2001 SUZUKI GRAND VITARA Meter fuse

ENGINE GENERAL INFORMATION AND DIAGNOSIS (H27 ENGINE) 6-1-61
DTC P0135 HO2S-1 (Bank 1) Heater Circuit Malfunction
WIRING DIAGRAM
Refer to DTC P0130.
DTC DETECTING CONDITION AND TROUBLE AREA
DTC CONFIRMATION PROCEDURE
1) Connect scan tool with ignition switch OFF.
2) Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool and run
engine at idle speed for 5 min.
3) Check pending DTC by using scan tool.
TROUBLESHOOTING
DTC DETECTING CONDITION TROUBLE AREA
Following condition is detected when HO2S heater is
electrically live (2 driving cycle detection logic).
• Current of HO2S heater is 5.3 A or more or less than
0.09 A, or
• Voltage of HO2S heater is 14.0 V or higher or lower
than 11.7 V.HO2S-1 heater circuit
HO2S-1 heater
ECM (PCM)
HO2S heater relay
NOTE:
Check to make sure that following conditions are satisfied when using this “DTC CONFIRMATION
PROCEDURE”.
Intake air temp. : – 8°C (18°F) or higher
Engine coolant temp. : – 8 – 110°C (18 – 230°F)
Altitude (barometric pressure) : 2400 m, 8000 ft or less (560 mmHg (75 kPa) or more)
Step Action Yes No
1 Was “ENGINE DIAG. FLOW TABLE” per-
formed?Go to Step 2. Go to “ENGINE
DIAG. FLOW TABLE” in
this section.
2 HO2S-1 heater check :
1) Disconnect HO2S-1 coupler with ignition
switch OFF.
2) Check resistance between “3” and “4” termi-
nal of HO2S-1 coupler.
HO2S-1 heater resistance :
5.0 – 6.4
Ω
ΩΩ Ω (at 20°C (68°F))
Is it within above specification?Go to Step 3. Replace HO2S-1.
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. (See Fig.)
Is each voltage 10 – 14 V?Go to Step 4. “HO2S”, and/or “IG
METER” fuse blown.
If OK, faulty “BLK/WHT”
wire or “BLU/WHT” wire.

6-1-66 ENGINE GENERAL INFORMATION AND DIAGNOSIS (H27 ENGINE)
TROUBLESHOOTING
Fig. for STEP 2, 3Step Action Yes No
1 Was “ENGINE DIAG. FLOW TABLE” per-
formed?Go to Step 2. Go to “ENGINE DIAG.
FLOW TABLE” in this
section.
2 HO2S-2 heater check :
1) Disconnect HO2S-2 coupler with ignition
switch OFF.
2) Check resistance between “3” and “4” termi-
nal of HO2S-2 connector.
HO2S -2 heater resistance :
11.7 – 14.3
Ω
ΩΩ Ω (at 20°C (68°F))
Is it within above specificationGo to Step 3. Replace HO2S-2.
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. (See Fig.)
Is each voltage 10 – 14 V?Go to Step 4. Fuse “HO2S” and/or “IG
METER” blown.
If OK, faulty “BLK/WHT”
wire or “BLU/WHT” 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 C51-2-16 and
ground.
Is the voltage 10 – 14 V?Substitute a known-good
ECM (PCM) and recheck.Faulty HO2S heater relay
or “BLK” wire open, “BLU”
wire open or shorted to
ground circuit, “WHT/
BLK” wire open or shorted
to ground circuit.
If OK, substitute a known-
good ECM (PCM) and
recheck.
a. HO2S heater relay

6-1-70 ENGINE GENERAL INFORMATION AND DIAGNOSIS (H27 ENGINE)
DTC P0155 HO2S-1 (Bank 2) Heater Circuit Malfunction
WIRING DIAGRAM
Refer to DTC P0150.
DTC DETECTING CONDITION AND TROUBLE AREA
DTC CONFIRMATION PROCEDURE
1) Connect scan tool with ignition switch OFF.
2) Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool and run
engine at idle speed for 5 min.
3) Check pending DTC by using scan tool.
TROUBLESHOOTING
DTC DETECTING CONDITION TROUBLE AREA
Following condition is detected when HO2S heater is
electrically live (2 driving cycle detection logic).
• Current of HO2S heater is 5.3 A or more or less than
0.09 A, or
• Voltage of HO2S heater is 14.0 V or higher or lower
than 11.7 V.HO2S-1 heater circuit
HO2S-1 heater
ECM (PCM)
NOTE:
Check to make sure that following conditions are satisfied when using this “DTC CONFIRMATION
PROCEDURE”.
Intake air temp. : – 8°C (18°F) or higher
Engine coolant temp. : – 8 – 110°C (18 – 230°F)
Altitude (barometric pressure) : 2400 m, 8000 ft or less (560 mmHg (75 kPa) or more)
Step Action Yes No
1 Was “ENGINE DIAG. FLOW TABLE” per-
formed?Go to Step 2. Go to “ENGINE
DIAG. FLOW TABLE” in
this section.
2 HO2S-1 heater check :
1) Disconnect HO2S-1 coupler with ignition
switch OFF.
2) Check resistance between “3” and “4” termi-
nal of HO2S-1 coupler.
HO2S-1 heater resistance :
5.0 – 6.4
Ω
ΩΩ Ω (at 20°C (68°F))
Is it within above specification?Go to Step 3. Replace HO2S-1.
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. (See Fig.)
Is each voltage 10 – 14 V?Go to Step 4. “HO2S”, and/or “IG
METER” fuse blown.
If OK, faulty “BLK/WHT”
wire or “BLU/WHT” wire.

