ecm diagram SUZUKI SWIFT 2008 2.G Service Owners Manual
Page 717 of 1496
Downloaded from www.Manualslib.com manuals search engine Automatic Transmission/Transaxle:  5A-73
DTC P1777: TCM Lost Communication with ECM (Reception Error)S7RS0B5104040
Wiring Diagram
Refer to “DTC P1774: CAN Communication Bus Off”
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure1) Connect scan tool to DLC  with ignition switch OFF.
2) Clear DTC.
3) Start engine and run it for 1 min. or more.
4) Check DTC.
DTC Troubleshooting
NOTE
Upon completion of inspection and repair work, perform “DTC Confirmation Procedure:” and confirm 
that the trouble has been corrected.
 
DTC detecting condition Trouble area
Reception error of communication data fo r ECM is detected more than specified 
time continuously. •ECM
•TCM
• CAN circuit
Step
Action YesNo
1 Was “A/T System Check” performed? Go to Step 2.Go to “A/T System 
Check”.
2 Control module connector check
1) Check connection of connectors of all control modules 
communicating by means of CAN.
2) Recheck DTC.
Is there DTC P1777? Go to Step 3.
Intermittent trouble. 
Check for intermittent 
referring to “Intermittent 
and Poor Connection 
Inspection in Section 
00”.
3 DTC check
1) Check ECM for DTC referring to “DTC Check in Section 
1A”.
Is there DTC P1674? Go to “DTC P1674: 
CAN Communication 
(Bus Off Error) in 
Section 1A”.
Check ECM power and 
ground circuit. If circuit 
is OK, CAN 
communication circuit 
between ECM and ABS 
hydraulic unit / control 
module is open circuit.
4 CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of all control modules 
communicating by means of CAN.
3) Check CAN communication circuit between control  modules for open, short and high resistance.
Is each CAN communication circuit in good condition? Check TCM power and 
ground circuit. If circuit 
is OK, substitute a 
known-good TCM and 
recheck.
Repair circuit.  
Page 718 of 1496
Downloaded from www.Manualslib.com manuals search engine 5A-74 Automatic Transmission/Transaxle: 
DTC P1778: TCM Lost Communication with BCM (Reception Error)S7RS0B5104041
Wiring Diagram
Refer to “DTC P1774: CAN Communication Bus Off”.
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
1) Connect scan tool to DLC  with ignition switch OFF.
2) Clear DTC.
3) Start engine and run it for 1 min. or more.
4) Check DTC.
DTC Troubleshooting
NOTE
Upon completion of inspection and repair work, perform “DTC Confirmation Procedure:” “DTC 
Confirmation Procedure” and confirm that the trouble has been corrected.
 
DTC detecting condition Trouble area
Reception error of communication data fo r BCM is detected more than specified 
time continuously. •ECM
•TCM
•BCM
• ABS control module
• CAN circuit
Step
Action YesNo
1 Was “A/T System Check” performed? Go to Step 2.Go to “A/T System 
Check”.
2 Control module connector check
1) Check connection of connectors of all control modules 
communicating by means by means of CAN.
2) Recheck DTC.
Is there DTC P1778? Go to Step 3.
Intermittent trouble. 
Check for intermittent 
referring to “Intermittent 
and Poor Connection 
Inspection in Section 
00”.
3 DTC check in BCM (bus off)
1) Check BCM for DTC referring to “DTC Check in Section 
10B”.
Is there DTC U1073? Go to “DTC U1073 (No. 
1073): Control Module 
Communication Bus Off 
in Section 10B”.
Go to Step 4.
4 DTC check in ABS control module
1) Check ABS control module for DTC referring to “DTC 
Check in Section 4E”.
Is there DTC U1100? Go to “DTC U1100: Lost 
Communication with 
ECM (Reception Error) 
in Section 4E”.
Go to Step 5.
5 DTC check in ECM
1) Check ECM for DTC referring to “DTC Check in Section 
1A”.
Is there DTC P1678? Check BCM power and 
ground circuit. If circuit 
is OK, substitute a 
known-good BCM and 
recheck.Go to Step 6.
6 CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of all control modules 
communicating by means of CAN.
3) Check CAN communication circuit between control  modules for open, short and high resistance.
Is each CAN communication circuit in good condition? Check TCM power and 
ground circuit. If circuit 
is OK, substitute a 
known-good TCM and 
recheck.
Repair circuit.  
