sensor SUZUKI SX4 2006 1.G Service Workshop Manual

Downloaded from www.Manualslib.com manuals search engine 1A-164 Engine General Information and Diagnosis:
DTC Troubleshooting
NOTE
Before this troubleshooting is performed, read the precautions for DTC troubleshooting referring to
“Precautions for DTC Troubleshooting”.

Step Action Yes No
1Was “Engine and Emission Control System Check”
performed?Go to Step 2. Go to “Engine and
Emission Control
System Check”.
2APP sensor and its circuit check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ON ignition switch.
3) Check each voltage of “APP Sensor 1 Volt” and “APP
Sensor 2 Volt” displayed on scan tool when accelerator
pedal is idle position and fully depressed.
Is each APP sensor voltage within specified value in the
table “Scan Tool Data”?Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.Go to Step 3.
3ECM voltage check
1) Disconnect connector from APP sensor assembly with
ignition switch turned OFF.
2) Check for proper connection to APP sensor assembly at
“BRN”, “GRN”, “BLU”, “RED”, “YEL” and “WHT” wire
terminals.
3) If OK, measure voltage between “BRN” wire terminal of
APP sensor assembly connector and vehicle body
ground, between “RED” wire terminal of APP sensor
assembly connector and vehicle body ground with
ignition switch turned ON.
Is each voltage 4 – 6 V?Go to Step 6. Go to Step 4.
4Wire harness check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Check for proper connection of ECM connector at “E01-
35” and “E01-34” terminals
3) If OK, measure resistance between “E01-35” terminal of
ECM connector and engine ground, between “E01-34”
terminal of ECM connector and engine ground.
Is each resistance infinity?Go to Step 5. “BRN” wire or “RED”
wire is shorted to other
circuit.
5Wire harness check
1) Measure voltage between “E01-35” terminal of ECM
connector and engine ground, between “E01-34”
terminal of ECM connector and engine ground with
ignition switch turned ON.
Is each voltage 0 V?Substitute a known-
good ECM and recheck.“BRN” wire or “RED”
wire is shorted to other
circuit.
"GRN" "BLU" "BRN"
"YEL"
"WHT"
"RED"
I4RS0B110048-01

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-165
DTC P2227 / P2228 / P2229: Barometric Pressure Circuit MalfunctionS6RW0D1104068
DTC P2227: Barometric Pressure Circuit Range / Performance
DTC P2228: Barometric Pressure Circuit Low
DTC P2229: Barometric Pressure Circuit High
System Description
Barometric pressure sensor is installed in ECM.
DTC Detecting Condition and Trouble Area6Wire harness check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Check for proper connection of ECM connector at “E01-
37”, “E01-52”, “E01-36” and “E01-51” terminals.
3) If OK, measure resistance between “GRN” wire terminal
of APP sensor assembly connector and vehicle body
ground, between “YEL” wire terminal of APP sensor
assembly connector and vehicle body ground.
Is each resistance infinity?Go to Step 7. “GRN” wire or “YEL”
wire is shorted to other
circuit.
7Wire harness check
1) Turn ON ignition switch.
2) Measure voltage between “E01-37” terminal of ECM
connector and engine ground, between “E01-36”
terminal of ECM connector and engine ground.
Is each voltage 0 V?Go to Step 8. “GRN” wire or “YEL”
wire is shorted to other
circuit.
8APP sensor assembly check
1) 1)Check APP sensor referring to “Accelerator Pedal
Position (APP) Sensor Assembly Inspection in Section
1C”.
Is output voltage within specified value?Substitute a known-
good ECM and recheck.Replace APP sensor
assembly. Step Action Yes No
DTC detecting condition Trouble area
DTC P2227:
Difference of barometric pressure value and intake manifold pressure value
is more than specified value while engine cranking.
(2 driving cycle detection logic)• Manifold absolute pressure sensor
performance problem
• Barometric pressure sensor in ECM
DTC P2228:
Barometric pressure signal is lower than specified value.
(1 driving cycle detection logic)• Barometric pressure sensor in ECM
DTC P2229:
Barometric pressure signal is higher than specified value.
(1 driving cycle detection logic)

Downloaded from www.Manualslib.com manuals search engine 1A-166 Engine General Information and Diagnosis:
DTC Confirmation Procedure
DTC P2227:
WARNING!
• When performing a road test, select a place where there is no traffic or possibility of a traffic
accident and be very careful during testing to avoid occurrence of an accident.
• Road test should be carried out by 2 persons, a driver and a tester, on a level road.

