YH4
GRAND
VITARA
6-1-78
ENGINE (H25 ENGINE)
DTC P0155 HO2S (BANK-2 SENSOR-1) HEATER CIRCUIT MALFUNCTION
WIRING DIAGRAM
Refer to DTC P0150.
DTC DETECTING CONDITION AND TROUBLE AREA
DTC DETECTING CONDITION
TROUBLE AREA
Current of HO2S heater is higher than specified value or
lower than specified value.
HO2S
HO2S circuit
ECM (PCM)
DTC CONFIRMATION PROCEDURE
NOTE:
Check to make sure that following conditions are satisfied when using this DTC CONFIRMATION PROCE-
DURE.
WARNING:
D
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.
D
Road test, should be carried out with 2 person, a driver and tester, on a level road.
D
Intake air temperature: between – 14
_
C and 70
_
C (6.8
_
F and 158
_
F)
D
Atmospheric pressure: higher than 560 mmHg (Altitude: lower than 2790 m (9150 ft))
(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 56 km / h (35 mph) or more.
(5) Keep above vehicle speed for 5 min. (Throttle valve operating is kept constant in this step.)
(6) Stop vehicle and run engine at idle speed for 1 min.
(7) 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
HO2S Heater check:
(1) With ignition switch OFF, disconnect HO2S heater
relay.
(2) Check resistance between C51-3-5 and E139-2.
Is the resistance 3 – 3.6
at 20
_
C?
Go to Step 3.
Faulty “Bl”, “B/R” wire.
Faulty HO2S.
3
HO2S Heater Power Supply check:
(1) With ignition switch ON leaving engine OFF, check
voltage between E139-3 and ground, E139-1 and
ground.
Is each voltage 10 – 14 V?
Go to Step 4.
18 and / or 21 fuse
blown.
If OK, faulty “B / W”
wire or “Bl / W” wire.
4
HO2S Heater Control Circuit check:
(1) With ignition switch OFF, install HO2S heater relay.
(2) With ignition switch ON leaving engine OFF, check
voltage between C51-3-5 and ground.
Is the voltage 10 – 14 V?
Substitute a known-
good ECM (PCM)
and recheck.
Faulty HO2S heater
relay or “B / R” wire
shorted to ground
circuit.
If OK, substitute a
known-good ECM
(PCM) and recheck.
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...