Page 886 of 1496
Downloaded from www.Manualslib.com manuals search engine 6C-4 Power Assisted Steering System: 
Schematic and Routing Diagram
EPS System Wiring Circuit DiagramS7RS0B6302001
M
5V
BRNRED/
BLU
BLK
RED
WHT
BLU
GRN
BRN YEL
E52-11
E52-14E52-12
E23-4
E23-26
E23-25 E51-1
E51-2
E52-18
E53-5
E53-7
E52-6
E52-8
E53-2
E52-9
E52-16
E52-19
GRY
PPL/WHT
[A ]
[E ]
12 3
4 5 67
89
11
10
12 13
141516
17 18 19 20
1
2
[B ][C ]
1210 9 8 7654 3 21
16 15 14 13 12 11
26 25 24 2322 21 20 19 18 17
32 31 30 29 28 27
[D]
5V
PPL
E52-4
11
12
13 14
15
10
9
16
12V
5V
5V
12V
REDE52-20E53-6
E53-4
E53-1
7654321
5
REDRED/
BLKWHT
6WHTWHT/BLKWHTBLK
12V
12V
17BLK
GRY
 LT  GRN 
/BLK
E52-1
E52-5
E49-1
GRNGRNWHTBLK
WHY
G28-25G28-31
RED/BLK
18
3
4
4
7 8
4
4
1 2
4
E49-2BLK
I7RS0B630002-01
[A]: Connector “E52” (viewed from harness side) 4. Fuse 12. P/S motor
[B]: Connector “E49” (viewed from harness side ) 5. Left-front wheel speed sensor 13. Shield
[C]: Connector “E51” (viewed from harness side) 6 . Right-front wheel speed sensor 14. Torque sensor
[D]: Connector “G28” (viewed from harness side) 7. Combination meter 15. Torque sensor amplifier
[E]: Connector “E53” (viewed from harness side) 8. “EPS” warning  light16. To ECM, BCM, Air bag SDM and ABS control module assembly
1. Main fuse box 9. Date link connector (DLC) 17. ABS/ESP ® control module
2. Ignition switch 10. ECM18. Individual circuit fuse box No.1
3. Junction block assembly 11. P/S control module  
Page 895 of 1496
Downloaded from www.Manualslib.com manuals search engine Power Assisted Steering System:  6C-13
Serial Data Link Circuit CheckS7RS0B6304009
CAUTION! 
Be sure to perform “EPS System Check” before starting “Troubleshooting”.
 
Wiring DiagramVehicle pulls to one side 
during straight driving
Poor performance of torque sensor
Check torque sensor referring to “Torque 
Sensor and Its Circuit Inspection”.
Steering gear case assembly faulty Replace.
Poor recovery after turns Poor performance of torque sensor Check torque sensor referring to “Torque 
Sensor and Its Circuit Inspection”.
Steering column faulty Replace.
Abnormal noise P/S motor (built in steering gear case 
assembly) malfunction Replace steering gear case assembly.
No idle up P/S control module faulty Check P/S control module referring to 
“Inspection of P/S Control Module and Its 
Circuits”.
Condition Possible cause Correction / Reference Item
MBLK
RED
E52-11 E51-1
E51-2PPL/WHT
[A ]
12
3
4 5 67
89
11
10
12 13
141516
17 18 19 2010 9 8 7654 3 21
16 15 14 13 12 11
26 25 24 2322 21 20 19 18 17
32 31 30 29 28 27
[C]
8
79
12V
[B ]
11
12
GRY
 LT  GRN 
/BLK
E52-1
E52-5
E49-1
GRNGRNWHTBLK
WHY
G28-25G28-31
RED/BLK
10
3
4
4
5 6
4
4
1 2
4
E49-2BLK
I7RS0B630003-01
[A]: Connector “E52” (viewed from harness side) 3. Junction block assembly 8. P/S control module
[B]: Connector “E49” (viewed from harness side) 4. Fuse 9. T o ECM, BCM, Air bag SDM control module and ABS control 
module assembly
[C]: Connector “G28” (viewed from harness side) 5. Comb ination meter 10. Individual circuit fuse box No.1
1. Main fuse box 6. “EPS” warning light 11. Serial data circuit