1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool and warm up
engine to normal operating temperature.
3) Check DTC and pending DTC by using scan tool.
DTC P2228 / P2229:
1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch, clear DTC by using scan tool and run engine for 1 min.
3) Check DTC and pending DTC by using scan tool.
DTC Troubleshooting
NOTE
Before this troubleshooting is performed, read the precautions for DTC troubleshooting referring to
“Precautions for DTC Troubleshooting”.

DTC U0073: Control Module Communication Bus OffS6RW0D1104069
Refer to “Troubleshooting for CAN-DTC”.
DTC U0101: Lost Communication with TCMS6RW0D1104082
Refer to “Troubleshooting for CAN-DTC”.
DTC U0121: Lost Communication with ABS Control ModuleS6RW0D1104070
Refer to“Troubleshooting for CAN-DTC”.
DTC U0140: Lost Communication with Body Control ModuleS6RW0D1104071
Refer to“Troubleshooting for CAN-DTC”.Step Action Yes No
1Was “Engine and Emission Control System Check”
performed?Go to Step 2. Go to “Engine and
Emission Control
System Check”.
2Is DTC P2227 set?Go to Step 3. Substitute a known-
good ECM and recheck.
3MAP sensor check
1) Check MAP sensor and its circuit referring to “DTC
P0107: Manifold Absolute Pressure Circuit Low
Input”and/or “DTC P0108: Manifold Absolute Pressure
Circuit High Input”.
Is check result satisfactory?Substitute a known-
good ECM and recheck.MAP sensor or its circuit
malfunction.

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-167
Troubleshooting for CAN-DTCS6RW0D1104084
Perform this troubleshooting when CAN-DTC is detected.
NOTE
• When performing this troubleshooting, be sure to have full understanding of “Precaution on CAN
Troubleshooting” and observe it.
• It may be possible that CAN system has trouble because of fuse blown or low battery voltage.
Before troubleshooting, check to make sure that fuse, battery voltage and generator status are
normal.
• When performing “Communication Bus Check” using SUZUKI scan tool (SUZUKI-SDT) in each step
of this troubleshooting, use the following table to determine whether the control module is in good
condition or not.
Also, while performing “Communication Bus Check”, do not perform any work other than instructed
in this troubleshooting. Or, it may occur that display of control module/sensor on SUZUKI-SDT
screen and/or its background color may change.
• When disconnecting each control module connector in this troubleshooting, various DTCs will be
detected. Be sure to clear DTCs in the following control modules after completing this
troubleshooting.
–ECM
– BCM
–TCM
– Keyless start control module
– 4WD control module
– HVAC control module (Auto A/C model)
– P/S control module

Wiring Diagram
Refer to “Troubleshooting for Communication Error with Scan Tool Using CAN”.
Trouble area
Refer to “Troubleshooting for Communication Error with Scan Tool Using CAN”. Judgment Display of Communication Bus Check
Normal• All connected control modules/sensors (communicated by CAN) are displayed and its back ground
color is “White”.
Abnormal• Even one of connected control modules/sensors (communicated by CAN) is not displayed.
• Display of even one of connected control modules/sensors (communicated by CAN) changes.
• Background color of even one of connected control modules/sensors (communicated by CAN) is
displayed in “Gray” or “Light green”.
• Background color of even one of connected control modules/sensors (communicated by CAN)
changes

