YH4
GRAND
VITARA
6-1-96
ENGINE (H25 ENGINE)
SYSTEM DESCRIPTION
EGR system consists of EGR valve and its passage. ECM (PCM) judges EGR valve opening based on following
items. (engine speed, engine load, engine coolant temperature, intake air temperature and vehicle speed)
If EGR system is in good condition, intake manifold absolute pressure is varied within specified value as soon as
ECM (PCM) opens EGR valve.
DTC DETECTING CONDITION AND TROUBLE AREA
DTC DETECTING CONDITION
TROUBLE AREA
The difference of intake manifold absolute pressure before and
after EGR valve is opened is out of specification.
EGR valve
EGR circuit
EGR system
MAP sensor
ECM (PCM)
DTC CONFIRMATION PROCEDURE
NOTE:
Check to make sure that following conditions are satisfied when using this DTC CONFIRMATION PROCE-
DURE.
WARNING:
When performing a road test, select a place where there is no traffic or possibility of a traffic accident
and very careful during to avoid occurrence of an accident.
Road test, should be carried out with 2 person, a driver and tester, on a level road.
Intake air temperature: between – 14 C and 70 C (6.8 F and 158 F)
Atmospheric pressure: higher than 560 mmHg (Altitude: lower than 2790 m (9150 ft))
Following DTC is not detected: P1408
(1) With ignition switch OFF, connect scan tool.
(2) Turn ON ignition switch and clear DTC by using scan tool if any.
(3) Start engine and warm up to normal operating temperature.
(4) Increase vehicle speed to 50 – 65 km / h (30 – 40 mph) (engine speed; 2000 – 3000 r / min.).
(5) Keep above vehicle speed for 3 min. (Throttle valve operating is kept constant in this step.)
(6) Stop vehicle and check DTC and pending DTC by using scan tool.
DTC TROUBLESHOOTING
STEP
ACTION
YES
NO
1
Was “ENGINE DIAG. FLOW TABLE” performed?
Go to Step 2.
Go to “ENGINE
DIAG. FLOW
TABLE”.
2
Do you have SUZUKI scan tool?
Go to Step 3.
Go to Step 4.
3
EGR Valve Operation check:
(1) With ignition switch OFF, install SUZUKI scan tool.
(2) Check EGR system referring to “ENGINE AND
EMISSION CONTROL” section.
Is it in good condition?
Intermittent trouble.
If OK, substitute a
known-good ECM
(PCM) and recheck.
Go to Step 4.
4
EGR Valve Power Supply Circuit check:
(1) With ignition switch OFF, disconnect EGR valve
Go to Step 5.
Faulty “Bl / B” wire.
( )
g
coupler (1).
(2) With ignition switch ON, check voltage between
C04-2 (b) and ground, C04-5 (e) and ground.
Is each voltage 10 – 14 V?
Содержание 2000 Grand Vitara SQ416
Страница 75: ...ENGINE DIAGNOSIS G16 J20 ENGINES 6 71 Fig 1 for Step 3...
Страница 179: ...6 1 68 ENGINE H25 ENGINE a Fig for STEP 2 3 a HO2S heater relay...
Страница 190: ...ENGINE H25 ENGINE 6 1 79 a Fig for STEP 2 3 a HO2S heater relay...
Страница 205: ...6 1 94 ENGINE H25 ENGINE Fig for STEP 4 1 Disconnected CMP sensor coupler 2 BI B wire terminal 3 Gr Y wire terminal...
Страница 541: ...6E1 4 ENGINE AND EMISSION CONTROL SYSTEM G16 J20 ENGINES G16 ENGINE...
Страница 542: ...ENGINE AND EMISSION CONTROL SYSTEM G16 J20 ENGINES 6E1 5...
Страница 543: ...6E1 6 ENGINE AND EMISSION CONTROL SYSTEM G16 J20 ENGINES J20 ENGINE...
Страница 544: ...ENGINE AND EMISSION CONTROL SYSTEM G16 J20 ENGINES 6E1 7...
Страница 549: ...Or W Bl G Bl Y C51 1 22 C51 1 23 C51 1 10 C51 1 11 6E1 12 ENGINE AND EMISSION CONTROL SYSTEM G16 J20 ENGINES...
Страница 552: ...ENGINE AND EMISSION CONTROL SYSTEM G16 J20 ENGINES 6E1 15...
Страница 592: ...6E2 4 ENGINE AND EMISSION CONTROL SYSTEM H25 ENGINE...
Страница 593: ...ENGINE AND EMISSION CONTROL SYSTEM H25 ENGINE 6E2 5...
Страница 597: ...ENGINE AND EMISSION CONTROL SYSTEM H25 ENGINE 6E2 9...
Страница 661: ...IGNITION SYSTEM FOR J20 H25 ENGINES 6F2 13 INSTALLATION For installation reverse removal procedure...
Страница 723: ...6H 30 CHARGING SYSTEM 17 Make sure that rotor turns smoothly...
Страница 729: ...Prepared by Overseas Service Department 1st Ed April 2000 Printed in Japan Printing April 2000 736...