2005 SUZUKI JIMNY oxygen sensor

Downloaded from www.Manualslib.com manuals search engine 6-68 ENGINE GENERAL INFORMATION AND DIAGNOSIS
DTC P0171 Fuel System Too Lean
DTC P0172 Fuel System Too Rich
CIRCUIT DESCRIPTION
[a] : Signal to decrease amount of fuel injection [d] : A/F mixture becomes richer
(Oxygen concentration decreases)1. Injector
[b] : Signal to increase amount of fuel injection [e] : High voltage 2. Heated oxygen sensor-1 (HO2S-1)
[c] : A/F mixture becomes leaner
(Oxygen concentration increases)[f] : Low voltage
DTC DETECTING CONDITION POSSIBLE CAUSE
When following condition occurs while engine running
under closed loop condition.
–Air / fuel ratio too lean
(Total fuel trim (short and long terms added) is more
than 30%)
or
–Air / fuel ratio too rich
(Total fuel trim is less than –30%)
✱
✱✱ ✱2 driving cycle detection logic, continuous monitoring.Vacuum leaks (air drawn in).
Exhaust gas leakage.
Heated oxygen sensor-1 circuit malfunction.
Fuel pressure out of specification.
Fuel injector malfunction (clogged or leakage).
MAP sensor poor performance.
ECT sensor poor performance.
IAT sensor poor performance.
TP sensor poor performance.
EVAP control system malfunction.
PCV valve malfunction.

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DTC P0420 Catalyst System Efficiency below Threshold
CIRCUIT DESCRIPTION
ECM monitors oxygen concentration in the exhaust gas which has passed the three way catalytic converter by
HO2S-2.
When the catalyst is functioning properly, the variation cycle of HO2S-2 output voltage (oxygen concentration) is
slower than that of HO2S-1 output voltage because of the amount of oxygen in the exhaust gas which has been
stored in the catalyst.
REFERENCE
1. Heated oxygen sensor-1 3. Three way catalytic converter 5. To the sensor [B] : Case of TYPE B is shown
(See NOTE)
2. Warm up three way catalytic
converter4. Heated oxygen sensor-2 [A] : Case of TYPE A is shown
(See NOTE)
NOTE:
For TYPE A and TYPE B, refer to the NOTE in “ECM Terminal Voltage Values Table” for applicable
model.
1. Engine running at closed loop
condition2. Fuel cut 3. Idle after fuel cut [A] : Oscilloscope waveforms

Downloaded from www.Manualslib.com manuals search engine ENGINE MECHANICAL (M13 ENGINE) 6A1-21
Exhaust Manifold
REMOVAL
1) Disconnect negative cable at battery.
2) Disconnect heated oxygen sensor coupler (1) (if equipped)
and detach it from its stay.
3) Remove exhaust manifold cover (2).
4) Remove exhaust manifold stiffener (1).
1. Exhaust manifold 4. Exhaust manifold cover Tightening torque
2. Exhaust manifold gasket 5. Engine hook Do not reuse.
3. Heated oxygen sensor (if equipped) 6. Exhaust manifold mounting nut
WARNING:
To avoid danger of being burned, do not service exhaust
system while it is still hot. Service should be performed
after system cools down.

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3) Install exhaust manifold stiffener (1).
Tighten exhaust manifold stiffener bolts to specified torque.
Tightening torque
Exhaust manifold stiffener bolts
(a) : 50 N·m (5.0 kg-m, 36.5 lb-ft)
4) Install exhaust manifold cover (1).
5) Connect heated oxygen sensor coupler (2) and fit coupler to
bracket securely (if equipped).
6) Connect negative cable at battery.
7) Check exhaust system for exhaust gas leakage.

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REMOVAL
1) Relieve fuel pressure referring to “Fuel Pressure Relief Pro-
cedure” in Section 6.
2) Disconnect negative cable at battery.
3) Drain engine oil.
4) Drain coolant by loosening drain plug (1).
5) Remove air cleaner outlet No.1 and No.2 hoses and
breather hose.
6) Remove intake manifold bracket (1) with main harness from
intake manifold.
7) Disconnect the following electric lead wires:
EGR valve (if equipped)
IAC valve (2)
TP sensor (3)
MAP sensor (4)
CMP sensor
ECT sensor
EVAP canister purge valve (5)
Injectors (6)
Ignition coils
Heated oxygen sensor
Ground terminal (7) from intake manifold
Each wire harness clamps
8) Remove heated oxygen sensor bracket from cylinder head
and detach heated oxygen sensor coupler from its bracket. WARNING:
To help avoid danger of being burned, do not remove
drain plug (1) and radiator cap while engine and radiator
are still hot. Scalding fluid and steam can be blown out
under pressure if plug and cap are taken off too soon.

