Suzuki Grand Vitara JB416 / JB420. Manual - part 281

7B-15 Air Conditioning System: 

5) After completing above check, turn ignition switch to 

“OFF” position.

NOTE
HVAC control module returns to a original 
state at the following conditions.
• Ignition switch turned to “OFF” position
• Temperature selector is operated
• Blower speed selector is operated
• 5 minutes have passed since HVAC control 

unit started DTC display

 

DTC Clearance

S5JB0A7204029

Using SUZUKI Scan Tool

1) Turn ignition switch to OFF position.
2) Connect SUZUKI scan tool to data link connector 

(DLC) (1).

Special tool
(A):  SUZUKI scan tool

3) Turn ignition switch to ON position.
4) Erase DTC according to instructions displayed on 

SUZUKI scan tool. Refer to SUZUKI scan tool 
operator’s manual for further details.

5) After completing the clearance, turn ignition switch to 

OFF position and disconnect SUZUKI scan tool from 
DLC.

6) Perform “DTC Check” and confirm if normal DTC 

(NO CODES) is displayed.

Not Using SUZUKI Scan Tool

1) Display history DTC by HVAC control module 

referring to “Not Using SUZUKI Scan Tool” under 
“DTC Check”.

2) Confirm display DTC and light “DEF” indicator lamp 

(1).

3) Push “DEF” switch (2) at 5 seconds or more.

4) After completing the clearance, turn ignition switch 

OFF position.

5) Perform “DTC Check”, and confirm if normal DTC is 

displayed and if any other DTC is detected.

(A)

1

I5JB0A720014-01

1

2

I5JB0A720016-03

Air Conditioning System:  7B-16

DTC Table

S5JB0A7204030

CAUTION

!

 

Be sure to perform “Air Conditioning System Check” before starting diagnosis.

 

NOTE
When no abnormality is detected, “FRE” indicator lamp and “REC” indicator lamp repeat cycle of ON 
for 2 seconds and OFF for 1 second.

 

DTC No. 

(displayed on 

SUZUKI scan tool)

DTC (indicated on HVAC 

control module)

Priority 

of 

display

Diagnosis

Indicated by 

“REC” 

indicator 

lamp

Indicated by 

“FRE” 

indicator 

lamp

)

 B1562

1

4

1

Outside air temperature sensor and/or its 
circuit malfunction

Data error

)

 B1502

2

1

2

Inside air temperature sensor and/or its 
circuit malfunction

Open

2

3

Short

)

 B1503

3

1

4

Evaporator temperature sensor and/or its 
circuit malfunction

Open

2

5

Short

)

 B1504

4

1

29

Sunload sensor and/or its circuit 
malfunction

Open

2

6

Short

)

 B1561

5

4

7

Engine coolant temperature sensor and/or 
its circuit malfunction

Data error

)

 B1511

6

1

8

Temperature control actuator (position 
sensor) and/or its circuit malfunction

Open

2

9

Short

)

 B1513

3

10

Temperature control actuator and/or its 
circuit malfunction

Lock detect

)

 B1512

7

1

11

Air flow control actuator (position sensor) 
and/or its circuit malfunction

Open

2

12

Short

)

 B1514

3

13

Air flow control actuator and/or its circuit 
malfunction

Lock detect

)

 B1530

8

1

14

Air intake control actuator (position 
sensor) and/or its circuit malfunction

Open

2

15

Short

)

 B1531

3

16

Air intake control actuator and/or its circuit 
malfunction

Lock detect

)

 B1551

9

1

17

Serial communication circuit malfunction

Open

2

18

Short

)

 B1552

4

19

Data error

)

 B1553

10

4

20

CAN communication circuit malfunction

Data error

)

 B1557

11

4

21

Wheel speed sensor and/or its circuit 
malfunction

Data error

)

 B1556

12

4

22

Camshaft position (CMP) sensor and/or its 
circuit malfunction

Data error

)

 B1563

13

4

23

A/C refrigerant pressure sensor and/or its 
circuit malfunction

Data error

)

 B1546

5

24

A/C refrigerant pressure sensor 
malfunction

Refrigerant 

pressure 

malfunction

)

 B1520

15

1

25

Temperature selector malfunction

Open

2

26

Short

)

 B1521

16

1

27

Blower speed selector malfunction

Open

2

28

Short

—

See NOTE below

—

Normal

—

7B-17 Air Conditioning System: 

Example of “REC” Indicator Lamp Flashing Pattern

Example of “FRE” Indicator Lamp Flashing Pattern

NOTE
Locked actuator, data error and refrigerant pressure malfunction are indicated by flashing pattern of 
“FRE” indicator lamp specified for each of them.

