Suzuki Grand Vitara JB416 / JB420 (ESP model). Service manual - part 101

10B-6 Body Electrical Control System: 

Final Confirmation Test
Confirm that the problem symptom has gone and the body electrical control system is free from any abnormal 
conditions. If what has been repaired is related to the malfunction DTC, check DTC again and confirm that no DTC is 
indicated.

Scan Tool Data

S5JB0EA204003

Scan tool Data

Condition

Normal condition / 

reference value

Vehicle Speed

At stop with ignition switch turned ON

0 km/h

Outside air Temp

Reference value is relative to outside air temperature

–40 

°C – 70 °C

(–40 

°F – 158 °F)

Battery Voltage

At specified idle speed after warming up

10 – 14 V

Coolant Temp

At specified idle speed after warming up

80 

°C – 100 °C

(176 

°F – 212 °F)

Engine Speed

Engine idling with no load applied after warming up

Desired idle speed

± 50 rpm

Fuel Consumption

At specified idle speed after warming up

0.0 km/l

Key Reminder Sw

Ignition key inserted in ignition key cylinder

Key in

Ignition key pulled out from ignition key cylinder

Pulled

Door key Sw 

Key cylinder switch of driver side door at lock position

LOCK

Key cylinder switch of driver side door not turned

Neutral

Key cylinder switch of driver side door at unlock position

Unlock

Door Lock Sw

Lock side of manual door lock switch pressed

LOCK

Manual door lock switch not pressed

Neutral

Unlock side of manual door lock switch pressed

Unlock

Driv Door Sw 

Driver side door open

Open

Driver side door closed

Close

Pass Door Sw

Doors other than driver side door open

Open

Doors other than driver side door closed

Close

Brake Fluid Level

Brake fluid level at MIN level or higher

Normal

Brake fluid level lower than MIN level

Low

Parking Brake Sw

Parking brake lever pulled

ON

Parking brake lever released

OFF

Rear Defogger Sw

Rear end door window defogger switch turned ON with engine 
running

ON

Rear end door window defogger switch turned OFF with engine 
running

OFF

Tail Light Sw

Lighting switch at HEAD or CLEARANCE position

ON

Lighting switch at OFF position

OFF

Driv Seat belt Sw

Driver side seat belt fastened

Fasten

Driver side seat belt unfastened

Unfasten

Charge Light

Engine at stop with ignition switch turned ON

ON

Engine running

OFF

Oil pressure switch

Engine at stop with ignition switch turned ON

ON

Engine running

OFF

A/C Switch

A/C and ignition switch turned ON

ON

A/C switch turned OFF

OFF

Rear Wiper Sw

Rear wiper switch at ON position

ON

Rear wiper switch at INT position

INT

Rear wiper switch at OFF position

OFF

Front Fog Light Sw

Lighting switch at HEAD or CLEARANCE position and front fog 
light switch at ON position

ON

Lighting switch at HEAD or CLEARANCE position and front fog 
light switch at OFF position

OFF

Headlight Sw

Lighting switch at HEAD position

ON

Lighting switch at OFF position

OFF

Body Electrical Control System:  10B-7

Scan Tool Data Definitions
Vehicle Speed (km/h, mph):  This parameter indicates the vehicle speed computed by ECM.
Outside air Temp (

°C, °F):  It is detected by outside air temperature sensor.

Battery Voltage (V):  This parameter indicates battery positive voltage inputted to BCM.
Coolant Temp (Engine coolant temperature) (

°C, °F):  This parameter indicates the engine coolant temperature 

computed by ECM.

Engine Speed (RPM):  This parameter indicates the engine speed computed by ECM.
Fuel Consumption (km/l):  This parameter indicates the fuel consumption computed by ECM.
Key Reminder Sw (Key reminder switch) (Pulled / Key in):  This parameter indicates the state of the key reminder 

switch.

Door key Sw (Door key cylinder switch) (Lock / Neutral / Unlock):  This parameter indicates the state of the door 

key cylinder switch.

Door lock Sw (Manual door lock switch) (Lock / Neutral / Unlock):  This parameter indicates the state of the 

manual door lock switch.

Driv Door Sw (Driver side door switch) (Open / Close):  This parameter indicates the state of the driver side door 

switch.

Pass Door Sw (Other than driver side door switch) (Open / Close):  This parameter indicates the state of the door 

switches other than driver side door switch.

Brake Fluid Level (Low / Normal):  Low: Brake fluid level is lower than specified level.

Normal: Brake fluid level is higher than MIN level.

Parking Brake Sw (Parking brake switch) (ON / OFF):  ON: Parking brake lever is pulled up.

OFF: Parking lever is released

Rear Defogger Sw (Rear end door window defogger switch) (ON / OFF):  This parameter indicates the state of 

the rear end door window defogger switch.

Tail Light Sw (Lighting switch) (ON / OFF):  This parameter indicates the state of the lighting switch.
Driv Seat belt Sw (Driver seat belt switch) (Fasten / Unfasten):  This parameter indicates the state of the driver 

side seat belt buckle switch.

