2006 SUZUKI SX4 Throttle

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-179
E01-26RED/
BLUEPS signal10 – 14 V Ignition switch turned ON.
—
0 – 1 VWith engine running at idle
speed, and steering wheel
turned to the right or left as
far as it stops.
E01-27 — — — — —
E01-28YEL/
BLKSerial
communication line
for immobilizer coil
antenna10 – 14 V Ignition switch turned ON. —
E01-29BLK/
WHTIgnition switch
signal0 – 1 V Ignition switch turned OFF.
—
10 – 14 V Ignition switch turned ON.
E01-30 WHTStarting motor
control relay output0 – 1 V Ignition switch turned ON.
—
0 – 1 VIgnition switch is turned to
ST (engine cranking)
position.
E01-31 BLK Ground for ECM Below 0.3 V Ignition switch turned ON. —
E01-32 GRNPower supply of
throttle actuator
drive circuit10 – 14 V Ignition switch turned ON. —
E01-33 — — — — —
E01-34 REDOutput for 5 V
power source of
APP sensor (sub)4.5 – 5.5 V Ignition switch turned ON. —
E01-35 BRNOutput for 5 V
power source of
APP sensor (main)4.5 – 5.5 V Ignition switch turned ON. —
E01-36 YELAPP sensor (sub)
signal0.37 – 0.38 VIgnition switch turned ON
and accelerator pedal at
idle position after warmed
up engine.
—
1.70 – 2.00 V
(“Reference
waveform No.30: ”)Ignition switch turned ON
and accelerator pedal at
full depressed position
after warmed up engine.
E01-37 GRNAPP sensor (main)
signal0.75 – 0.85 VIgnition switch turned ON
and accelerator pedal at
idle position after warmed
up engine.
—
3.46 – 4.24 V
(“Reference
waveform No.30: ”)Ignition switch turned ON
and accelerator pedal at
full depressed position
after warmed up engine.
E01-38 — — — — —
E01-39 — — — — —
E01-40 — — — — —
E01-41 — — — — —
E01-42 — — — — —
E01-43 — — — — —
E01-44 — — — — —
E01-45 BRNThrottle actuator
control relay output0 – 1 V Ignition switch turned ON. — Terminal
No.Wire
colorCircuit Normal voltage Condition Remarks

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-187
Reference waveform No.15
Mass air flow sensor signal (1) with engine racing
Reference waveform No.16
EVAP canister purge valve signalReference waveform No.17
Manifold absolute pressure sensor signal (1) with
ignition switch turned ON
Reference waveform No.18
Manifold absolute pressure sensor signal (1) with engine
racing Measurement
terminalCH1: “C01-26” to “C01-27”
CH2: “C01-54” to “C01-55”
Oscilloscope
settingCH1: 1 V/DIV, CH2: 1 V/DIV
TIME: 200 ms/DIV
Measurement
condition• After warmed up to normal
operating temperature
• Engine racing
2. Throttle position sensor signal
3. Racing
4. Idle
Measurement
terminalCH1: “C01-29” to “C01-58”
Oscilloscope
settingCH1: 10 V/DIV
TIME: 40 ms/DIV
Measurement
condition• After warmed up to normal
operating temperature
• EVAP canister purge valve setting
at 52% by using “Engine / Active
Test” of scan tool.
1. ON signal 3. One duty cycle
2. OFF signal 4. 10 – 14 V
I4RS0B110066-01
I4RS0B110067-01
Measurement
terminalCH1: “C01-53” to “C01-55”
CH2: “C01-54” to “C01-55”
Oscilloscope
settingCH1: 2 V/DIV, CH2: 1 V/DIV
TIME: 200 ms/DIV
Measurement
condition• After warmed up to normal
operating temperature
• Ignition switch turned ON
2. Throttle position sensor signal
Measurement
terminalCH1: “C01-53” to “C01-55”
CH2: “C01-54” to “C01-55”
Oscilloscope
settingCH1: 2 V/DIV, CH2: 2 V/DIV
TIME: 200 ms/DIV
Measurement
condition• After warmed up to normal
operating temperature
• Engine racing
2. Throttle position sensor signal
3. Racing
4. Idle
I4RS0B110070-01
I4RS0B110071-01

