2006 SUZUKI SX4 ignition

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8Communication check between scan tool and ECM
1) Turn ignition switch to OFF position.
2) Connect ECM, BCM, ABS control module and
combination meter connectors.
3) Check communication between scan tool and ECM by
DTC check in ECM.
Is it possible to check DTC in ECM?A/T model: Go to Step
9.
M/T model: Substitute a
known-good ECM and
recheck.Go to Step 4 through
Step 11 of
“Troubleshooting for
CAN-DTC”.
9Communication check between scan tool and TCM
1) Turn ignition switch to OFF position.
2) Connect TCM connectors.
3) Check communication between scan tool and TCM by
DTC check in TCM.
Is it possible to check DTC in TCM?Identify malfunction
control module by
performing Step 13
through Step 14 of
“Troubleshooting for
CAN-DTC”.Go to Step 10.
10Internal circuit check in ECM
1) Turn ignition switch to OFF position and then disconnect
negative (–) cable at battery.
2) Disconnect TCM connectors.
3) Measure resistance between the followings
• Between CAN High terminal on DLC and “C06-17”
terminal on TCM connector
• Between CAN Low terminal on DLC and “C06-7”
terminal on TCM connector
Is each resistance 0 – 1
Ω?Substitute a known-
good TCM and recheck.Substitute a known-
good ECM and recheck. Step Action Yes No

Downloaded from www.Manualslib.com manuals search engine 1A-34 Engine General Information and Diagnosis:
)
U*P0420Catalyst system efficiency below
thresholdOutput waveforms of HO2S-1 and HO2S-2 are similar.2 driving
cycles
)
U*P0443Evaporative emission system purge
control valve circuitMonitor signal of EVAP canister purge valve is different
from command signal. (circuit open or shorted to ground)2 driving
cycles
) P0462 Fuel level sensor circuit lowCircuit voltage of fuel level sensor is less than
specification.—
) P0463 Fuel level sensor circuit highCircuit voltage of fuel level sensor is more than
specification.—
)
U*P0480Fan 1 control circuitMonitor signal of radiator cooling fan relay is different from
command signal.1 driving
cycle
)
UP0481Fan 2 control circuitMonitor signal of A/C condenser cooling fan relay is
different from command signal.—
) *P0500 Vehicle speed sensor No VSS signal during fuel cut for specified time or longer.2 driving
cycles
) P0532A/C refrigerant pressure sensor
circuit lowOutput voltage of A/C refrigerant pressure sensor is less
than specification.—
) P0533A/C refrigerant pressure sensor
circuit highOutput voltage of A/C refrigerant pressure sensor is more
than specification.—
) *P0601Internal control module memory
check sum errorData write error or check sum error.1 driving
cycle
) P0602 Control module programming error Data programming error.1 driving
cycle
) *P0607 Control module performance Data programming error.1 driving
cycle
)
U*P0616Starter relay circuit lowStarter signal is low voltage even though engine is started
with vehicle at stop.2 driving
cycles
)
U*P0617Starter relay circuit highStarter signal is high voltage for specified time while
engine is running.2 driving
cycles
) *P1510
ECM backup power supply
malfunctionBackup power voltage is out of specification after starting
engine.1 driving
cycle
) *P2101Throttle actuator control motor
circuit range/performanceMonitor signal of throttle actuator output (duty output) is
inconsistent with throttle actuator control command.1 driving
cycle
) *P2102Throttle actuator control motor
circuit lowPower supply voltage of throttle actuator control circuit is
lower than specification even if throttle actuator control
relay turned on.1 driving
cycle
) *P2103Throttle actuator control motor
circuit highPower supply voltage of throttle actuator control circuit is
higher than specification even if throttle actuator control
relay turned off.1 driving
cycle
) *P2111Throttle actuator control system –
stuck openThrottle valve default opening is greater than 8° from
complementary closed position when diagnosing throttle
valve at ignition switch turned OFF.1 driving
cycle
) *P2119Throttle actuator control throttle
body range/performanceDifference between actual throttle valve opening angle
and opening angle calculated by ECM is more than
specification.1 driving
cycle
) *P2122Pedal position sensor (main) circuit
