YH4
GRAND
VITARA
6-96
ENGINE DIAGNOSIS (G16 / J20 ENGINES)
DTC P1450 BAROMETRIC PRESSURE SENSOR CIRCUIT MALFUNCTION
DTC P1451 BAROMETRIC PRESSURE SENSOR PERFORMANCE PROBLEM
SYSTEM DESCRIPTION
Barometric pressure sensor is installed in ECM (PCM).
DTC DETECTING CONDITION AND TROUBLE AREA
DTC DETECTING CONDITION
TROUBLE AREA
DTC P1450:
Barometric pressure out of specification is detected.
Barometric pressure sensor in ECM (PCM)
DTC P1451:
While running under conditions described for DTC
CONFIRMATION PROCEDURE, barometric pressure
value compared with intake manifold vacuum value in
fuel cut state is not as specified.
(DTC P1451: 2 driving cycles detection logic)
Manifold absolute pressure sensor performance
problem
Barometric pressure sensor in ECM (PCM)
DTC CONFIRMATION PROCEDURE (DTC P1450)
1) Connect scan tool to DLC with ignition switch OFF.
2) Turn ON ignition switch and clear DTC by using scan tool and run engine for 1 min.
3) Check DTC and pending DTC by using scan tool.
DTC CONFIRMATION PROCEDURE (DTC P1451)
WARNING:
When performing a road test, select a place where there is no traffic or possibility of a traffic accident
and be very careful during testing to avoid occurrence of an accident.
Road test should be carried out with 2 persons, a driver and a tester, on a level road.
1) Connect scan tool to DLC with ignition switch OFF.
2) Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool and warm up
engine to normal operating temperature.
3) Increase engine speed to 3,000 r / min. in 3rd gear in case of M / T and “2” range in case of A / T.
4) Release accelerator pedal and with engine brake applied, keep vehicle coasting for 5 sec. or more. (Keep fuel
cut condition for 5 sec. or more) If fuel cut condition is not kept for 5 sec. or more, coast down a slope in engine
speed 1600 – 3000 r / min for 5 sec. or more.
5) Stop vehicle and run engine at idle.
6) Repeat steps 3)
5) 2 times.
7) Check DTC and pending DTC by using scan tool.
TROUBLESHOOTING (DTC P1450 / P1451)
STEP
ACTION
YES
NO
1
Was “ENGINE DIAG. FLOW TABLE” performed?
Go to Step 2.
Go to “ENGINE
DIAG. FLOW
TABLE”.
2
Is DTC P1451?
Go to Step 3.
Substitute a known-
good ECM (PCM)
and recheck.
3
MAP Sensor Check:
1) Check MAP sensor and its circuit referring to Steps 2
and 3 of DTC P1408 Diag. Flow Table.
Is check result satisfactory?
Substitute a known-
good ECM (PCM)
and recheck.
MAP sensor or its
circuit malfunction.
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...