLY)
REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - STARTER ASSEMBLY)
Page 762 of 3000
ES–4762GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(a) Remove the ST fuse from the fuse box.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
(c) Reinstall the ST fuse.
NG
OK
(a) Disconnect the I15 ignition switch connector.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
(c) Reconnect the ignition switch connector.
NG
OK
13INSPECT FUSE (ST FUSE)
A166723E01
Tester Connection Specified Condition
1 - 2 Below 1
REPLACE FUSE (ST FUSE)
14INSPECT IGNITION SWITCH ASSEMBLY
B050489E19
Switch Condition Tester Connection Specified Condition
LOCK All terminals 10 k
or higher
ACC 1 - 3 Below 1
ON 1 - 2, 1 - 3, 2 - 3, 5 - 6 Below 1
START 4 - 5, 4 - 6, 5 - 6, 1 - 2 Below 1
REPLACE IGNITION SWITCH ASSEMBLY
Page 763 of 3000
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–477
ES
(a) Disconnect the E11 ECM connector.
(b) Disconnect the I15 ignition switch connector.
(c) Measure the resistance according to the value(s) in the
table below.
Standard resistance (check for open)
Standard resistance (check for short)
(d) Reconnect the ECM connector.
(e) Reconnect the ignition switch connector.
NG
OK
15CHECK HARNESS AND CONNECTOR (ECM - IGNITION SWITCH ASSEMBLY)
A166724E01
Tester Connection Specified Condition
STSW (E11-12) - ST2 (I15-4) Below 1
Tester Connection Specified Condition
STSW (E11-12) or ST2 (I15-4) - Body
ground10 k
or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR (ECM - IGNITION SWITCH
ASSEMBLY)
REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION SWITCH - BATTERY)
Page 764 of 3000
ES–4782GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
DESCRIPTION
This circuit opens and closes the Intake Air Control Valve (IACV) in response to changes in the engine
load in order to increase the intake efficiency (ACIS: Acoustic Control Induction System).
When the engine speed is between 0 and 4450 rpm and the throttle valve opening angle is 60
or more,
the ECM supplies current to the VSV (ON status), to close the IACV. Under other conditions, the VSV is
usually OFF and the IACV is open.
ACIS Control Circuit
G041080E10
Page 765 of 3000
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–479
ES
WIRING DIAGRAM
INSPECTION PROCEDURE
(a) Connect the intelligent tester to the DLC3.
(b) Start the engine and turn the intelligent tester on.
(c) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / ACTIVE TEST / INTAKE CTL
VSV1. Operate the VSV for AICS.
OK:
Operational noise can be heard.
OK
NG
(a) Disconnect the V14 VSV for ACIS connector.
(b) Apply battery voltage between the terminals of the air
intake valve connector.
(c) Check the air intake valve operation.
OK:
Operational noise can be heard.
(d) Reconnect the VSV for ACIS connector.
NG
1PERFORM ACTIVE TEST BY INTELLIGENT TESTER (OPERATE VSV FOR ACIS)
A136867E19
PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE
2CHECK INTAKE AIR CONTROL VALVE (OPERATION)
E121181E09
REPLACE INTAKE AIR SURGE TANK
Page 766 of 3000

ES–4802GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
OK
(a) Check the wire harness and connectors between the
VSV for ACIS and ECM.
(1) Disconnect the V14 VSV for ACIS connector.
(2) Disconnect the E9 ECM connector.
(3) Measure the resistance according to the value(s) in
the table below.
Standard resistance :
Check for open
Check for short
(4) Reconnect the VSV for ACIS connector.
(5) Reconnect the ECM connector.
NG
OK
(a) Check the EFI No. 2 fuse.
(1) Remove the EFI No. 2 fuse from the engine room
junction block.
(2) Measure the EFI No. 2 fuse resistance.
Standard resistance:
Below 1
(3) Reinstall the EFI No. 2 fuse.
NG
OK
3CHECK HARNESS AND CONNECTOR (VSV FOR ACIS - ECM)
A163544E03
Tester Connection Specified Condition
VSV for ACIS (V14-1) - ACIS (E9-33) Below 1
Tester Connection Specified Condition
VSV for ACIS (V14-1) or ACIS (E9-33) - E1 (E11-1) 10 k
or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR (VSV FOR ACIS - ECM)
4INSPECT FUSE (EFI NO. 2 FUSE)
A080011E12
REPLACE FUSE (EFI NO. 2 FUSE)
Page 767 of 3000
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–481
ES
(a) Check the wire harness between the VSV for ACIS
connector and EFI relay.
(1) Remove the EFI relay from the engine room junction
block.
(2) Disconnect the V14 VSV connector.
(3) Measure the resistance according to the value(s) in
the table below.
Standard resistance :
Check for open
(4) Reinstall the EFI relay.
(5) Reconnect the VSV connector.
NG
OK
5CHECK HARNESS AND CONNECTOR (VSV FOR ACIS - EFI RELAY)
A163545E04
Tester Connection Specified Condition
VSV for ACIS (V14-2) - EFI relay terminal (3) Below 1
REPAIR OR REPLACE HARNESS OR
CONNECTOR (VSV FOR ACIS - EFI RELAY)
CHECK ECM POWER SOURCE CIRCUIT (See page ES-437)
Page 768 of 3000

ES–4862GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
DESCRIPTION
The MIL (Malfunction Indicator Lamp) is used to indicate vehicle malfunctions detected by the ECM.
When the ignition switch is turned to the ON position, power is supplied to the MIL circuit, and the ECM
provides the circuit ground which illuminates the MIL.
The MIL operation can be checked visually. When the ignition switch is first turned to the ON position, the
MIL should be illuminated and should then turn off. If the MIL remains illuminated or is not illuminated,
conduct the following troubleshooting procedure using the intelligent tester.
WIRING DIAGRAM
INSPECTION PROCEDURE
(a) Turn the ignition switch to the ON position.
(b) Check the illumination of the MIL.
Result
MIL Circuit
1CHECK THAT MIL IS ILLUMINATED
A136868E04
Result Proceed to
MIL remains illuminated (Even after ignition switch is turned to ON position and several
seconds have passed, MIL still remains illuminated)A
MIL remains off (Does not illuminate at all)B
MIL illuminates for several seconds, but turns off after engine is started C