low inputOutput voltage of pedal position sensor (main) is lower
than specification.1 driving
cycle
) *P2123Pedal position sensor (main) circuit
high inputOutput voltage of pedal position sensor (main) is higher
than specification.1 driving
cycle
) *P2127Pedal position sensor (sub) circuit
low inputOutput voltage of pedal position sensor (sub) is lower
than specification.1 driving
cycle
) *P2128Pedal position sensor (sub) circuit
high inputOutput voltage of pedal position sensor (sub) is higher
than specification.1 driving
cycle
) *P2135Throttle position sensor (main / sub)
voltage correlationDifference between the opening angle based on throttle
position sensor (main) and the opening angle based on
throttle position sensor (sub) is more than specification.1 driving
cycle DTC No. Detecting itemDetecting condition
(DTC will set when detecting:)MIL

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-37
) P0122 Throttle position sensor (main) circuit low• ECM turns off throttle actuator control relay and
throttle valve is fixed at the opening of about 7°
from its completely closed position (default
opening).
• ECM controls fuel cut at specified engine speed.
• ECM stops air/fuel ratio control.
) P0123 Throttle position sensor (main) circuit high• ECM turns off throttle actuator control relay and
throttle valve is fixed at the opening of about 7°
from its completely closed position (default
opening).
• ECM controls fuel cut at specified engine speed.
• ECM stops air/fuel ratio control. ) P0222 Throttle position sensor (sub) circuit low
) P0223 Throttle position sensor (sub) circuit high
) P0335 Crankshaft position sensor circuit • Ignition timing is fixed.
) P0340 Camshaft position sensor circuitECM changes injection control system from
sequential injection to simultaneous one.
) P0500 Vehicle speed sensor• ECM controls actuators assuming that vehicle
speed is 0 km/h (0 mile/h).
• ECM stops IAC feedback control.
) P2101Throttle actuator control motor circuit range
/ performance)• ECM turns off throttle actuator control relay and
throttle valve is fixed at the opening of about 7°
from its completely closed position (default
opening).
• ECM controls fuel cut at specified engine speed. ) P2102 Throttle actuator control motor circuit low
) P2103 Throttle actuator control motor circuit highECM controls fuel cut at specified engine speed.
) P 2 111Throttle actuator control system – stuck
open)• ECM turns off throttle actuator control relay and
throttle valve is fixed at the opening of about 7°
from its completely closed position (default
opening).
• ECM controls fuel cut at specified engine speed.
) P2119Throttle actuator control throttle body range
/ performance)• ECM turns off throttle actuator control relay and
throttle valve is fixed at the opening of about 7°
from its completely closed position (default
opening).
• ECM controls fuel cut at specified engine speed.
) P2122Pedal position sensor (main) circuit low
input)
• ECM turns off throttle actuator control relay and
throttle valve is fixed at the opening of about 7°
from its completely closed position (default
opening).
• ECM controls fuel cut at specified engine speed. ) P2123Pedal position sensor (main) circuit high
input)
) P2127 Pedal position sensor (sub) circuit low input)
) P2128Pedal position sensor (sub) circuit high
input)
) P2135Throttle position sensor (main) / (sub)
voltage correlation)
) P2138Pedal position sensor (main) / (sub) voltage
correlation)
) P2228 Barometric pressure circuit low ECM controls actuators assuming that barometric
pressure is 101.33 kPa (762 mmHg). ) P2229 Barometric pressure circuit high DTC No. Detected item Fail-safe operation

Downloaded from www.Manualslib.com manuals search engine 1A-38 Engine General Information and Diagnosis:
Scan Tool DataS6RW0D1104007
As the data values are standard values estimated on the basis of values obtained from the normally operating vehicles
by using a scan tool, use them as reference values. Even when the vehicle is in good condition, there may be cases
where the checked value does not fall within each specified data range. Therefore, judgment as abnormal should not
be made by checking with these data alone.
