Suzuki Grand Vitara JB419. Service manual — part 122
Table of Contents 7-iii
HVAC Control Module Removal and
Installation. . . . . . . . . . . . . . ..7B-*
A/C Compressor Drive Belt Inspection. . . .. 7B-24
A/C Compressor Drive Belt Removal and
Installation. . . . . . . . . . . . . ...7B-24
A/C Compressor Relay Inspection. . . . . 7B-25
Compressor Assembly On-Vehicle Inspection ..7B-25
Compressor Assembly and Compressor
Bracket Components . . . . . . . . . ..7B-26
Compressor Assembly Removal and
Installation. . . . . . . . . . . . . ...7B-26
Magnet Clutch Components. . . . . . . ..7B-27
Magnet Clutch Operating Check . . . . . ...7B-27
Magnet Clutch Removal and Installation. . ...7B-28
Relief Valve On-Vehicle Inspection. . . . ...7B-30
Specifications. . . . . . . . . . . . . .7B-79
Tightening Torque Specifications. . . . . ..7B-30
Special Tools and Equipment . . . . . . ...7B-31
Recommended Service Material . . . . . ...7B-31
Special Tool . . . . . . . . . . . . . ..7B-31
7A-1 Heater and Ventilation:
HVAC
Heater and Ventilation
General Description
Additional Heater System Description
S5JB0B7101005
This system, consisting of ECM, additional heater
assembly and 3 relays, warms up the engine coolant
which flows through the heater core while the engine is
warmed up, thereby promoting interior heating. It is not
activated during pre/post heating by glow plug. Not
during pre/post heating by glow plug, it is activated on
the following conditions.
• Ten seconds have passed after the engine start.
• The battery voltage is more than 12.2 V.
• The engine speed is more than 700 rpm.
• The engine coolant and the intake air temperature is
as shown in the graph below.
Schematic and Routing Diagram
Electronic Control Input / Output Diagram (for Vehicle without A/C)
S5JB0B7102002
[A]: Engine coolant temperature (
°C)
[C]: ON
[B]: Intake air temperature (
°C)
[D]: OFF
0
0
5
10
10
-10
20
30
40
50
60
70
75
15
25
20
[B]
[A]
[C]
[D]
I5JB0B710001-03
Temperature selector
MODE (air flow) selector
Blower speed selector
Air intake selector
Wheel
speed
sensor
Blower motor controller
Temperature control actuator
Air flow control actuator
Air intake control actuator
BCM
ABS control module or
ESP
®
control module
Data link connector
HVAC control module
CPU
ECT sensor
ECM
CMP sensor
*
*
Additional heater relay
I5JB0B710002-02
*: CAN communication
Heater and Ventilation: 7A-2
Additional Heater System Input / Output Diagram
S5JB0B7102004
Component Location
Additional Heater System Component Location
S5JB0B7103002
Additional heater relay No.1
Additional heater relay No.2
Additional heater relay No.3
CKP senser
IAT sencer
Battery voltage
ECT senser
ECM
I5JB0B710003-02
1
3
4
5
2
I5JB0B710004-01
1. Additional heater assembly
3. Additional heater relay No.1
5. Additional heater relay No.3
2. ECM
4. Additional heater relay No.2
7A-3 Heater and Ventilation:
Diagnostic Information and Procedures
Heater and Ventilation Symptom Diagnosis
S5JB0B7104008
Condition
Possible cause
Correction / Reference Item
Blower won’t work even
when blower speed
selector is ON
Blower fuse blown
Replace fuse to check for short.
Blower motor faulty
Check blower motor referring to “Blower Motor
Inspection in related manual”.
Blower motor relay faulty
Check relay referring to “Blower Motor Relay
Inspection in related manual”.
Blower motor controller faulty
Check blower motor controller referring to
“Blower Motor Controller Inspection in related
manual”.
Blower speed selector faulty
Check HVAC control module referring to
“HVAC Control Module and Its Circuits
Inspection (for Vehicle without A/C) in related
manual” or “HVAC Control Module and Its
Circuits Inspection in Section 7B in related
manual”.
Wiring or grounding faulty
Repair as necessary.
Air temperature is not
changed even when
temperature selector is
changed
Temperature control door broken
Repair Temperature control door.
Linkage broken
Check actuator linkage referring to “Actuator
Linkage Inspection in related manual”.
Heater hoses leaking or clogged
Replace hoses.
Heater core leaking or clogged
Replace heater core referring to “Heater Core
Removal and Installation”.
Temperature control actuator faulty
Check temperature control actuator referring to
“Temperature Control Actuator Inspection in
related manual”.
Temperature selector faulty
Check HVAC control module referring to
“HVAC Control Module and Its Circuits
Inspection (for Vehicle without A/C) in related
manual” or “HVAC Control Module and Its
Circuits Inspection in Section 7B in related
manual”.
Air outlet port is not
changed when air flow
selector is changed
Air flow control door broken
Repair air flow control door.
Linkage broken
Check actuator linkage referring to “Actuator
Linkage Inspection in related manual”.
Air flow control actuator faulty
Check air flow control actuator referring to “Air
Flow Control Actuator Inspection in related
manual”.
Mode selector faulty
Check HVAC control module referring to
“HVAC Control Module and Its Circuits
Inspection (for Vehicle without A/C) in related
manual” or “HVAC Control Module and Its
Circuits Inspection in Section 7B in related
manual”.
No fresh air inlet is
changed.
Fuse blown
Check related fuses and check for short circuit
to ground.
Air intake control actuator faulty
Check air intake control actuator.
Air intake control door broken
Repair air intake control door.
Linkage broken
Check actuator linkage referring to “Actuator
Linkage Inspection in related manual”.
Air intake selector faulty
Check HVAC Control module referring to
“HVAC Control Module and Its Circuits
Inspection (for Vehicle without A/C) in related
manual” or “HVAC Control Module and Its
Circuits Inspection in Section 7B in related
manual”.
Wiring or grounding faulty
Repair or replace as necessary.
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