Downloaded from www.Manualslib.com manuals search engine 1A-190 Engine General Information and Diagnosis:
Reference waveform No.25
Ignition pulse (engine revolution) signal (2) with engine
idling
Reference waveform No.26
Throttle actuator output signal with ignition switch turned
ONReference waveform No.27
Throttle actuator output signal with ignition switch turned
ON Measurement
terminalCH1: “C01-20” to “C01-58”
CH2: “E01-4” to “C01-58”
Oscilloscope
settingCH1: 5 V/DIV, CH2: 5 V/DIV
TIME: 10 ms/DIV
Measurement
condition• After warmed up to normal
operating temperature
• Engine at specified idle speed
[A]: For VVT model
[B]: For non-VVT model
1. Cylinder reference signal (CMP reference signal)
3. 360° crank angle
4. 2 to 4 msec.
5. 10 – 14 V
Measurement
terminalCH1: “C01-45” to “C01-58”
CH2: “C01-44” to “C01-58”
Oscilloscope
settingCH1: 5 V/DIV, CH2: 5 V/DIV
TIME: 2 ms/DIV
Measurement
condition• After warmed up to normal
operating temperature
• Ignition switch turned ON and
accelerator pedal at idle position
I4RS0B110078-01
1. Throttle actuator drive signal (“C01-45” terminal)
2. Throttle actuator drive signal (“C01-44” terminal)
3. ON signal
4. OFF signal
5. One duty cycle
Measurement
terminalCH1: “C01-45” to “C01-58”
CH2: “C01-44” to “C01-58”
Oscilloscope
settingCH1: 5 V/DIV, CH2: 5 V/DIV
TIME: 2 ms/DIV
Measurement
condition• After warmed up to normal
operating temperature
• Ignition switch turned ON and
accelerator pedal at full
depressed position
1. Throttle actuator drive signal (“C01-45” terminal)
2. Throttle actuator drive signal (“C01-44” terminal)
3. ON signal
4. OFF signal
5. One duty cycle
I4RS0B110081-02
I4RS0B110082-02

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-191
Reference waveform No.28
Ignition coil signal and fuel injector signal with engine
crankingReference waveform No.29
Throttle position sensor main (1) and sub (2) signal
Reference waveform No.30
Pedal position sensor main (1) and sub (2) signal Measurement
terminalCH1: “C01-20” to “C01-58”
CH2: “C01-6” to “C01-58”
CH3: “C01-1” to “C01-58”
CH4: “C01-48” to “C01-58”
Oscilloscope
settingCH1: 5 V/DIV, CH2: 5 V/DIV
CH3: 50 V/DIV, CH4: 10 V/DIV
TIME: 200 ms/DIV
Measurement
condition• After warmed up to normal
operating temperature
• Engine at cranking
[A]: For VVT model
[B]: For non-VVT model
1. Cylinder reference signal (CMP reference signal)
2. Ignition coil No.1 and No.4 signal
3. No.1 fuel injector signal
4. Engine start signal
I4RS0B110083-01
Measurement
terminalCH1: “C01-54” to “C01-58”
CH2: “C01-40” to “C01-58”
Oscilloscope
settingCH1: 1 V/DIV, CH2: 1 V/DIV
TIME: 200 ms/DIV
Measurement
condition• After warmed up to normal
operating temperature
• Ignition switch turned ON and
depress accelerator pedal fully
3. Accelerator pedal released
4. Accelerator pedal depressed fully
Measurement
terminalCH1: “E01-37” to “C01-58”
CH2: “E01-36” to “C01-58”
Oscilloscope
settingCH1: 1 V/DIV, CH2: 1 V/DIV
TIME: 100 ms/DIV
Measurement
condition• After warmed up to normal
operating temperature
• Ignition switch turned ON and
depress accelerator pedal fully
3. Accelerator pedal released
4. Accelerator pedal depressed fully
3431
2
I5RW0C110023-01
3431
2
I5RW0C110024-01

Downloaded from www.Manualslib.com manuals search engine 1A-192 Engine General Information and Diagnosis:
Resistance Check
1) Remove ECM from its bracket referring to “Engine Control Module (ECM) Removal and Installation in Section 1C”.
CAUTION!
Never touch terminals of ECM itself or connect voltmeter or ohmmeter (2).