Also, conditions that can be checked by the scan tool are those detected by ECM and output from ECM as commands
and there may be cases where the engine or actuator is not operating (in the condition) as indicated by the scan tool.
Be sure to use the timing light to check the ignition timing.
NOTE
• There are two types of OBD system depending on the vehicle specification.
For identification, refer to “Precaution on On-Board Diagnostic (OBD) System”.
• With the CAN communication generic scan tool, only star (*) marked data in the following table can
be read.
• When checking the data with the engine running at idle or racing, be sure to shift M/T gear to the
neutral position and A/T gear to the “Park” position and pull the parking brake fully. Also, if nothing
or “no load” is indicated, turn OFF A/C (if equipped with A/C), all electric loads, P/S and all the other
necessary switches.

Scan tool data Vehicle conditionNormal condition /
reference values
*) COOLANT TEMP
(ENGINE COOLANT TEMP.)At specified idle speed after warming up 80 – 100 °C, 176 – 212 °F
*) INTAKE AIR TEMP. At specified idle speed after warming up–5 °C (23 °F) + environmental
temp. to 40 °C (104 °F) +
environmental temp.
*) ENGINE SPEED It idling with no load after warming up Desired idle speed ± 50 rpm
) DESIRED IDLE
(DESIRED IDLE SPEED)It idling with radiator cooling fan stopped and all
electrical parts turned OFF after warming up, M/T at
neutral700 rpm
*) MAF
(MASS AIR FLOW RATE)At specified idle speed with no load after warming up1.0 – 4.0 g/s 0.14 – 0.52 lb/
min.
At 2500 r/min. with no load after warming up4.0 – 9.0 g/s 0.53 – 1.58 lb/
min.
*) CALC LOAD
(CALCULATED LOAD
VA L U E )At specified idle speed with no load after warming up 16 – 36%
At 2500 r/min. with no load after warming up 10 – 30%
*) MAP
(INTAKE MANIFOLD
ABSOLUTE PRESSURE) (if
equipped)At specified idle speed with no load after warming up 24 – 38 kPa, 7.1 – 11.2 in.Hg
*) THROTTLE POSITION
(RELATIVE THROTTLE
POSITION)Ignition switch ON /
warmed up engine
stoppedAccelerator pedal released 0 – 12%
Accelerator pedal depressed
fully90 – 100%
*) BAROMETRIC PRES —Barometric pressure is
displayed
) FUEL TANK LEVEL Ignition switch ON 0 – 100%
*) BATTERY VOLTAGE Ignition switch ON / engine at stop 10 – 14 V
) BRAKE SWITCH Ignition switch ONBrake pedal is released OFF
Brake pedal is depressed ON
*) FUEL SYSTEM B1
(FUEL SYSTEM STATUS)At specified idle speed after warming up CLSD (closed loop)
*) O2S B1 S1
(HEATED OXYGEN
SENSOR-1)At specified idle speed after warming up 0.1 – 0.95 V
*)
O2S B1 S2
(HEATED OXYGEN
SENSOR-2) (if equipped)At 2000 r/min. for 3 min. or longer after warming up 0.1 – 0.95 V

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-39
*) SHORT FT B1
(SHORT TERM FUEL TRIM)At specified idle speed after warming up –20 – +20%
*) LONG FT B1
(LONG TERM FUEL TRIM)At specified idle speed after warming up –20 – +20%
) TOTAL FUEL TRIM B1 At specified idle speed after warming up –35 – +35%
) FUEL CUTEngine at fuel cut condition ON
Engine at other than fuel cut condition OFF
) O2S B1 S2 ACT
(HEATED OXYGEN
SENSOR-2) (if equipped)At specified idle speed after warming up ACTIVE
) O2S B1 S1 ACT
(HEATED OXYGEN
SENSOR-1)At specified idle speed after warming up ACTIVE
*) CANIST PRG DUTY
(EVAP CANISTER PURGE
FLOW DUTY)At specified idle speed after warming up 0%
*) IGNITION ADVANCE
(IGNITION TIMING
ADVANCE FOR NO.1
CYLINDER)At specified idle speed with no load after warming up 5 – 15° BTDC
*) EGR VALVE OPENING (if
equipped) At specified idle speed after warming up 0%
) VVT GAP
(TARGET-ACTUAL
POSITION) (VVT model)At specified idle speed after warming up 0 – 3°
) FUEL PUMPWithin 2 seconds after ignition switch ON or engine
runningON
Engine at stop with ignition switch ON OFF
) STARTER SW
(STARTER SWITCH)Ignition switch is turned to ST (engine cranking)
positionON
) A/C PRESSURE
(A/C REFERIGERANT
ABSOLUTE PRESSURE)Engine runningA/C ON (A/C is operating) at
ambient temperature: 30 °C
(86 °F) and humidity: 50%1350 – 1650 kPa For more
details, refer to pressure of
high pressure gage under “A/C
System Performance
Inspection in Section 7B”.