2. Ignition switch 7. Date link connector (DLC)  
Page 908 of 1496
Downloaded from www.Manualslib.com manuals search engine 6C-26 Power Assisted Steering System: 
DTC C1121 / C1123 / C1124: VSS Circuit FailureS7RS0B6304017
DTC C1121: No Vehicle Speed Signal (60 Seconds or More)
DTC C1123: No Vehicle Speed Signal (30 Seconds or More)
DTC C1124: Vehicle Speed Performance (Impossible Deceleration)
Wiring Diagram
DTC Detecting Condition and Trouble Area
M
BRNRED/
BLU
BLK
RED
E52-14
E52-12
E23-4
E23-26
E23-25 E51-1
E51-2
[A ]
12
3
4 5 67
89
11
10
12 13
141516
17 18 19 20
5V
PPL
E52-4
8
5
12V
E49-2BLK
12V
12V
6REDRED/ BLKWHT
7WHTWHT/BLKWHTBLK BLK
111
2
[B ]
9
 LT  GRN 
/BLKE52-1 E49-1
GRNGRNWHTBLK
WHY
10
3
4
4
4
4
1 2
12
I7RS0B630009-01
[A]: Connector “E52” (viewed from harness side)
4. Fuse9. ABS/ESP® control module
[B]: Connector “E49” (viewed from harness si de)5. ECM 10. Individual circuit fuse box No.1
1. Main fuse box 6. Left-front wheel speed sensor11. Vehicle speed signal circuit
2. Ignition switch 7. Right-front wheel speed sensor 12. Engine speed signal circuit
3. Junction block assembly 8. P/S control module
DTC detecting condition Trouble area
DTC C1121:
Vehicle speed signal is 0 km/h even though engine speed 
is more than 4000 rpm for more than 60 seconds 
continuously (before elapse of 5 min from engine start) or 
vehicle speed signal is 0 km/h even though engine speed 
is more than 2500 rpm for more than 60 seconds 
continuously (after elapse of 5 min for engine start).
(1 driving cycle detection logic but MIL does not light up)
DTC C1123:
Vehicle speed signal is 0 km/h with continuously more 
than 3 driving cycles even though engine speed is more 
than 4000 rpm for more than 30 seconds continuously 
(before elapse of 5 min from engine start) or vehicle speed 
signal is 0 km/h with continuously more than 3 driving 
cycles even though engine speed is more than 2500 rpm 
for more than 30 seconds continuously (after elapse of 5 
min for engine start).
(3 driving cycle detection logic)
DTC C1124:
Vehicle speed signal is less than 5 km/h for more than 5 
seconds continuously with more than specified 
deceleration speed (–20 m/s
2) from over 20 km/h.
(1 driving cycle detection logic but MIL does not light up) • Vehicle speed signal circuit
• Wheel speed sensor
•ECM
• P/S control module
• ABS/ESP®
 control module
• CAN communication circuit  
Page 910 of 1496
Downloaded from www.Manualslib.com manuals search engine 6C-28 Power Assisted Steering System: 
DTC C1122: Engine Speed SignalS7RS0B6304018
NOTE
DTC C1122 (engine speed signal failure) is indicated when ignition switch is at ON position and engine 
is not running, but means there is nothing abnormal if indication changes to a normal one when 
engine is started.
 
Wiring Diagram
Refer to “DTC C1121 / C1123  / C1124: VSS Circuit Failure”.
DTC Detecting Condition and Trouble Area DTC detecting condition Trouble area
Engine speed signal is less than 220 rpm for more than 
0.8 seconds.
or
Engine speed signal is less than 220 rpm for more than 20 
seconds continuously even though vehicle speed signal is 
more than 50 km/h.