Charge Light (ON / OFF):  This parameter indicates the state of the charge system monitor switch.
Oil pressure switch (ON / OFF):  This parameter indicates the state of the oil pressure switch.
A/C Switch (ON / OFF):  This parameter indicates the state of the air conditioning switch.
Rear Wiper Sw (Rear wiper switch) (ON / INT / OFF):  This parameter indicates the state of the rear wiper switch.
Front Fog Light Sw (Front fog light switch) (ON / OFF):  This parameter indicates the state of the front fog light 

switch.

Headlight Sw (Headlight switch) (ON / OFF):  This parameter indicates the state of the lighting switch.

Diagnosis Using Output Test Function of SUZUKI Scan Tool
SUZUKI scan tool has the output test function which can force operation of following actuators and relays of the 
system controlled by BCM. When a malfunction is found in the system controlled by BCM, execute the output test 
which enables easy judgment whether the malfunction is on the input side or output side of BCM. For detailed 
information on operation of SUZUKI scan tool, refer to “SUZUKI Scan Tool Operator’s Manual”.

Output Test Item

Controlled Parts

Hazard Warning Light

Turn signal and hazard warning relay

Interior (Dome) Light

Interior (Dome) light (when interior light switch is at DOOR position)

Parking/Tail Light

Tail light relay

Front Fog Light

Front fog light relay (when lighting switch is at CLEARANCE position)

Rear defogger

Rear defogger and mirror heater relays

D.R.L.

Headlight low beam relay

Auto on headlight

Headlight low beam and tail light relays

Door

Each door lock actuator

Dead lock

Each door lock actuator

Warning buzzer

Warning buzzer (in BCM)

Rear wiper

Rear wiper relay

Alarm indicator

Theft deterrent light (in HVAC control module)

10B-8 Body Electrical Control System: 

DTC Table

S5JB0EA204004

DTC 

(displayed on 

SUZUKI scan 

tool)

DTC (indicated 

by theft 

deterrent light) 

DTC (displayed on 

odometer in 

combination meter) 

Detected item

Detecting condition

NO DTC

0000

0000

—

No DTC detected

)

 B1133

1133

b1133

Battery voltage too high

Battery voltage too high

)

 B1141

1141

b1141

Outside air temperature 
(ambient temperature) 
sensor circuit open

Sensor output voltage too 
high

)

 B1142

1142

b1142

Outside air temperature 
(ambient temperature) 
sensor circuit short to 
ground

Sensor output voltage too 
low

)

 B1150

1150

b1150

Air bag communication 
circuit malfunction

Air bag communication 
circuit open or short to 
ground

)

 B1157

1157

b1157

Air bag deployment signal 
input

Air bag deployment signal 
inputted

)

 B1170

1170

b1170

EEPROM access error

Memory error

)

 U1073

1073

U1073

Control module 
communication bus off

Transmitting and receiving 
error of BCM for specified 
time continuously

)

 U1100

1100

U1100

Lost communication with 
ECM

Receiving error of BCM from 
ECM for specified time 
continuously

)

 U1101

1101

U1101

Lost communication with 
TCM

Receiving error of BCM from 
TCM for specified time 
continuously

)

 U1144

1144

U1144

Lost communication with 
keyless start control module

Receiving error of BCM from 
keyless start control module 
for specified time 
continuously

Body Electrical Control System:  10B-9

DTC B1141 / B1142 (No. 1141 / No. 1142): Outside Air Temperature (Ambient Temp.) Sensor Circuit 
Malfunction

S5JB0EA204009

Wiring Diagram

DTC Detecting Condition and Possible Cause

Flow Test Description
Step 1: Check whether malfunction is in outside air temperature sensor.
Step 2: Check outside air temperature sensor circuit.

DTC Troubleshooting

7

8

9

10

11

12

13

14

15

6

5

4

3

2

1

G32

24

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

G30

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

G31

WHT/BLK

BLK/RED

5V

G31-24

G31-21

1

2

2

3

1

I5JB0AA20007-01

1. Outside air temperature sensor

3. Outside air temperature sensor connector

2. BCM

DTC detecting condition

Possible cause

DTC B1141 (DTC No. 1141):
Input signal from outside air temperature sensor is higher 
than 4.88 V.

• Open in outside air temperature sensor circuit
• Outside air temperature sensor malfunction
• BCM malfunction

DTC B1142 (DTC No. 1142):
Input signal from outside air temperature sensor is lower 
than 0.1 V.

• Short in outside air temperature sensor circuit
• Outside air temperature sensor malfunction
• BCM malfunction

Step

Action

Yes

No

1

Outside air temperature sensor check
1) Turn ignition switch to OFF position.
2) Disconnect connector from outside air temperature 

sensor.

3) Check outside air temperature sensor for resistance 

referring to “Outside Air Temperature Sensor Inspection 
(If Equipped) in Section 9C in related manual”.

Is it in good condition?

Go to Step 2.

Replace outside air 
temperature sensor.