A/C OFF (A/C is not
operating) at ambient
temperature: 30 °C (86 °F)
and engine coolant
temperature: 90 – 100 °C
(194 – 212 °F)600 – 1000 kPa After longer
than 10 min from A/C switch
turned off
) A/C SWITCHEngine running after warming up, A/C not operating OFF
Engine running after warming up, A/C operating ON
) A/C COMP RELAY Engine runningA/C switch and blower motor
switch turned ONON
A/C switch and blower motor
switch turned OFFOFF
) BLOWER FAN Ignition switch ON
Blower fan switch: 2nd
speed position or moreON
Blower fan switch: under 1st
speed positionOFF
) ELECTRIC LOADIgnition switch ON / Headlight, small light, all turned
OFFOFF
Ignition switch ON / Headlight, small light, all turned
ONON Scan tool data Vehicle conditionNormal condition /
reference values

Downloaded from www.Manualslib.com manuals search engine 1A-40 Engine General Information and Diagnosis:
) RADIATOR FAN
(RADIATOR COOLING FAN
CONTROL RELAY)Ignition switch ONEngine coolant temp.: lower
than 97.5 °C (207.5 °F)OFF
Engine coolant temp.: 100
°C (212 °F)ON
) A/C COND FAN
(A/C CONDENSER
COOLING FAN CONTROL
RELAY)Engine runningBlower motor switch and A/C
switch turned ON/ECT over
102.5 °C (216.5 °F)ON
Blower motor switch and/or
A/C switch turned OFFOFF
) TP SENSOR 1 VOLT
(THROTTLE POSITION
SENSOR (MAIN) OUTPUT
VOLTAGE)Ignition switch ON
after warmed up
engineAccelerator pedal released 0.48 – 0.90 V
Accelerator pedal depressed
fully3.37 – 4.55 V
) TP SENSOR 2 VOLT
(THROTTLE POSITION
SENSOR (SUB) OUTPUT
VOLTAGE)Ignition switch ON
after warmed up
engineAccelerator pedal released 1.36 – 1.75 V
Accelerator pedal depressed
fully3.58 – 4.76 V
) APP SENSOR 1 VOLT
(ACCELERATOR PEDAL
POSITION (APP) SENSOR
(MAIN) OUTPUT VOLTAGE)Ignition switch ON
after warmed up
engineAccelerator pedal released 0.69 – 0.81 V
Accelerator pedal depressed
fully3.43 – 4.56 V
) APP SENSOR 2 VOLT
(ACCELERATOR PEDAL
POSITION (APP) SENSOR
(SUB) OUTPUT VOLTAGE)Ignition switch ON
after warmed up
engineAccelerator pedal released 0.31 – 0.44 V
Accelerator pedal depressed
fully1.71 – 2.29 V
*) ACCEL POSITION
(RELATIVE ACCELERATOR
PEDAL POSITION)Ignition switch ON
after warmed up
engineAccelerator pedal released 0 – 3%
Accelerator pedal depressed
fully90 – 100%
*) TARGET THROTTLE
POSI
(TARGET THROTTLE
VALVE POSITION)Ignition switch ON
after warmed up
engineAccelerator pedal released 0 – 3%
Accelerator pedal depressed
fully90 – 100%
) IAC THROTTLE
OPENING
(IDLE AIR CONTROL
THROTTLE VALVE
OPENNING)It idling with no load after warming up 5 – 25%
) THROTTLE MOTOR
VOLTIgnition switch ON / engine at stop 10.0 – 14.0 V
) CLOSED THROTTLE
POS
(CLOSED THROTTLE
POSITION)Throttle valve at idle position ON
Throttle valve opens larger than idle position OFF
) THROTTLE MOTOR
RELAYAt specified idle speed after warming up ON
*) VEHICLE SPEED At stop 0 km/h (0 mph)
) INJ PULSE WIDTH
(FUEL INJECTION PULSE
WIDTH)At specified idle speed with no load after warming up 1.5 – 3.5 msec.