Downloaded from www.Manualslib.com manuals search engine 1A-174 Engine General Information and Diagnosis:
C01-10 WHTOxygen signal of
heated oxygen
sensor-10 – 1 V Ignition switch turned ON.
— *Deflects between
over 0.5 V and under
0.45 V
(“Reference
waveform No.8: ” and
“Reference waveform
No.9: ”)While engine running at
2,000 r/min. for 1 min. or
longer after warmed up.
C01-11 BRNOxygen signal of
heated oxygen
sensor-2 (if
equipped)4 – 5 V Ignition switch turned ON.
— *Deflects between
over 0.5 V and under
0.45 V
(“Reference
waveform No.10: ”)While engine running at
2,000 r/min. or more after
vehicle running over 30
km/h, 19 mph for 5 min.
C01-12 WHTCAN (low)
communication line
(active low signal)
to TCM (for A/T
model)*0.5 – 2.5 V
(“Reference
waveform No.23: ”)
Ignition switch turned ON
with engine stop.CAN communication line
signal is pulse. Pulse
signal displayed with a
regular frequency which
varies depending on
engine condition. C01-13 REDCAN (high)
communication line
(active high signal)
to TCM (for A/T
model)*2.5 – 4.5 V
(“Reference
waveform No.23: ”)
C01-14GRY/
REDOutput of 5 V
power source for
MAP sensor and A/
C refrigerant
pressure sensor (if
equipped with A/C)4.5 – 5.5 V Ignition switch turned ON. —
C01-15 BLK Ground for ECM Below 0.3 V Ignition switch turned ON. —
C01-16BLU/
REDFuel injector No.3
output10 – 14 V Ignition switch turned ON. —
*0 – 0.6 V
↑↓
10 – 14 V
(“Reference
waveform No.1: ” and
“Reference waveform
No.11: ”)Engine running at idle
after warmed up engine.Output signal is active low
pulse. Pulse frequency
varies depending on
engine speed.
C01-17BLU/
ORNFuel injector No.4
output10 – 14 V Ignition switch turned ON. —
*0 – 0.6 V
↑↓
10 – 14 V
(“Reference
waveform No.1: ” and
“Reference waveform
No.12: ”)Engine running at idle
after warmed up engine.Output signal is active low
pulse. Pulse frequency
varies depending on
engine speed.
C01-18BRN/
YELEGR valve
(stepper motor coil
4) output (if
equipped)10 – 14 V Ignition switch turned ON. —
*0 – 1 V
↑↓
10 – 14 V
(“Reference
waveform No.4: ”)Ignition switch is turned to
ST (cranking) position.Output signal is active low
duty pulse. Number of
pulse generated times
varies depending on
vehicle condition. Terminal
No.Wire
colorCircuit Normal voltage Condition Remarks

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-175
C01-19WHT/
REDEGR valve
(stepper motor coil
3) output (if
equipped10 – 14 V Ignition switch turned ON. —
*0 – 1 V
↑↓
10 – 14 V
(“Reference
waveform No.4: ”)Ignition switch is turned to
ST (cranking) position.Output signal is active low
duty pulse. Number of
pulse generated times
varies depending on
vehicle condition.
C01-20RED/
YELCMP sensor signal0 – 1 V or 4 – 5 V Ignition switch turned ON. —
*0 – 0.6 V
↑↓
4 – 5 V
(“Reference
waveform No.13: ”
and “Reference
waveform No.14: ”)Engine running at idle
after warmed up engine.Sensor signal is pulse.
Pulse frequency varies
depending on engine
speed.
(6 pulses are generated
per 1 camshaft revolution.)
C01-21 PNK CKP sensor signal0 – 1 V or 4 – 5 V Ignition switch turned ON. —
*4 – 5 V
↑↓
0 – 0.6 V
(“Reference
waveform No.13: ”
and “Reference
waveform No.14: ”)Engine running at idle
after warming up engine.Sensor signal is pulse.
Pulse frequency varies
depending on engine
speed.
(30 (36 – 6) pulses are
generated per 1
crankshaft revolution.)
C01-22 — — — — —
C01-23 — — — — —
C01-24 LT GRNEngine coolant
temp. (ECT)
sensor signal3.5 – 4.0 VIgnition switch turned ON,
ECT at 0 °C, 32 °F.
— 1.38 – 1.72 VIgnition switch turned ON,
ECT at 50 °C, 122 °F.
0.40 – 0.53 VIgnition switch turned ON,
ECT at 100 °C, 212 °F.
C01-25BLK/
YELIntake air temp.
(IAT) sensor signal3.18 – 3.67 VIgnition switch turned ON,
IAT at 0 °C, 32 °F.
— 1.32 – 1.65 VIgnition switch turned ON,
IAT at 40 °C, 104 °F.
0.46 – 0.60 VIgnition switch turned ON,
IAT at 80 °C, 176 °F.
C01-26GRN/
BLKMass air flow
(MAF) sensor
signal0.5 – 1.5 VIgnition switch turned ON
with engine at stop.
— 1.5 – 2.0 V
(“Reference
waveform No.15: ”)When engine running at
specified idle speed after
warmed up.
C01-27 GRYGround for MAF
sensorBelow 0.3 V Ignition switch turned ON. —
C01-28BLU /
YELGeneral control
signal output0 – 1 VEngine: Stop
IG switch: ON
—
10 – 14 VEngine: Idle speed after
warning up
C01-29BLU/
BLKEVAP canister
purge valve output10 – 14 VIgnition switch turned ON
with engine at stop.—
*0 – 0.6 V
↑↓
10 – 14 V
(“Reference
waveform No.16: ”)Set EVAP canister purge
valve at 52% by using
“Engine / Active Test” of
scan tool.Output signal is active low
duty pulse. Duty ratio
varies depending on
vehicle condition.
C01-30 BLK Ground for ECM Below 0.3 V Ignition switch turned ON. —
C01-31 — — — — —
C01-32 — — — — —
C01-33 — — — — — Terminal
No.Wire
colorCircuit Normal voltage Condition Remarks