Downloaded from www.Manualslib.com manuals search engine 6A1-74 ENGINE MECHANICAL (M13 ENGINE)
a) For right hand steering vehicle:
With hose connected, detach A/C compressor from its
bracket.
b) For left hand steering vehicle:
i) Recover refrigerant from refrigeration system using recov-
ery and recycling equipment.
ii) Disconnect magnet clutch lead wire.
iii) Remove suction pipe and disconnect discharge pipe from
A/C compressor.
iv) Remove A/C compressor from its bracket.
When servicing above steps, refer to “Compressor” in Section 1B.
14) Remove air cleaner outlet No.1 and No.2 hoses.
15) Disconnect the following electric lead wires:
TP sensor (1)
MAP sensor (2)
CKP sensor (if equipped) (3)
CMP sensor
ECT sensor
Heated oxygen sensor
EGR valve (if equipped)
IAC valve (4)
EVAP canister purge valve (5)
Injectors (6)
Ignition coils
Generator
Starting motor
Oil pressure switch
Ground terminal from intake manifold and cylinder block
Each wire harness clamps
16) Remove intake manifold bracket (7) with main harness from
intake manifold.
17) Remove starting motor referring to “Dismounting” in Section
6G. NOTE:
Suspend removed A/C compressor at a place where no
damage will be caused during removal and installation of
engine assembly.

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18) Remove heated oxygen sensor bracket from cylinder head
and detach No.1 heated oxygen sensor coupler from its
bracket.
19) Release accelerator cable (1) from clamp (2) (for left hand
steering vehicle only) and disconnect accelerator cable from
throttle body.
20) Remove canister purge hose bracket from intake manifold.
21) Disconnect the following hoses:
Brake booster hose (3) from intake manifold
Canister purge hose (4) from EVAP canister purge valve
Fuel feed and return hoses (5) from each pipe
Heater inlet and outlet hoses from each pipe
Vacuum hose (6) (to check valve)
22) Disconnect exhaust pipe (1) from exhaust manifold.
23) Remove clutch housing (torque converter housing for A/T)
lower plate (1).
24) With drive plate locked by using a proper size rod (1) or the
like, remove torque converter bolts (2) (vehicle with A/T).
25) Support transmission. For A/T vehicle, do not jack under A/T
oil pan to support transmission.

Downloaded from www.Manualslib.com manuals search engine ENGINE AND EMISSION CONTROL SYSTEM 6E-1
6F1
6F2
6G
7C1
7D
7E
7A
7A1
7B1
7C1
7D
7E
7F
8A
8B
8C
8D
6H
6E
10
10A
10B
SECTION 6E
ENGINE AND EMISSION CONTROL SYSTEM
CONTENTS
General Description ....................................... 6E-3
Air Intake System ......................................... 6E-5
Fuel Delivery System ................................... 6E-6
Fuel pump ................................................ 6E-6
Electronic Control System ............................ 6E-7
Engine & emission control input / output
table.......................................................... 6E-8
On-Vehicle Service....................................... 6E-15
Accelerator cable adjustment ................. 6E-15
Idle speed / idle air control (IAC) duty
inspection ............................................... 6E-15
Idle mixture inspection / adjustment
(vehicle without heated oxygen
sensor) ................................................... 6E-17
Air Intake System ....................................... 6E-18
Throttle body .......................................... 6E-18
Idle air control valve (IAC valve)............. 6E-21
Fuel Delivery System ................................. 6E-22
Fuel pressure inspection ........................ 6E-22
Fuel pump .............................................. 6E-23
Fuel pressure regulator .......................... 6E-24
Fuel injector ............................................ 6E-25
Electronic Control System .......................... 6E-29Engine control module (ECM) ................ 6E-29
Manifold absolute pressure sensor (MAP
sensor) ................................................... 6E-29
Throttle position sensor (TP sensor) ...... 6E-30
Intake air temperature sensor
(IAT sensor) ........................................... 6E-31
Engine coolant temperature sensor
(ECT sensor) .......................................... 6E-32
Heated oxygen sensor
(Sensor-1 and sensor-2) ........................ 6E-33
Camshaft position sensor....................... 6E-34
Crankshaft position sensor..................... 6E-35
Vehicle speed sensor (VSS) .................. 6E-36
Fuel level sensor (GAUGE).................... 6E-36
Knock sensor ......................................... 6E-36
Main relay, fuel pump relay and A/C
condenser fan control relay .................... 6E-36
Fuel cut operation .................................. 6E-37
A/C condenser fan control system ......... 6E-37
A/C condenser fan ................................. 6E-37
Output signals of throttle valve opening
and engine coolant temp.
(Vehicle with A/T only) ........................... 6E-38
Emission Control System ........................... 6E-38 WARNING:
For vehicles equipped with Supplemental Restraint (Air Bag) System:
Service on and around the air bag system components or wiring must be performed only by an
authorized SUZUKI dealer. Refer to “Air Bag System Components and Wiring Location View” under
“General Description” in air bag system section in order to confirm whether you are performing ser-
vice on or near the air bag system components or wiring. Please observe all WARNINGS and “Ser-
vice Precautions” under “On-Vehicle Service” in air bag system section before performing service
on or around the air bag system components or wiring. Failure to follow WARNINGS could result in
unintentional activation of the system or could render the system inoperative. Either of these two
conditions may result in severe injury.
Technical service work must be started at least 90 seconds after the ignition switch is turned to the
“LOCK” position and the negative cable is disconnected from the battery. Otherwise, the system
may be activated by reserve energy in the Sensing and Diagnostic Module (SDM).
NOTE:
Whether following systems (parts) are used in the particular vehicle or not depends on specifications.
Be sure to bear this in mind when performing service work.
EGR valve
Heated oxygen sensor (s) or CO adjusting resistor
Three way catalytic converter (TWC) and warm up three-way catalytic converter (WU-TWC)