Page 825 of 2898
3 CHECK THROTTLE OPENER FIXING BOLTS
Check throttle opener fixing bolts for loosening.
OK or NG
OK©1. Repair or replace throttle body assembly.
2. GO TO 2.
NG©1. Retighten the fixing bolts.
2. GO TO 2.
4 CHECK THROTTLE OPENER OPERATION-II
1. Start engine and let it idle.
2. Confirm that throttle opener rod moves backward and there is a clearance between throttle drum and throttle opener
rod.
SEF850Y
OK or NG
OK©GO TO 7.
NG©GO TO 5.
5 CHECK VACUUM SOURCE FOR THROTTLE OPENER
1. Disconnect vacuum hose connected to throttle opener.
2. Check vacuum existance with engine running.
SEF155Y
OK or NG
OK©1. Repair or replace throttle body assembly.
2. GO TO 2.
NG©GO TO 6.
TROUBLE DIAGNOSIS Ð BASIC INSPECTIONQG
Basic Inspection/Sedan (Cont'd)
EC-101
Page 826 of 2898
6 CHECK VACUUM HOSE
1. Stop engine.
2. Remove the vacuum hose.
3. Check the vacuum hose for splits, kinks and clogging.
SEF109L
OK or NG
OK©1. Clean vacuum port by blowing air.
2. GO TO 4.
NG©1. Replace vacuum hose.
2. GO TO 4.
7 CHECK THROTTLE DRUM OPERATION
Confirm that throttle drum moves to contact the stopper.
SEF850Y
OK or NG
OK©GO TO 10.
NG©GO TO 8.
8 CHECK ACCELERATOR WIRE INSTALLATION
1. Stop engine.
2. Check accelerator wire for slack.
OK or NG
OK©GO TO 9.
NG©1. Adjust accelerator wire. Refer to FE-3, ªAdjusting Accelerator Wireº.
2. GO TO 7.
TROUBLE DIAGNOSIS Ð BASIC INSPECTIONQG
Basic Inspection/Sedan (Cont'd)
EC-102
Page 827 of 2898
9 CHECK THROTTLE VALVE OPERATION
1. Remove intake air ducts.
2. Check throttle valve operation when moving throttle drum by hand.
OK or NG
OK©1. Retighten the throttle drum fixing nuts.
2. GO TO 7.
NG©1. Clean the throttle body and throttle valve.
2. GO TO 7.
10 CHECK THROTTLE POSITION SWITCH CLOSED POSITION-I
NOTE:
Always check ignition timing before performing the following.
1. Warm up engine to normal operating temperature.
2. Stop engine.
3. Remove the vacuum hose connected to the throttle opener.
4. Connect suitable vacuum hose to vacuum pump as shown below.
SEF793WA
5. Apply vacuum [more than þ40.0 kPa (±400 mbar, þ300 mmHg, þ11.81 inHg)] until the throttle drum is free from the
throttle opener rod.
Models with CONSULT-II©GO TO 11.
Models without CON-
SULT-II©GO TO 15.
TROUBLE DIAGNOSIS Ð BASIC INSPECTIONQG
Basic Inspection/Sedan (Cont'd)
EC-103
Page 828 of 2898
11 CHECK THROTTLE POSITION SWITCH CLOSED POSITION-II
With CONSULT-II
1. Connect ªCONSULT-IIº to the data link connector and select ªENGINEº from the menu. Refer to EC-83.
2. Turn ignition switch ªONº.
3. Select ªTP SW/TP SEN IDLE POSI ADJº in ªWORK SUPPORTº mode with CONSULT-II.
4. Read ªCLSD THL/P SWº signal under the following conditions.
+Insert a 0.05 mm (0.0020 in) and 0.15 mm (0.0059 in) feeler gauge alternately between stopper and throttle drum as
shown in the figure and check the signal.
SEF073X
SEF715Y
ªCLSD THL/P SWº signal should remain ªONº while inserting 0.05 mm (0.0020 in) feeler gauge.
ªCLSD THL/P SWº signal should remain ªOFFº while inserting 0.15 mm (0.0059 in) feeler gauge.
