Suzuki Grand Vitara JB419. Service manual — part 176
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 lamp (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
S5JB0BA204004
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
Body Electrical Control System: 10B-9
DTC U1073 (No. 1073): Control Module Communication Bus Off
S5JB0BA204013
Wiring Diagram
[A]
[E]
WHT/BLU
WHT/BLU
WHT/RED
WHT/RED E66-32
E66-26
WHT
RED
WHT
RED
WHT
RED
E91-22
E91-23
WHT
RED
RED
G31-1
G31-3
G31-4
1
2
3
4
5
6
7
8
9
10
11
17
1615141312
2221201918
G28
[D]
G31
E91
1
2
3
4
7
8
9
10
11
14
15
16
36
34
35
24 23
21
22
28 27
25
26
37
39 38
40
18 17
13 12
19
20
1
2
3
10
11
12
16
17
18
15 14 13
19
20
21
22
23
24
25
26
5
4
7
8
9
6
[G]
E53
[F]
E03
15
16
17
18
19
20
21
22
23
24
25
2
3
4
5
6
7
8
9
10
11
12
1
13
14
26
G31-2
WHT
G28-8
G28-10
1
2
3
WHT
RED
G45-10
G45-9
5
4
6
8
[I]
E03-12
E03-10
E03-6
E03-8
7
[J]
E53-13
E53-42
E53-44
E53-46
[C]
8 7
6 5 4 3
2 1
9
10
11
12
13
14
15
16
16
1
15
2
3
4
5
6
7
8
9
10
11
12
13
14
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
1
3
7
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
2
4
6
8
9
10
11
12
13
14
5
E66
[B]
[H]
G45
10 9
3 2 1
9
I5JB0BA20005-01
[A]: BCM connector (viewed from harness side)
1. BCM
[B]: ECM connector (viewed from harness side)
2. 4WD control module (if equipped)
[C]: DLC (viewed from harness side)
3. Combination meter
[D]: Combination meter connector (viewed from harness side)
4. DLC
[E]: 4WD control module connector (viewed from harness side)
5. Junction connector
[F]: ABS control module connector (viewed from terminal side)
6. ECM
[G]: ESP
® control module connector (viewed from terminal side)
7. ESP
® control module
[H]: Steering angle sensor connector (viewed from harness side)
8. ABS control module
[I]: Vehicle not equipped with ESP
®
9. Steering angle sensor
[J]: Vehicle equipped with ESP
®
10B-10 Body Electrical Control System:
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 for 1 min. or more.
4) Check DTC and pending DTC.
Troubleshooting
DTC detecting condition
Trouble area
Transmission error that is inconsistent between transmission data
and transmission monitor (CAN bus monitor) data is detected more
than 7 times continuously.
(1 driving detection logic)
• CAN circuit
• Combination meter
• BCM
• 4WD control module (if equipped)
• ABS or ESP
® control module
• ECM
Step
Action
Yes
No
1
Check each control unit connectors
1) Check connection of connectors of all control modules
communicating by means of CAN and reconnect
securely.
2) Recheck DTC and reconnect securely.
Is DTC U1073 detected?
Go to Step 2.
Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section 00
in related manual”.
2
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?
Go to Step 3.
Repair circuit.
3
Check DTC in BCM
1) Turn ignition switch to OFF position.
2) Connect connectors of disconnected control modules
communicating by means of CAN.
3) Disconnect connector from any one of control modules
other than BCM.
4) Recheck DTC for BCM.
Is DTC U1073 detected?
Disconnect connectors
of control modules other
than the one whose
connector is
disconnected in Step 3)
one by one and check
that DTC U1073 is
detected by BCM each
time connector is
disconnected. When
DTC U1073 is not
detected by BCM while
checking in this way, go
to description under
“NO” below. If DTC
U1073 is detected by
BCM even when
connectors of all control
modules that use CAN
communication with
BCM are disconnected,
substitute a known-
good BCM and recheck.
Check power and
ground circuit of control
module disconnect in
Step 3). If circuit is OK,
substitute a known-
good control module
disconnected in Step 3)
and recheck.
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