Downloaded from www.Manualslib.com manuals search engine 1A-176 Engine General Information and Diagnosis:
C01-34 — — — — —
C01-35 — — — — —
C01-36 — — — — —
C01-37 — — — — —
C01-38 — — — — —
C01-39 — — — — —
C01-40 WHTThrottle position
sensor (sub) signal1.57 – 1.90 VIgnition switch turned ON
and accelerator pedal at
idle position after warmed
up engine.
—
3.88 – 4.45 V
(“Reference
waveform No.29: ”)Ignition switch turned ON
and accelerator pedal at
full depressed position
after warmed up engine.
C01-41 GRYGround for shield
wire of TP sensor
circuitBelow 0.3 V Ignition switch turned ON. —
C01-42 BLKGround for throttle
position sensorBelow 0.3 V Ignition switch turned ON. —
C01-43 REDOutput for 5 V
power source of
throttle position
sensor4.5 – 5.5 V Ignition switch turned ON. —
C01-44 YELOutput of throttle
actuator0 – 1 VIgnition switch turned ON
and accelerator pedal at
idle position after warmed
up engine. Output signal is pulse.
Duty ratio varies
depending on throttle
valve and accelerator
pedal position. *0 – 1 V
↑↓
10 – 14 V
(“Reference
waveform No.26: ”
and “Reference
waveform No.27: ”)Ignition switch turned ON
and accelerator pedal at
full depressed position
after warmed up engine.
C01-45 BLUOutput of throttle
actuator0 – 1 VIgnition switch turned ON
and accelerator pedal at
full depressed position
after warmed up engine. Output signal is pulse.
Duty ratio varies
depending on throttle
valve and accelerator
pedal position. *0 – 1 V
↑↓
10 – 14 V
(“Reference
waveform No.26: ”
and “Reference
waveform No.27: ”)Ignition switch turned ON
and accelerator pedal at
idle position after warmed
up engine.
C01-46BLK/
REDHeater output of
heated oxygen
sensor-110 – 14 V Ignition switch turned ON. —
*0 – 2 V
↑↓
10 – 14 V
(“Reference
waveform No.8: ” and
“Reference waveform
No.9: ”)Engine running at idle
after warmed up engine.Output signal is active low
duty pulse. Duty ratio
varies depending on
engine condition.
C01-47RED/
BLUHeater output of
heated oxygen
sensor-2 (if
equipped)10 – 14 V Ignition switch turned ON.
— 0 – 1 V
(“Reference
waveform No.10: ”)Engine running at idle
after vehicle running over
30 km/h, 19 mph for 5 min. Terminal
No.Wire
colorCircuit Normal voltage Condition Remarks