At 2500 r/min. no load after warming up 1.5 – 3.0 msec. Scan tool data Vehicle conditionNormal condition /
reference values

Downloaded from www.Manualslib.com manuals search engine 1A-42 Engine General Information and Diagnosis:
CANIST PRG DUTY (EVAP CANISTER PURGE FLOW
DUTY, %)
This parameter indicates valve ON (valve open) time
rate within a certain set cycle of EVAP canister purge
valve which controls the amount of EVAP purge.
IGNITION ADVANCE (IGNITION TIMING ADVANCE
FOR NO.1 CYLINDER, °)
Ignition timing of No.1 cylinder is commanded by ECM.
The actual ignition timing should be checked by using
the timing light.
EGR VALVE OPENING (%)
This parameter indicates opening rate of EGR valve
which controls the amount of EGR flow.
VVT GAP (TARGET-ACTUAL POSITION, °) (VVT
model)
It is calculated using the formula: target valve timing
advance – actual valve timing advance.
FUEL PUMP (ON/OFF)
ON is displayed when ECM activates the fuel pump via
the fuel pump relay switch.
STARTER SW (STARTER SWITCH, ON/OFF)
This parameter indicates condition of starting motor relay
output.
ON: Starting motor relay is ON
OFF: Starting motor relay is OFF
A/C PRESSURE (A/C REFRIGERANT ABSOLUTE
PRESSURE, kPa)
This parameter indicates A/C refrigerant absolute
pressure calculated by ECM.
A/C SWITCH (ON/OFF)
ON: Command for A/C operation being output from ECM
to HVAC.
OFF: Command for A/C operation not being output.
A/C COMP RELAY (A/C COMPRESSOR RELAY, ON/
OFF)
This parameter indicates the state of the A/C switch.
BLOWER FAN (ON/OFF)
This parameter indicates the state of the blower fan
motor switch.
ELECTRIC LOAD (ON/OFF)
ON: Headlight or small light ON signal inputted.
OFF: Above electric loads all turned OFF.
RADIATOR COOLING FAN (RADIATOR COOLING
FAN CONTROL RELAY, ON/OFF)
ON: Command for radiator cooling fan control relay
operation being output.
OFF: Command for relay operation not being output.A/C COND FAN (A/C CONDENSER COOLING FAN
CONTROL RELAY, ON/OFF)
ON: Command for A/C condenser cooling fan control
relay operation being output.
OFF: Command for relay operation not being output.
TP SENSOR 1 VOLT (THROTTLE POSITION SENSOR
(MAIN) OUTPUT VOLTAGE, V)
The Throttle Position Sensor (Main) reading provides
throttle valve opening information in the form of voltage.