(1 driving cycle detection logic) • Engine speed signal circuit
•ECM
• P/S control module
• Vehicle speed signal circuit  
Page 933 of 1496
Downloaded from www.Manualslib.com manuals search engine Table of Contents 7- i
7
Section 7
CONTENTS
HVAC
Precautions ................................................. 7-1
Precautions............................................................. 7-1
Precautions on HVAC ........................................... 7-1
Heater and Ventilation.... ......................... 7A-1
General Description ............................................. 7A-1
Heater and Ventilation Construction ................... 7A-1
Schematic and Routing Diagram ........................ 7A-2 Heater and Ventilation Wiring Circuit Diagram .... 7A-2
Diagnostic Information and Procedures ............ 7A-3 Heater and Ventilation Symptom Diagnosis........ 7A-3
Repair Instructions .............................................. 7A-4 HVAC Unit Components ..................................... 7A-4
HVAC Unit Removal and Installation .................. 7A-4
Blower Motor Removal and Installation............... 7A-4
Blower Motor Inspection ..................................... 7A-4
Blower Motor Resistor Removal and Installation ......................................................... 7A-5
Blower Motor Resistor Inspection ....................... 7A-5
Blower Motor Relay Inspection ........................... 7A-6
HVAC Control Unit Components ......................... 7A-6
HVAC Control Unit Remova l and Installation ...... 7A-7
Blower Speed Selector In spection ...................... 7A-9
Air Intake Selector Inspec tion ............................. 7A-9
Air Intake Control Actuator Removal and  Installation ......................................................... 7A-9
Air Intake Control Actuator Inspection .............. 7A-10
Center Ventilation Louver Removal and  Installation ....................................................... 7A-10
Side Ventilation Louver Removal and  Installation ....................................................... 7A-11
HVAC Air Filter Removal and Installation (If  Equipped)........................................................ 7A-12
HVAC Air Filter Inspection  (If Equipped) ........... 7A-12
Air Conditioning System... ...................... 7B-1
Manual Type ............................................................ 7B-1
Precautions........................................................... 7B-1A/C System Caution ............................................ 7B-1
Precautions on Servicing A/C System ................ 7B-1
General Description ............................................. 7B-3 Refrigerant Type Identifica tion ............................ 7B-3
Sub-Cool A/C System Description ...................... 7B-4
A/C Operation Description .................................. 7B-4 Schematic and Routing Diagram ........................7B-5
Major Components of A/C System ...................... 7B-5
A/C System Wiring Diagram ............................... 7B-6
Diagnostic Information and Procedures ............7B-7 A/C System Symptom Diagnosis ........................ 7B-7
Abnormal Noise Sympto m Diagnosis of A/C 
System .............................................................. 7B-9
A/C System Performance Inspection ................ 7B-10
A/C System Inspection at ECM ......................... 7B-15
Repair Instructions ........... .................................7B-16
Operation Procedure for Re frigerant Charge .... 7B-16
Condenser Assembly On-Vehicle Inspection .... 7B-21
Condenser Assembly Removal and  Installation ....................................................... 7B-21
Receiver/Dryer Removal and Installation .......... 7B-22
HVAC Unit Components ................................... 7B-23
HVAC Unit Removal and In stallation ................ 7B-24
Evaporator Inspection ....................................... 7B-24
Evaporator Thermistor (Evaporator  Temperature Sensor) Removal and 
Installation ....................................................... 7B-25
Evaporator Thermistor (Evaporator  Temperature Sensor) Inspec tion..................... 7B-25
Expansion Valve Removal and Installation ....... 7B-26
Expansion Valve Inspection .............................. 7B-26
A/C Refrigerant Pressure Sensor and Its  Circuit Inspection............................................. 7B-26
A/C Refrigerant Pressu re Sensor Removal 
and Installation ................................................ 7B-26
A/C Switch Inspection ....................................... 7B-27
Compressor Relay Inspection ........................... 7B-27
Compressor Drive Belt Inspection and  Adjustment ...................................................... 7B-27
Compressor Drive Belt Removal and  Installation ....................................................... 7B-28
Compressor Assembly Removal and  Installation ....................................................... 7B-28
Compressor Assembly Components................. 7B-29
Magnet Clutch Inspection.................................. 7B-29
Magnet Clutch Removal and Installation........... 7B-29
Relief Valve Inspection...................................... 7B-31
Relief Valve Removal and Installation............... 7B-32
Specifications .................... .................................7B-32
Tightening Torque Specifications ...................... 7B-32
Special Tools and Equipmen t ...........................7B-33  
Page 934 of 1496
Downloaded from www.Manualslib.com manuals search engine 7-ii Table of Contents
Recommended Service Material ....................... 7B-33
Special Tool ...................................................... 7B-33
Automatic Type .................... .................................7B-34
Precautions.........................................................7B-34 A/C System Caution .......................................... 7B-34