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-177
C01-48YEL/
GRNStarting motor
signal0 – 1 V Ignition switch turned ON.
—
6 – 14 V While engine cranking.
C01-49 — — — — —
C01-50WHT/
BLUGround of ECM for
shield wireBelow 0.3 V Ignition switch turned ON. —
C01-51 — — — — —
C01-52 — — — — —
C01-53RED/
BLKManifold absolute
pressure (MAP)
sensor signal (if
equipped)Approx. 4 V
(“Reference
waveform No.17: ”)Ignition switch turned ON
with barometric pressure
at 100 kPa, 760 mmHg.
—
0.4 – 2.0 V
(“Reference
waveform No.18: ”)While engine running at
specified idle speed after
warmed up with
barometric pressure at
100 kPa, 760 mmHg.
C01c01-
54GRNThrottle position
sensor (main)
signal0.75 – 1.08 VIgnition switch turned ON
and accelerator pedal at
idle position after warmed
up engine.
—
3.67 – 4.24 V
(“Reference
waveform No.29: ”)Ignition switch turned ON
and accelerator pedal at
full depressed position
after warmed up engine.
C01-55GRY/
BLUGround for sensors Below 0.3 V Ignition switch turned ON. —
C01-56 REDKnock sensor
signal2 – 3 V
(“Reference
waveform No.19: ”
and “Reference
waveform No.20: ”)Ignition switch turned ON.
— Engine running at 4000 r/
min. after warmed up.
C01-57 ORN Ground for sensors Below 0.3 V Ignition switch turned ON. —
C01-58BLK/
ORNGround for ECM Below 0.3 V Ignition switch turned ON. —
C01-59GRN/
WHTOil control valve
ground (for engine
with VVT system)Below 1.3 V Ignition switch turned ON. —
C01-60GRN/
REDOil control valve
output (for engine
with VVT system)*0 – 0.6 V
↑↓
10 – 14 V
(“Reference
waveform No.21: ”
and “Reference
waveform No.22: ”)At the moment of ignition
switch turned ON.Output signal is active
high pulse. Duty ratio
varies depending on
vehicle condition. Terminal
No.Wire
colorCircuit Normal voltage Condition Remarks
Terminal
No.Wire
colorCircuit Normal voltage Condition Remarks
E01-1BLK/
REDMain power supply 10 – 14 V Ignition switch turned ON. —
E01-2WHT/
REDPower source for
ECM internal
memory10 – 14 V Ignition switch turned ON. —
E01-3 REDCAN (high)
communication line
(active high signal)
to ABS control
module*2.5 – 4.5 V
(“Reference
waveform No.23: ”)Ignition switch turned ON
with engine at stop.CAN communication line
signal is pulse. Pulse
signal displayed with a
regular frequency with
varies depending on
engine condition.

Downloaded from www.Manualslib.com manuals search engine 1A-178 Engine General Information and Diagnosis:
E01-4 BRNEngine revolution
signal output for P/
S control module0 – 0.8 VIgnition switch turned ON
with engine at stop.—
*0 – 1 V
↑↓
8 – 14 V
(“Reference
waveform No.24: ”
and “Reference
waveform No.25: ”)While engine running.Output signal is pulse.
Pulse frequency varies
depending on engine
speed.
(2 pulses are generated
per 1 crankshaft
revolution.)
(3000 r/min. = 100 Hz)
E01-5 — — — — —
E01-6 — — — — —
E01-7 — — — — —
E01-8 — — — — —
E01-9 — — — — —
E01-10 — — — — —
E01-11 — — — — —
E01-12 — — — — —
E01-13YEL/
REDClock signal for
immobilizer coil
antenna10 – 14 V Ignition switch turned ON. —
E01-14 — — — — —
E01-15GRN/
WHTFuel pump relay
output0 – 2.5 VFor 2 sec. from the time
ignition switch is turned
ON or while engine is
running.
—
10 – 14 VOn and after 2 sec. from
the time ignition switch is
turned ON or while engine
is at stop.
E01-16BLK/
REDMain power supply 10 – 14 V Ignition switch turned ON. —
E01-17 — — — — —
E01-18 WHTCAN (low)
communication line
(active low signal)
to ABS control
module*0.5 – 2.5 V
(“Reference
waveform No.23: ”)Ignition switch turned ON
with engine at stop.CAN communication line
signal is pulse. Pulse
signal displayed with a
regular frequency which
varies depending on
engine condition.
E01-19 BLU/
WHTElectric load signal
for heater blower
motor10 – 14 VIG switch: ON Blower
selector < 3rd position
(Manual A/C model)
— IG switch: ON Blower
selector < 2nd position
(Auto A/C model)
0 – 1 VIG switch: ON Blower
selector > 2nd position
E01-20GRN/
WHTBrake light switch
signal0 – 1 VIgnition switch turned ON,
stop lamp not lit up.
—
10 – 14 VIgnition switch turned ON,
stop lamp lit up.
E01-21 — — — — —
E01-22 — — — — —
E01-23 — — — — —
E01-24YEL/
REDFuel level sensor
signal0 – 6 VIgnition switch turned ON.
Voltage varies depends on
fuel level.—
E01-25 — — — — — Terminal
No.Wire
colorCircuit Normal voltage Condition Remarks

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