ENGINE GENERAL INFORMATION AND DIAGNOSIS (H27 ENGINE) 6-1-75
TROUBLESHOOTING
Fig. for STEP 2, 3Step Action Yes No
1 Was “ENGINE DIAG. FLOW TABLE” per-
formed?Go to Step 2. Go to “ENGINE DIAG.
FLOW TABLE” in this
section.
2 HO2S-2 heater check :
1) Disconnect HO2S-2 coupler with ignition
switch OFF.
2) Check resistance between “3” and “4” termi-
nal of HO2S-2 connector.
HO2S -2 heater resistance :
11.7 – 14.3
Ω
ΩΩ Ω (at 20°C (68°F))
Is it within above specificationGo to Step 3. Replace HO2S-2.
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. (See Fig.)
Is each voltage 10 – 14 V?Go to Step 4. Fuse “HO2S” and/or “IG
METER” blown.
If OK, faulty “BLK/WHT”
wire or “BLU/WHT” 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 C51-2-17 and
ground.
Is the voltage 10 – 14 V?Substitute a known-good
ECM (PCM) and recheck.Faulty HO2S heater relay
or “BLK” wire open, “BLU”
wire open or shorted to
ground circuit, “PNK/
WHT” wire open or
shorted to ground circuit.
If OK, substitute a known-
good ECM (PCM) and
recheck.
a. HO2S heater relay

6E2-8 ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE)
Electronic Control System
The electronic control system consists of 1) various sensors which detect the state of engine and driving condi-
tions, 2) ECM (PCM) which controls various devices according to the signals from the sensors and 3) various
controlled devices.
Functionally, it is divided into the following sub systems:
•Fuel injection control system
•Heated oxygen sensor heater control system (if equipped)
•Idle air control system
•Fuel pump control system
•Evaporative emission control system
•Ignition control system
•EGR system (if equipped)
Also, with A/T model, PCM controls A/T.
INFORMATION SENSORS CONTROLLED DEVICES OTHERS
1. IAT sensor a : A/C condenser fan motor relay (if equipped) A : Main fuse box
2. MAP sensor (if equipped) b : Ignition coil assemblies B : ECM (PCM)
3. Heated oxygen sensor (sensor 1) (if equipped) c : EVAP canister purge valve C : Data link connector
4. ECT sensor d : EGR valve (if equipped) D : Combination meter
5. TP sensor e : Idle air control valve E : Fuse box
6. MAF sensor f : Injectors F : EVAP canister
7. Camshaft position sensor (CMP sensor) g : Malfunction indicator lamp
8. ABS control module h : Fuel pump relay
9. Crankshaft position sensor (CKP sensor) (if equipped) i : Main relay
10. Power steering pressure switch (PSP switch) j : Oxygen sensor heater relay (if equipped)
11. CO adjusting resistor (if equipped)
12. Monitor connector (if equipped)
13. Transmission range switch (A/T)
14. Knock sensor
NOTE:
Above figure shows left-hand steering vehicle. For right-hand steering vehicle, parts with (*) are
installed at the side of symmetry.

IGNITION SYSTEM (FOR H27 ENGINE) 6F2-3
System Wiring
NOTE:
For ECM (PCM) terminal assignment, refer to Section 6E2.
1. To ignition switch 8. Ignition coil assembly (For No.3 cylinder)
2.“IG COIL METER” fuse 9. Ignition coil assembly (For No.4 cylinder)
3. ECM (or PCM) 10. Spark plug
4. CMP sensor 11. Ignition coil assembly (For No.5 cylinder)
5. Noise suppressor 12. Ignition coil assembly (For No.6 cylinder)
6. Ignition coil assembly (For No.1 cylinder) 13. To main relay
7. Ignition coil assembly (For No.2 cylinder) 14. Sensed information