2) Connect special tool to ECM connectors (1) securely.
NOTE
Do not connect the other connector of special tool to ECM.

Special tool
(A): 09933–06320
3) Check resistance between each pair of terminals of special tool connectors (1) as listed in the following table.
CAUTION!
• Be sure to connect ohmmeter probe from wire harness side of coupler.
• Be sure to turn OFF ignition switch for this check.
• Resistance in the following table represents that measured when parts temperature is 20 °C (68 °F).

1
(A)
2
3
I7RW01110032-02
Terminals Circuit Standard resistance Condition
C01-47 to E01-29 Heater of HO2S-2 4 – 15 Ω—
E01-46 to E01-1/16 Radiator cooling fan relay No.1 160 – 240 Ω—
E01-60 to E01-29 Main relay 160 – 240 ΩBattery disconnected and
ignition switch turned ON
E01-15 to E01-29 Fuel pump relay 160 – 240 Ω—
C01-16 to E01-1/16No.3 fuel injector
10.8 – 18.2 Ω—
C01-17 to E01-1/16No.4 fuel injector
C01-4 to E01-1/16EGR valve (stepping motor No.1 coil) (if
equipped)20 – 31 Ω—
C01-29 to E01-1/16 EVAP canister purge valve 28 – 35 Ω—
C01-2 to E01-1/16 No.2 fuel injector 10.8 – 18.2 Ω—
C01-3 to E01-1/16EGR valve (stepping motor No.2 coil) (if
equipped)
20 – 31 Ω— C01-18 to E01-1/16EGR valve (stepping motor No.4 coil) (if
equipped)
C01-19 to E01-1/16EGR valve (stepping motor No.3 coil) (if
equipped)
C01-46 to E01-29 Heater of HO2S-1 2 – 11 Ω—
C01-1 to E01-1/16 No.1 fuel injector 10.8 – 18.2 Ω—
E01-29 to E01-47 A/C compressor relay (if equipped with A/C) 160 – 240 Ω—
E01-58 to E01-1/16A/C condenser cooling fan relay
(if equipped with A/C)160 – 240 Ω—
C01-60 to C01-59 Oil control valve (for engine with VVT system) 6 – 15 Ω—
E01-45 to E01-1/16 Throttle actuator control relay 160 – 240 Ω—

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-195
6ECM ground circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors from ECM.
3) Measure resistance between each “E01-31”, “C01-58”,
“C01-15” and “C01-30” terminals of ECM connector and
body ground.
Is resistance 1
Ω or less?Substitute a known-
good ECM and recheck.“BLK/ORN” or “BLK”
wire is open or high
resistance circuit.
7Main relay circuit check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Using service wire, ground “E01-60” terminal of ECM
connector and measure voltage between each “E01-1”
and “E01-16” terminals of ECM connector and body
ground.
Is voltage 10 – 14 V?Go to Step 11. Go to Step 8.
8Main relay circuit check
1) Remove main relay (1) from individual circuit fuse box
No.1.
2) Check for proper connection to main relay connector at
“BLK/YEL” and “BLK/RED” wire terminals.
3) If OK, measure resistance between each “E01-1” and
“E01-16” wire terminals of ECM connector and “BLK/
RED” wire terminal of main relay connector.
Is resistance 1
Ω or less?Go to Step 9. “BLK/RED” wire is open
circuit or high resistance
circuit.
9Main relay circuit check
1) Remove main relay from individual circuit fuse box No.1
with ignition switch turned OFF.
2) Measure voltage between “BLK/YEL” wire terminal of
main relay connector and body ground.
Is voltage 10 – 14 V?Go to Step 10. “BLK/YEL” wire is open
circuit.
10Main relay check
1) Check main relay referring to “Main Relay, Fuel Pump
Relay, Starting Motor Control Relay, Throttle Actuator
Control Relay and Radiator Cooling Fan Relay
Inspection in Section 1C”.
Is main relay in good condition?“BRN/WHT” wire is
open or high resistance
circuit.Replace main relay. Step Action Yes No
1
I5RW0A110059-02

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-199
Troubleshooting
NOTE
• Before performed trouble shooting, be sure to read the “Precautions of ECM Circuit Inspection”.
• When measuring circuit voltage, resistance and/or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors referring to “Inspection of ECM and Its Circuits”.