TP SENSOR 2 VOLT (THROTTLE POSITION SENSOR
(SUB) OUTPUT VOLTAGE, V)
The Throttle Position Sensor (Sub) reading provides
throttle valve opening information in the form of voltage.
APP SENSOR 1 VOLT (ACCELERATOR PEDAL
POSITION (APP) SENSOR (MAIN) OUTPUT
VOLTAGE, V)
The Accelerator Pedal Position (APP) Sensor (Main)
reading provides accelerator pedal opening information
in the form of voltage.
APP SENSOR 2 VOLT (ACCELERATOR PEDAL
POSITION (APP) SENSOR (SUB) OUTPUT VOLTAGE,
V)
The Accelerator Pedal Position (APP) Sensor (Sub)
reading provides accelerator pedal opening information
in the form of voltage.
ACCEL POSITION (RELATIVE ACCELERATOR
PEDAL POSITION, %)
When accelerator pedal is at fully released position,
accelerator pedal is indicated as 0 – 3% and 90 – 100%
fully depressed position.
TARGET THROTTLE POSI (TARGET THROTTLE
VALVE POSITION, %)
Target Throttle Valve Position is ECM internal parameter
which indicates the ECM requested throttle valve
position.
IAC THROTTLE OPENING (IDLE AIR (SPEED)
CONTROL THROTTLE VALVE OPENING, %)
This parameter indicates throttle valve opening of idle air
control in %.
(100% indicates the maximum idle air flow.)
THROTTLE MOTOR VOLT (V)
This parameter indicates power supply voltage of throttle
actuator (motor) control circuit (input voltage from
throttle actuator control relay).
CLOSED THROTTLE POS (CLOSED THROTTLE
POSITION, ON/OFF)
This parameter reads ON when throttle valve is fully
closed, or OFF when it is not fully closed.

Downloaded from www.Manualslib.com manuals search engine 1A-44 Engine General Information and Diagnosis:
4Check keyless start control system malfunction
1) Check keyless start control system referring to “Keyless
Start System Operation Inspection in Section 10E”.
Is check result satisfactory?Go to Step 5. Keyless start control
system malfunction.
5Is engine cranked?Go to Step 6. Go to “Cranking System
Symptom Diagnosis in
Section 1I”.
6Does engine start?Go to Step 7. Go to Step 9.
7Check idle speed
1) Check engine idle speed referring to “Idle Speed and
IAC Throttle Valve Opening Inspection”.
Is check result as specified?Go to Step 8. Go to “Engine Symptom
Diagnosis”.
8Check ignition timing
1) Check ignition timing referring to “Ignition Timing
Inspection in Section 1H”.
Is check result as specified?Go to “Engine Symptom
Diagnosis”.Check ignition control
related parts referring to
“Ignition Timing
Inspection in Section
1H”.
9Check immobilizer system malfunction
1) Check immobilizer indicator lamp for flashing.
Is it flashing when ignition switch is turned to ON position?Go to “DTC Check in
Section 10C”.Go to Step 10.
10Check fuel supply
1) Check to make sure that enough fuel is filled in fuel tank.
2) Turn ON ignition switch for 2 seconds and then OFF.
3) Repeat Step 2) a few times.
Is fuel pressure felt from fuel feed hose when ignition switch
is turned ON?Go to Step 12. Go to Step 11.
11Check fuel pump for operation
Was fuel pump operating sound heard from fuel filler for
about 2 seconds after ignition switch ON and stop?Go to “Fuel Pressure
Check”.Go to “Fuel Pump and
Its Circuit Check”.
12Check ignition spark
1) Check ignition spark referring to “Ignition Spark Test in
Section 1H”.
Is it in good condition?Go to Step 13. Go to “Ignition System
Symptom Diagnosis in
Section 1H”.
13Check fuel injector circuit
1) Check fuel injector circuit referring to “Fuel Injector
Circuit Check.”
Is it in good condition?Go to “Engine Symptom
Diagnosis”.Go to “Fuel Injector
Circuit Check”. Step Action Yes No
I5RW0A110014-01