2006 SUZUKI SWIFT ECM power

Downloaded from www.Manualslib.com manuals search engine 1A-132 Engine General Information and Diagnosis:
DTC P0533: A/C Refrigerant Pressure Sensor “A” Circuit HighS7RS0B1104053
Wiring Diagram
Refer to “DTC P0532: A/C Refrigerant Pressure Sensor “A” Circuit Low”.
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Check DTC.
DTC Troubleshooting
NOTE
• When measuring circuit voltage, resistance and/ or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors re ferring to “Inspection of ECM and Its Circuits”.
• Upon completion of inspection and repair work, perform “DTC Confirmation Procedure” and confirm that the trouble has been corrected.

7 A/C refrigerant pressure sensor check
1) Check A/C refrigerant pressure sensor referring to “A/C
Refrigerant Pressure Sensor and Its Circuit Inspection in
Section 7B” or “A/C Refrigerant Pressure Sensor and Its
Circuit Inspection in Section 7B”.
Is it in good condition? Substitute a known-
good ECM and recheck.
Faulty A/C refrigerant
pressure sensor.
Step Action Yes No
DTC detecting condition
Trouble area
A/C refrigerant pressure sensor signal voltage is higher
than 4.93 V for 0.5 sec. continuously.
(1 driving detection logic but MIL does not light up) • A/C refrigerant pressure sensor circuit
• A/C refrigerant pressure sensor
• MAP sensor
•ECM
Step
Action YesNo
1 Was “Engine and Emission Control System Check”
performed? Go to Step 2.
Go to “Engine and
Emission Control
System Check”.
2 A/C refrigerant pressure sensor power supply circuit
check
1) Disconnect connector from A/C refrigerant pressure
sensor with ignition switch turned OFF.
2) Check for proper connection of A/C refrigerant pressure sensor at “GRY/RED”, “RED ” and “ORN” wire terminals.
3) Turn ON ignition switch, measure voltage between engine ground and “GRY/RED” wire terminal of A/C
refrigerant pressure sensor connector.
Is voltage 4 – 6 V? Go to Step 4.
Go to Step 3.

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-133
3A/C refrigerant pressure sensor power supply circuit
check
1) Disconnect connectors from MAP sensor with ignition
switch turned OFF.
2) Turn ON ignition switch, measure voltage between engine ground and “GRY/RED” wire terminal of A/C
refrigerant pressure sensor connector.
Is voltage 4 – 6 V? Faulty MAP sensor. “GRY/RED” wire is open
or shorted to power
circuit.
4 A/C refrigerant pressure sensor signal circuit check
1) Turn ON ignition switch, measure voltage between
engine ground and “RED” wire terminal of A/C
refrigerant pressure sensor connector.
Is voltage 4 – 6 V? Go to Step 6.
Go to Step 5.
5 A/C refrigerant pressure sensor signal circuit check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Measure resistance between “RED” wire terminal of A/C refrigerant pressure sensor connector and “E23-55”
terminal of ECM connector.
Is resistance below 2
Ω? “RED” wire is shorted to
power supply circuit.
“RED” wire is open or
high resistance circuit.
6 A/C refrigerant pressure sensor ground circuit check
1) Turn OFF ignition switch, measure resistance between
engine ground and “ORN” wire terminal of A/C
refrigerant pressure sensor connector.
Is resistance below 5
Ω? Go to Step 8.
Go to Step 7.
7 ECM ground circuit check
1) Remove ECM from its br acket with ECM connectors
connected.
2) Measure resistance between engine ground and “E23- 54” terminal of ECM connector.
Is resistance below 5
Ω? “ORN” wire is open or
high resistance circuit.
ECM grounds “E23-31”,
“C37-58”, “C37-15” and/
or “C37-30” is open or
high resistance circuit.
8 A/C refrigerant pressure sensor check
1) Check A/C refrigerant pressure sensor referring to “A/C
Refrigerant Pressure Sensor and Its Circuit Inspection in
Section 7B” or “A/C Refrigerant Pressure Sensor and Its
Circuit Inspection in Section 7B”.
Is it good condition? Substitute a known-
good ECM and recheck.
Faulty A/C refrigerant
pressure sensor.
Step Action Yes No

Downloaded from www.Manualslib.com manuals search engine 1A-134 Engine General Information and Diagnosis:
DTC P0601 / P0602 / P0607: Internal Control Module Memory Check Sum Error / Control Module
Programming Error / Control Module Performance
S7RS0B1104054
System Description
Internal control module is installed in ECM.
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure 1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch and clear DTC by using scan tool.
3) Start engine and run it at idle if possible.
4) Check DTC.
DTC Troubleshooting
NOTE
• When measuring circuit voltage, resistance and/ or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors re ferring to “Inspection of ECM and Its Circuits”.
• Upon completion of inspection and repair work, perform “DTC Confirmation Procedure” and confirm that the trouble has been corrected.