7B1-14 AUTOMATIC TRANSMISSION (4 A/T)
Diagnostic Trouble Code Table
Refer to the same item in Section 6-1.
Fail Safe Table
Refer to the same item in Section 6-1.
Visual Inspection
Visually check following parts and systems.
A/T Basic Check
This inspection is important for troubleshooting when PCM (ECM) has detected no DTC and no abnormality has
been noted in visual inspection. Follow flow table carefully.INSPECTION ITEM REFERRING SECTION
•A/T fluid - - - - - level, leakage, color SECTION 0B
•A/T fluid hoses - - - - - disconnection, looseness, deterioration SECTION 7B1
•Throttle (accelerator) cable - - - - - play, installation SECTION 6E2
•A/T throttle cable - - - - - play, installation SECTION 7B1
•A/T select cable - - - - - installation, operation SECTION 7B1
•Engine oil - - - - - level, leakage SECTION 0B
•Engine coolant - - - - - level, leakage SECTION 0B
•Battery - - - - - fluid level, corrosion of terminal
•Connectors of electric wire harness - - - - - disconnection, friction Section 6-1 or 7B1
•Fuses - - - - - burning SECTION 8
•Parts - - - - - installation, damage
•bolt - - - - - looseness
•Other parts that can be checked visually
•Also check following items at engine start, if possible.
–“O/D OFF” lamp - - - - - Operation SECTION 7B1
–“POWER” lamp - - - - - Operation SECTION 7B1
–Malfunction indicator lamp (“SERVICE ENGINE SOON” lamp) - -
- - - OperationSection 6-1
–Charge warning lamp - - - - - Operation SECTION 6H
–Engine oil pressure warning lamp - - - - - Operation SECTION 8C (SECTION 6A2 for pres-
sure check)
–Engine coolant temp. meter - - - - - Operation
–Other parts that can be checked visually
Step Action Yes No
1Was “AUTOMATIC TRANSMISSION DIAGNOSTIC
FLOW TABLE” performed?Go to Step 2. Go to “AUTOMATIC
TRANSMISSION DIAG-
NOSTIC FLOW TABLE”.
2Perform “MANUAL ROAD TEST” in this section.
Is it OK?Go to Step 3. Go to Step 4.
3Proceed to “TROUBLE DIAGNOSIS TABLE 1” in this
section.
Is trouble identified?Repair or replace
defective parts.Go to Step 5.

INSTRUMENTATION/DRIVER INFORMATION 8C-3
COMBINATION METER INTERNAL CIRCUITS
COMBINATION METER COUPLERS
[A] : Coupler A [B] : Coupler B [C] : Coupler C
1. To Cruise control module (if equipped) GRY/YEL 1. To door switch (drive side) BLK/BLU 1. To ground BLK
2. Blank–2. To transmission range switch
(A/T vehicle only, if equipped) LGRN/BLU 2. To ECM (PCM for A/T vehicle) BRN
3. To ignition switch BLK/WHT 3. To transmission range switch
(A/T vehicle only, if equipped) 2GRN/ORN 3. To ignition switch PPL/RED
4. Blank–4. To transmission range switch
(A/T vehicle only, if equipped) DYEL/GRN 4. To brake fluid level switch RED/BLK
5. To ABS control module (if equipped) BLU/ORN 5. To transmission range switch
(A/T vehicle only, if equipped) NORN/BLU 5. To parking brake switch PPL
6. To PCM (A/T vehicle only) GRY/BLU 6. To transmission range switch
(A/T vehicle only, if equipped) PORN/GRN 6. To seat belt switch GRY/RED
7. To ABS control module (if equipped) BRN 7. To transmission range switch
(A/T vehicle only, if equipped) RRED 7. To generator WHT/RED
8. To VSS BLU/YEL 8. To illumination control module RED/GRN 8. To engine oil pressure switch YEL/BLK
9. To combination switch GRN/RED 9. To PCM (A/T vehicle only) WHT/BLK 9. To combination switch RED/YEL
10. To air bag SDM BLU 10. To ECT sensor YEL/WHT 10. To ignition switch BLU/RED
11. To main fuse WHT/BLU 11. To fuel level gauge BLU/WHT
12. To fuse box WHT 12. To ground BLU/YEL
13. To combination switch RED 13. To combination switch GRN/YEL
14. To immobilizer control module
(if equipped)PPL
15. To ECM (PCM for A/T vehicle) PPL/YEL
16. To ECM (PCM for A/T vehicle) ORN/BLK
P R N D 2 LCRUISEPOWER4WDSPEED
METERTACHO
METERFUEL
METERTEMP.
METER
A-11
A-13 A-8 B-12 B-11 C-8 A-15 A-6 A-1 B-9 A-16 A-14 C-7 C-1 A-10 C-3 C-4 C-5 A-7 A-5 B-8 B-1B-10 C-2 A-12 A-3B-13 B-2 B-3 B-4 B-5 B- B-6 C-9 C-10 A-9ABS circuit EBD circuit Air bag circuit
or ABS or BRAKE
if equipped
or CHECK
ENGINE
NOTE:
Terminal arrangement of coupler viewed from harness side.