Precautions in Diagnosing Trouble ................... 7B-34
Precautions on Servicing A/C System .............. 7B-34
General Description .......... .................................7B-34
Auto A/C System Descript ion ............................ 7B-34
HVAC Control Module Operation Description ... 7B-36
Refrigerant Type Identifica tion .......................... 7B-36
Sub-Cool A/C System Description .................... 7B-36
A/C Operation Description ................................ 7B-36
On-Board Diagnostic System Description ......... 7B-37
Schematic and Routing Diagram ......................7B-37 Major Components of A/C System .................... 7B-37
A/C System Wiring Diagra m ............................. 7B-38
Diagnostic Information and Procedures ..........7B-39 A/C System Symptom Diagnosis ...................... 7B-39
Abnormal Noise Sympto m Diagnosis of A/C 
System ............................................................ 7B-42
DTC Check........................................................ 7B-42
DTC Clearance ................................................. 7B-43
DTC Table ......................................................... 7B-44
Fail-Safe Table ................. ................................. 7B-45
Scan Tool Data ................................................. 7B-46
Air Conditioning System Check......................... 7B-47
Visual Inspection ............................................... 7B-49
DTC B1502: Inside Air Temperature Sensor  and/or Its Circuit Malfunction .......................... 7B-49
DTC B1503: A/C Evaporator Air Temperature  Sensor and/or Its Circuit Malfunction .............. 7B-50
DTC B1504: Sunload Sensor and/or Its  Circuit Malfunction ......... ................................. 7B-52
DTC B1511: Temperature Control Actuator  (Position Sensor) and/or Its Circuit 
Malfunction ...................................................... 7B-53
DTC B1512: Air flow Control Actuator  (Position Sensor) and/or Its Circuit 
Malfunction ...................................................... 7B-55
DTC B1513: Temperature Control Actuator  and/or Its Circuit Malfunction .......................... 7B-57
DTC B1514: Air Flow Co ntrol Actuator and/or 
Its Circuit Malfunction ...................................... 7B-60
DTC B1541: HVAC Control Module Back-Up  Power Supply Malfunction .............................. 7B-62
DTC B1546: A/C Refrigerant Pressure  Malfunction ...................................................... 7B-63
DTC B1551: Serial Communication Circuit  Malfunction ...................................................... 7B-63
DTC B1552: Serial Communication Signal  Malfunction ...................................................... 7B-64
DTC B1553: CAN Communication Signal  Malfunction ...................................................... 7B-65
DTC B1557: Vehicle Speed Sensor Signal  Malfunction ...................................................... 7B-65
DTC B1561: Engine Coolant Temperature  Sensor Signal Malfunctio n .............................. 7B-66 DTC B1562: Outside Air Temperature Sensor 
Signal Malfunction ........................................... 7B-66
DTC B1563: A/C Refr igerant Pressure 
Sensor Signal Malfunction .............................. 7B-66
Inspection of HVAC Control Module and Its  Circuit .............................................................. 7B-67
A/C System Performance Inspection ................ 7B-70
A/C System Inspection at ECM ......................... 7B-70
Repair Instructions ............ ................................7B-71
Operation Procedure for Refrigerant Charge .... 7B-71
HVAC Unit Components ................................... 7B-72
HVAC Unit Removal and In stallation ................ 7B-73
Temperature Control Actuator Removal and  Installation ....................................................... 7B-73
Temperature Control Actuat or Inspection ......... 7B-73
Air Flow Control Actuator Removal and  Installation ....................................................... 7B-74
Air Flow Control Actuator Inspection ................. 7B-74
Air Intake Control Actuator Removal and  Installation ....................................................... 7B-75
Air Intake Control Actuator Inspection............... 7B-75
Actuator Linkage Inspection .............................. 7B-76
Blower Motor Controller Removal and  Installation ....................................................... 7B-76
Blower Motor Controller Inspection ................... 7B-76
HVAC Control Module Removal and  Installation ....................................................... 7B-77
Sunload Sensor Removal and Installation ........ 7B-77
Sunload Sensor Inspection ............................... 7B-77
Outside Air Temperature Sensor Removal  and Installation ................................................ 7B-77
Outside Air Temperature Sensor Inspection ..... 7B-77
Inside Air Temperature Sensor Removal and  Installation ....................................................... 7B-78
Inside Air Temperature Sens or Inspection ........ 7B-78
Condenser Assembly On-Vehicle Inspection .... 7B-78
Condenser Assembly Removal and  Installation ....................................................... 7B-78
Receiver/Dryer Removal and Installation .......... 7B-78
Evaporator Inspection ....................................... 7B-78
Evaporator Temperature Sensor Removal  and Installation ................................................ 7B-78
Evaporator Temperature Se nsor Inspection ..... 7B-78
Expansion Valve Removal an d Installation ....... 7B-78
Expansion Valve Inspection .............................. 7B-78
A/C Refrigerant Pressure Sensor and Its  Circuit Inspection............................................. 7B-78
A/C Refrigerant Pressu re Sensor Removal 
and Installation ................................................ 7B-78
Compressor Relay Inspection .