Step Action Yes No
1Fuel pump control system check for operation
Is fuel pump heard to operate 2 sec. after ignition switch is
turned ON?Fuel pump circuit is in
good condition.Go to Step 2.
2Fuel pump relay power supply check
1) Disconnect fuel pump relay from individual circuit fuse
box No.1 with ignition switch turned OFF.
2) Check for proper connection to fuel pump relay at each
terminal.
3) If OK, turn ON ignition switch, measure voltage between
“BLK/WHT” wire terminal of fuel pump relay connector
and engine ground.
Is voltage 10 – 14 V?Go to Step 3. “BLK/WHT” wire is open
or shorted to ground
circuit.
3Fuel pump relay power supply check
1) Turn ON ignition switch, measure voltage between “BLK/
RED” wire terminal of fuel pump relay connector and
engine ground.
Is voltage 10 – 14 V?Go to Step 4. “BLK/RED” wire is open
circuit.
4Fuel pump relay check
1) Check fuel pump relay referring to “Main Relay, Fuel
Pump Relay, Starting Motor Control Relay, Throttle
Actuator Control Relay and Radiator Cooling Fan Relay
Inspection in Section 1C”.
Is relay in good condition?Go to Step 5. Faulty relay.
5Fuel pump relay drive signal check
1) Connect fuel pump relay to individual circuit fuse box
No.1.
2) Connect voltmeter between “E01-15” terminal of ECM
connector and vehicle body ground.
3) Measure voltage 2 second after ignition switch is turned
ON.
Is voltage 10 – 14 V?Go to Step 6. “GRN/WHT” wire is
open circuit or shorted
to ground circuit.
I2RH01110132-01

Downloaded from www.Manualslib.com manuals search engine 1A-212 Engine General Information and Diagnosis:
Repair Instructions
Idle Speed and IAC Throttle Valve Opening
Inspection
S6RW0D1106001
Before idle speed check, make sure of the following.
• Lead wires and hoses of electronic fuel injection and
engine and emission control systems are connected
securely.
• Valve lash is checked according to maintenance
schedule.
• Ignition timing is within specification.
• All accessories (wipers, heater, lights, A/C, etc.) are
out of service.
• Air cleaner has been properly installed and is in good
condition.
• No abnormal air drawn in from air intake system.After all items are confirmed, check idle speed and IAC
throttle opening as follows.NOTE
Before starting engine, place transmission
gear shift lever in “Neutral”, and set parking
brake and block drive wheels.

Step Action Yes No
1Is there DTC(s) of ECT sensor circuit (DTC P0116 / P0117 /
P0118) and/or radiator cooling fan circuit (DTC P0480)?Go to corresponding
DTC flow.Go to Step 2.
2Radiator cooling fan control circuit check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Start engine and select “Data List” on scan tool.
3) Warm up engine until coolant temp. is 100 °C, 212 °F or
higher and A/C switch turns OFF (if equipped with A/C).
(If engine coolant temp. dose not rise, check engine
cooling system or ECT sensor.)
Is radiator cooling fan started when engine coolant temp.
reached above temp.?Radiator cooling fan
control system is in
good condition.Perform from Step 2 to
Step 7 in DTC P0480
diag. flow. If OK, Go to
Ste p 3.
3Radiator cooling fan control check
1) Disconnect radiator cooling fan motor connector with
ignition switch turned OFF.
2) Run engine when ECT is over 100 °C, 212 °F.
3) Measure voltage between vehicle body ground and
“BLU/RED” wire terminal of disconnected radiator
cooling fan motor connector.
Is voltage 10 – 14 V?Go to Step 4. “BLU/RED” wire is open
or high resistance
circuit.
4Check radiator cooling fan wire circuit check
1) Turn ignition switch to OFF position.
2) Measure resistance between “BLK” wire terminal of
disconnected radiator cooling fan motor connector and
vehicle body ground.
Is resistance below 1
Ω?Go to Step 5. “BLK” wire is open or
high resistance circuit.
5Radiator cooling fan check
1) Check radiator cooling fan referring to “Radiator Cooling
Fan Assembly On-Vehicle Inspection in Section 1F”.
Is it in good condition?Substitute a known-
good ECM and recheck.Faulty radiator cooling
fan.