DTC detecting condition Trouble area
DTC P0601:
Data write error or check sum error
(1 driving cycle detection logic)
DTC P0602:
Data programming error
(1 driving cycle detection logic but MIL does not light up)
DTC P0607:
ECM internal processor error
(1 driving cycle detection logic) • ECM power supply circuit and/or
ground circuit
•ECM
Step Action YesNo
1 DTC recheck
1) Clear DTC referring to “DTC Clearance”.
2) Turn OFF ignition switch.
3) Turn ON ignition switch and check DTC.
Is DTC P0601 or P0 607 still indicated? Go to Step 2.
Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.
2 ECM reprogramming check
Was reprogramming of ECM executed? Execute reprogramming
of ECM correctly once
again.Go to step 3.
3 ECM power and ground circuit check
1) Check that ECM power supply circuit and ECM ground
circuit is in good condition referring to “ECM Power and
Ground Circuit Check”.
Are check results OK? Substitute a known-
good ECM and recheck.
Repair ECM power or
ground circuit.

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-137
DTC P0620: Generator Control CircuitS7RS0B1104057
System and Wiring Diagram
Generator Control System Description
Refer to “Generator Control System Description”.3
Wire circuit check
1) Disconnect starting motor control relay in individual
circuit fuse box No.1 with ignition switch turned OFF.
2) Check for proper connection to starting motor control relay at “RED/WHT”, “RED”, “WHT”, “YEL” (for A/T
model) and “YEL/GRN” (for M/T model) wire terminals.
3) Disconnect connector from starting motor.
4) Measure voltage between “C37-48” terminal of ECM connector and vehicle body ground with ignition switch
turned ON.
Is voltage 0 – 1 V? Go to Step 4. For A/T model, “YEL” or
“YEL/GRN” wire is
shorted to power circuit.
For M/T model, “YEL/
GRN” wire is shorted to
power circuit.
If wires are OK,
substitute a known good
ECM and recheck.
4 Wire circuit check
1) Measure voltage between “RED/WHT” wire terminal of
starting motor control relay connector and vehicle body
ground with ignition switch turned ON.
Is voltage 0 – 1 V? Check starting motor
control relay. If OK,
substitute a known-
good ECM and recheck.
Faulty ignition switch,
check ignition switch
referring to “Ignition
Switch Inspection in
Section 9C”.
If ignition switch is OK,
check for short circuit
between ignition switch
and starting motor
control relay to power
circuit.
Step Action Yes No
IG
L
C
FR
E 4
2
BRN/BLKC37-8
BLU/YELC37-28
B
E23
C37
34
1819
567
1011
17
20
47 46
495051
2122
52 16
25 9
24
14
29
55
57 54 53
59
60 58 2
262728
15
30
56 4832 31
34353637
40
42 39 38
44
45 43 41 331
1213
238
34
1819
567
1011
17
20
47 46
495051
2122
52 16
25 9
24
14
29
55
57 54 53
59
60 58 2
262728
15
30
56 4832 31
34353637
40
42 39 38
44
45 43 41 331
1213
238 1
3 5
I5RS0C110013-01
1. Generator
3. Field coil 5. Ignition switch
2. IC regulator 4. ECM 6. Charge lamp

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-139
DTC P0625 / P0626: Generator Field Terminal Circuit Low / HighS7RS0B1104058
System and Wiring Diagram
Refer to “DTC P0620: Generator Control Circuit”.
Generator Control System Description
Refer to “Generator Control System Description”.
DTC Detecting Condition and Trouble Area 3
Generator control circuit check
1) Disconnect connector from generator and ECM with
ignition switch turned OFF.
2) Check for proper connection of wire terminal to generator connector and to ECM connector.
3) If connections are OK, check generator control circuit for
the following.
• Resistance of generator control circuit wire between generator connector and ECM connector is less than
1 Ω (continuity check)
• Resistance between generator control circuit wire of
generator connector and vehicle body ground is
infinity (ground circuit short check)
• Voltage between generator control circuit wire of generator connector and vehicle body ground is 0 V
with ignition switch tuned ON (power circuit short
check)
Are they in good condition? Go to Step 3. Repair or replace
defective wire.
4 Generator check
1) Check for generator output referring to “Generator Test
(Undercharged Battery Check) in Section 1J”.
Is check result satisfactory? Go to Step 4. Repair or replace
generator.
5 Electric load current sensor check
1) Check for electric load current sensor output referring to
“Electric Load Current Sensor On-Vehicle Inspection in
Section 1C”.
Is check result satisfactory? Substitute a known-
good ECM and recheck.
Replace electric load
current sensor.
Step Action Yes No
DTC detecting condition
Trouble area
P0625:
Generator field coil duty is 0% (high voltage) for more than
specified time even through generator control is minimum
regulation (control duty 0%).
(1 driving cycle detection logic but MIL does not light up)
P0626:
Generator field coil duty is 100% (low voltage) for more than
specified time even through ge nerator control is maximum
regulation (control duty 100%) or Generator field coil duty is 100%
(low voltage) when engine is starting.
(1 driving cycle detection logic but MIL does not light up) • Generator and/or its circuit
•ECM

Downloaded from www.Manualslib.com manuals search engine 1A-140 Engine General Information and Diagnosis:
DTC Confirmation Procedure1) With ignition switch turned OFF, connect scan tool to DLC.
2) Turn ON ignition switch and clear DTC.
3) Make sure that all accessory switch is tuned OFF.
4) Start engine and warm it up to normal operating temperature (ECT approx. 90 – 95 °C, 193 – 203 °F).
5) Turn ON following accessory switch. • Head lights switch.
• Blower motor switch (max position).
• Rear defogger switch.
6) Increase engine speed to 4000 rpm and keep it for 10 sec. or more.
7) Decrease engine speed to idle.
8) Check DTC.
DTC Troubleshooting
NOTE
• When measuring circuit voltage, resistance and/ or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors re ferring to “Inspection of ECM and Its Circuits”.
• Upon completion of inspection and repair work, perform “DTC Confirmation Procedure” and confirm that the trouble has been corrected.