OK or NG
OK©GO TO 14.
NG©GO TO 12.
TROUBLE DIAGNOSIS Ð BASIC INSPECTIONQG
Basic Inspection/Sedan (Cont'd)
EC-104
Page 829 of 2898
12 ADJUSTMENT THROTTLE POSITION SWITCH CLOSED POSITION-I
With CONSULT-II
1. Loosen throttle position sensor fixing bolts.
2. Confirm that proper vacuum is applied. Refer to test No. 10. During adjustment, vacuum should be applied.
3. Insert 0.05 mm (0.0020 in) feeler gauge between stopper and throttle drum as shown in the figure.
SEF073X
4. Turn throttle position sensor body counterclockwise until ªCLSD THL/P SWº signal switches to ªOFFº.
SEF863Y
©GO TO 13.
TROUBLE DIAGNOSIS Ð BASIC INSPECTIONQG
Basic Inspection/Sedan (Cont'd)
EC-105
Page 830 of 2898
13 ADJUSTMENT THROTTLE POSITION SWITCH CLOSED POSITION-II
With CONSULT-II
1. Temporarily tighten sensor body fixing bolts as follows.
+Gradually move the sensor body clockwise and stop it when ªCLSD THL/P SWº signal switches from ªOFFº to
ªONº, then temporarily tighten sensor body fixing bolts.
SEF964W
2. Make sure two or three times that the signal is ªONº when the throttle valve is closed and ªOFFº when it is opened.
3. Remove 0.05 mm (0.0020 in) feeler gauge then insert 0.15 mm (0.0059 in) feeler gauge.
4. Make sure two or three times that the signal remains ªOFFº when the throttle valve is closed.
5. Tighten throttle position sensor.
6. Check the ªCLSD THL/P SWº signal again.
SEF716Y
The signal remains ªOFFº while closing throttle valve.
OK or NG
OK©GO TO 14.
NG©GO TO 12.
TROUBLE DIAGNOSIS Ð BASIC INSPECTIONQG
Basic Inspection/Sedan (Cont'd)
EC-106
Page 831 of 2898
14 RESET THROTTLE POSITION SENSOR IDLE POSITION MEMORY
With CONSULT-II
NOTE:
Always warm up engine to normal operating temperature. If engine is cool, the throttle position sensor idle posi-
tion memory will not be reset correctly.
1. Confirm that proper vacuum is applied. Refer to Test No. 10.
2. Attach blind cap to vacuum port from which vacuum hose to throttle opener was disconnected.
3. Start engine.
4. Warm up engine to normal operating temperature.
5. Select ªTP SW/TP SEN IDLE POSI ADJº in ªWORK SUPPORTº mode.
6. Stop engine. (Turn ignition switch ªOFFº.)
7. Turn ignition switch ªONº and wait at least 5 seconds.
SEF864V
8. Turn ignition switch ªOFFº and wait at least 9 seconds.
9. Repeat steps 7 and 8 until ªCLSD THL POSº signal changes to ªONº.
SEF715Y
©GO TO 19.
TROUBLE DIAGNOSIS Ð BASIC INSPECTIONQG
Basic Inspection/Sedan (Cont'd)
EC-107
Page 832 of 2898
15 CHECK THROTTLE POSITION SWITCH CLOSED POSITION-II
Without CONSULT-II
1. Disconnect closed throttle position switch harness connector.
2. Check continuity between closed throttle position switch terminals4and5under the following conditions.
SEF711X
+Insert the 0.05 mm (0.0020 in) and 0.15 mm (0.0059 in) feeler gauge alternately between the stopper and throttle drum
as shown in the figure.
SEF073X
ªContinuity should existº while inserting 0.05 mm (0.0020 in) feeler gauge.
ªContinuity should not existº while inserting 0.15 mm (0.0059 in) feeler gauge.
OK or NG
OK©GO TO 18.
NG©GO TO 16.
TROUBLE DIAGNOSIS Ð BASIC INSPECTIONQG
Basic Inspection/Sedan (Cont'd)
EC-108