 .......................... 7B-78
Compressor Drive Belt Inspection and  Adjustment ...................................................... 7B-78
Compressor Drive Belt Removal and  Installation ....................................................... 7B-79
Compressor Assembly Removal and  Installation ....................................................... 7B-79
Compressor Assembly Components................. 7B-79
Magnet Clutch Removal and Installation........... 7B-79
Magnet Clutch Inspection.................................. 7B-79
Relief Valve Inspection...................................... 7B-79  
Page 938 of 1496
Downloaded from www.Manualslib.com manuals search engine 7A-2 Heater and Ventilation: 
Schematic and Routing Diagram
Heater and Ventilation Wiring Circuit DiagramS7RS0B7102001
2. Ventilator duct 6. Foot air 10. Recirculation air 14. Resistance board
3. Defroster nozzle 7. Front defroster air 11. Center ventilation air 15. Rear duct (if equipped)
4. Heater core 8. Side defroster air 12. Air intake door
BLK
RED/BLK
3
5
7
BLK
2
M
12V
BLU/WHTE23-19
G18-3
G18-4
G18-7
G18-8
G18-10
G18-13
G19-2
G19-3
G19-7
G19-6
G19-1
G18-9
G18-14
BLK/WHT
YEL
BLU/WHT
RED
RED/BLK
RED
GRN
BRN
BLK/RED
RED/YEL
BLK
BLK/YEL
BLK/ORN
4
6
10
8
9
M1
12
11 13
14
15
I4RS0B710002-01
1. Ignition switch 5. Blower motor relay 9. ECM 13. Blower speed selector
2. Blower motor 6. Blower motor resistor 10. Air intake control actuator 14. Air intake selector
3. HVAC control unit 7. Junction block assembly 11. Ind ividual circuit fuse box No.1 15. Rear defogger switch
4. Lighting switch 8. BCM 12. Main fuse box  
Page 954 of 1496
Downloaded from www.Manualslib.com manuals search engine 7B-6 Air Conditioning System: Manual Type
A/C System Wiring DiagramS7RS0B7212002
BLK/REDBLK/RED
BLK/YELBLK/YEL
BLK/YEL
BRN/WHT
12V5V
5V 5V
5V11 
E23-1  
E23-60  
BLK/REDBLK/REDE23-16  
E23-57WHT/BLK
9
13
E23-55C37-14GRY/REDRED
BLK
ORN
E23-47  GRY
WHTBLU/YEL
RED/BLK
14 3
1
15
5
7
BLK
2
M
12VBLU/WHTE23-19
C37-24
C37-55ORN
5V
LT GRN16
G18-3
G18-4
G18-7
G18-8
G18-10
G18-13
G18-5
G18-6
G19-5
G19-2
G19-3
G19-7
G19-6
G19-1
G18-9
G18-14
BLK/WHT
YEL
BLU/WHT
RED
BRN/WHT
GRN/WHT
RED/BLK
RED
GRN
BRN
BLK/RED
RED/YEL
BLK
BLK/YEL
BLK/ORN
4
6
12
10
M
E23-54
REDWHTE23-3E23-18
17 18
LT GRNE23-46  
L+
L–
H–
H
+
BLU/RED
BLK
BLU/WHTBLK
BLU/BLK
20
GRN
GRY
E23-48  
19
21
22
BLU/REDC37-58  
C37-15  C37-30  
BLK/ORN
BLKBLKE23-31  BLK
BLU
YEL
GRN
WHT
23
24
26 25
28
27
8
29
I7RS0B721001-01
1. Ignition switch
9. A/C refrigerant pressure sensor 17. I ndividual circuit fuse box (No.1) 25. Air intake selector
2. Blower motor 10. ECM 18. Main fuse box 26. Rear defogger switch
3. HVAC control unit 11. Main relay 19. Radiator cooling fan relay No.1 27. Rear defogger
4. Lighting switch 12. Air intake control actuator 20. Radiator cooling fan relay No.2 28. Rear defogger relay
5. Blower motor relay 13. Compressor relay 21. Radiator cooling fan relay No.3 29. ABS / ESP ® control module
6. Blower motor resistor 14. Compressor 22. Radiator cooling fan motor
7. Junction block assembly 15. Evaporator thermistor  (evaporator temperature sensor)23. Blower speed selector
8. BCM 16. ECT sensor 24. A/C switch