 

[A]

(a)

(b)

(d)

(c)

(e)

(d)

[B]

(a)

(b)

(d)

(c)

(e)

(f)

(f)

(d)

I5JB0A720017-01

[A]: B1503 (No.3)

(b): “REC” indicator lamp “OFF”

(e): 2.0 (sec.)

[B]: B1556 (No.12)

(c): Time (sec.)

(f): 1.5 (sec.)

(a): “REC” indicator lamp “ON”

(d): 0.5 (sec.)

[A]: Open

(b): “FRE” indicator lamp “OFF”

(e): 2.0 (sec.)

[B]: Short

(c): Time (sec.)

(a): “FRE” indicator lamp “ON”

(d): 0.5 (sec.)

[A]

(a)

(b)

[B]

(a)

(b)

(d)

(e)

(e)

(c)

(d)

(e)

(c)

(d)

(d)

I5JB0A720018-01

Air Conditioning System:  7B-18

Display Timing of “FRE” Indicator Lamp and “REC” Indicator Lamp
Code with short display time waits until display of code with long display time is over.

Fail-Safe Table

S5JB0A7204031

When any of the following malfunctions (DTCs) is detected, HVAC control module enters fail-safe mode.
However, when HVAC control module detects normal operation of A/C system, fail-safe mode is canceled.

[A]: B1520 (15 – 1)

(a): “REC” indicator flashing pattern

[B]: B1562 (1 – 4)

(b): “FRE” indicator flashing pattern

[A]

(a)

(b)

[B]

(a)

(b)

I5JB0A720019-02

DTC No.

Trouble Area

Fail-Safe Operation

When ignition switch is turned 

ON after malfunction is already 

detected

When malfunction is detected 

during ignition switch is ON

)

 B1502

Inside air temperature 
sensor and/or its circuit 
malfunction 

HVAC control module controls actuators assuming that inside air 
temperature is 25 

°C (77 °F).

)

 B1503

Evaporator temperature 
sensor and/or its circuit 
malefaction

HVAC control module controls actuators assuming that amount of 
evaporator temperature is –6 

°C (21.2 °F).

)

 B1504

Sunload sensor and/or its 
circuit malfunction 

HVAC control module controls actuators assuming that amount of sunlight is 
0 W/m

2

.

)

 B1511

Temperature control 
actuator (position sensor) 
and/or its circuit malfunction 

Circuit open: Temperature control actuator fixed to “MAX HOT” position.
Circuit short: Temperature control actuator fixed to “MAX COOL” position.

)

 B1512

Air flow control actuator 
(position sensor) and/or its 
circuit malfunction 

Circuit open: Air flow control actuator fixed to “DEF” position.
Circuit short: Air flow control actuator fixed to “VENT” position.

)

 B1513

Temperature control 
actuator and/or its circuit 
malfunction 

Stop the operation of temperature control actuator.

)

 B1514

Air flow control actuator 
and/or its circuit malfunction 

Stop the operation of Air flow control actuator.

)

 B1520

Temperature selector 
malfunction 

HVAC control module keeps 
condition just before malfunction is 
detected.

HVAC control module controls 
actuators assuming that setting of 
temperature selector is 23 

°C (73.4 °F).

)

 B1521

Blower speed selector 
malfunction 

HVAC control module keeps 
condition just before malfunction is 
detected.

HVAC control module controls 
actuators assuming that as follows.
• Blower speed is minimum.
• Air flow control actuator fixed to 

“DEF” position.

)

 B1530

Air intake control actuator 
(position sensor) and/or its 
circuit malfunction 

Circuit open: Air intake control actuator fixed to “FRE” position.
Circuit short: Air intake control actuator fixed to “REC” position.

)

 B1531

Air intake control actuator 
and/or its circuit malfunction 

Stop the operation of temperature control actuator.