Step Action YesNo
1 Was “Engine and Emission Control System Check”
performed? Go to Step 2.
Go to “Engine and
Emission Control
System Check”.
2 Generator control circuit check
1) Disconnect connector from generator and ECM with
ignition switch turned OFF.
2) Check for proper connection of wire terminal to generator connector and to ECM connector.
3) If connections are OK, check generator control (generator “C” terminal) circuit and field coil monitor
(generator “FR” terminal) circuit for the following.
• Resistance of each generato r control wire and field
coil monitor wire between generator connector and
ECM connector is less than 1 Ω (continuity check)
• Resistance between generator control wire and field coil monitor wire of generator connector is infinity
(insulation check)
• Resistance between each generator control wire and field coil monitor wire of generator connector and
vehicle body ground is infinity (ground circuit short
check)
• Voltage between each generator control wire and field
coil monitor wire of generator connector and vehicle
body ground is 0 V with ignition switch tuned ON
(power circuit short check)
Are they in good condition? Go to Step 3.
Repair or replace
defective wire.
3 Generator check
1) Check for generator output referring to “Generator Test
(Undercharged Battery Check) in Section 1J” and
“Generator Inspection in Section 1J”.
Is check result satisfactory? Substitute a known
good ECM and recheck.
Repair or replace
generator.

Downloaded from www.Manualslib.com manuals search engine 1A-142 Engine General Information and Diagnosis:
DTC Troubleshooting
NOTE
• When measuring circuit voltage, resistance and/or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors re ferring to “Inspection of ECM and Its Circuits”.
• Upon completion of inspection and repair work, perform “DTC Confirmation Procedure” and confirm that the trouble has been corrected.

Step Action YesNo
1 Was “Engine and Emission Control System Check”
performed? Go to Step 2.
Go to “Engine and
Emission Control
System Check”.
2 Electric load current sensor power and ground circuit
check
1) Disconnect connector from electric load current sensor.
2) Check electric load current sensor circuit for the
following.
• Voltage between “BLK/WHT” wire terminal of electric load current sensor conn ector and vehicle body
ground is 10 – 14 V with ignition switch turned ON
• Resistance between “BLK /ORN” wire terminal of
electric load current sensor connector and vehicle
body ground is less than 2 Ω
Are they in good condition? Go to Step 3.
Repair or replace
defective wire.
3 Electric load current sensor output circuit check
1) Disconnect connectors from ECM.
2) Check electric load current sensor circuit for the
following.
• Resistance between “PNK/BLU” wire terminal of electric load current sensor connector and “C37-23”
terminal of ECM connector is less than 2 Ω
• Resistance between “PNK/BLU” wire terminal of electric load current sensor connector and vehicle
body ground is infinity
• Voltage between “PNK/BLU” wire terminal of electric load current sensor conn ector and vehicle body
ground is 0 V with ignition switch turned ON
Are they in good condition? Go to Step 4.
Repair or replace
defective wire.
4 Electric load current sensor check
1) Check for electric load current sensor output referring to
“Electric Load Current Sensor On-Vehicle Inspection in
Section 1C”.
Is check result satisfactory? Substitute a known-
good ECM and recheck.
Faulty electric load
current sensor.

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-143
DTC P1510: ECM Back-Up Power Supply MalfunctionS7RS0B1104060
Wiring Diagram
Circuit Description
Battery voltage is supplied so that DTC memory, values for engine control learned by ECM, etc. are kept in ECM even
when the ignition switch is turned OFF.
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch and clear DTC using scan tool and run engine at idle speed for 1 min.
3) Check DTC.
E23 C37
34
1819
567
1011
17
20
47 46
495051
2122
52 16
25 9
24
14
29
55
57 54 53
59
60 58 2
262728
15
30
56 4832 31
34353637
40
42 39 38
44
45 43 41 331
1213
238
34
1819
567
1011
17
20
47 46
495051
2122
52 16
25 9
24
14
29
55
57 54 53
59
60 58 2
262728
15
30
56 4832 31
34353637
40
42 39 38
44
45 43 41 331
1213
238
WHT/REDWHT80A
50A
3
2 1
E23-2
I4RS0A110051-01
1. ECM
2. “RADIO” fuse 3. Main fuse box
DTC detecting condition Trouble area
Back-up power circuit voltage is less than 70% battery voltage for
5 seconds continuously while engine is running.
(1 driving cycle detection logic) Battery voltage supply circuit