Suzuki Grand Vitara JB416 / JB420. Manual — part 318
8B-68 Air Bag System:
DTC B1074 / B1078: Driver / Passenger Forward-Sensor Circuit Short to Power Circuit or Open
S5JB0A8204037
Wiring Diagram
Refer to “DTC B1073 / B1077: Driver / Passenger Forward-Sensor Circuit Short to Ground”.
CAUTION
!
Be sure to observe instructions under CAUTION in “Air Bag Diagnostic System Check Flow”.
DTC Will Set when
Forward-sensor abnormal signal is detected by SDM.
Flow Test Description
Step 1: Check for open circuit in forward-sensor circuit.
Step 2: Check for short circuit between forward-sensor circuit and power supply circuit.
Step 3: Check if malfunction is in forward-sensor.
DTC Troubleshooting
Step
Action
Yes
No
1
1) Turn ignition switch to OFF position.
2) Disconnect forward-sensor connector “E13” or “E24”.
3) Disconnect SDM connector “G47” or “L33”.
4) Check proper connection to SDM connector at terminals
“G47-9” and “G47-17” or “L33-9” and “L33-10” (for DTC
B1074), or terminals “G47-11” and “G47-19” or “L33-11”
and “L33-12” (for DTC B1078).
5) Check proper connection to forward-sensor connector at
terminals “E13-1” and “E13-2” or “E24-1” and “E24-2”.
6) Using service wire (1), connect “E13-1” and “E13-2”
terminal (for DTC B1074) or “E24-1” and “E24-2”
terminal (for DTC B1078) of forward-sensor connector.
7) Measure resistance between “G47-9” and “G47-17” (for
DTC B1074) or “G47-11” and “G47-19” (for DTC B1078)
[A], or between “L33-9” and “L33-10” (for DTC B1074) or
“L33-11” and “L33-12” (for DTC B1078) [B].
Special tool
(A): 09932–76010
Is each measured resistance 1
Ω
or less?
Go to Step 2.
For DTC B1074: High
resistance or open wire
in “ORN” circuit or
“PNK/BLK” circuit.
For DTC B1078: High
resistance or open wire
in “PNK” circuit or “PNK/
BLU” circuit.
“E13-1”, “E24-1”
“E13-2”, “E24-2”
1
[A]
[B]
“L33-12”
“L33-9” “L33-10” “L33-11”
“G47-9” “G47-17” “G47-19” “G47-11”
(A)
I5JB0A820051-01
Air Bag System: 8B-69
NOTE
Upon completion of inspection and repair work, perform the following items.
• Reconnect all air bag system components and ensure all components are properly mounted.
• Clear DTCs referring to “DTC Clearance”, if any.
• Repeat “Air Bag Diagnostic System Check” to confirm that the trouble has been corrected.
2
1) Disconnect service wire from “E13” or “E24” connector.
2) Measure voltage between “G47-9” and body ground,
“G47-17” and body ground (for DTC B1074) or “G47-11”
and body ground, “G47-19” and body ground (for DTC
B1078) [A], or between “L33-9” and body ground, “L33-
10” and body ground (for DTC B1074) or “L33-11” and
body ground, “L33-12” and body ground (for DTC
B1078) [B].
Special tool
(A): 09932–76010
With ignition switch ON, is each measured value 1 V or less?
Go to Step 3.
For DTC B1074: “ORN”
circuit or “PNK/BLK”
circuit shorted to power
circuit.
For DTC B1078: “PNK”
circuit or “PNK/BLU”
circuit shorted to power
circuit.
3
1) Check forward-sensor referring to “Forward-Sensor
Is it in good condition?
Substitute a known-
good SDM and recheck.
Replace forward-sensor
referring to “Forward-
Sensor Removal and
Installation”. If DTC still
exists, substitute a
known-good SDM and
recheck.
Step
Action
Yes
No
(A)
[A]
[B]
“G47-11”
“G47-9” “G47-17” “G47-19 ”
“L33-9”
“L33-10”
“L33-11” “L33-12”
I5JB0A820052-01
8B-70 Air Bag System:
DTC B1085: Wrong Side-Sensor ID
S5JB0A8204042
DTC Will Set when
SDM receives wrong ID (Part No.) signal from side-sensor.
DTC Troubleshooting
1) Turn ignition switch OFF.
2) Replace driver or passenger side-sensor referring to “Side-Sensor Removal and Installation”.
3) Repeat “Air Bag Diagnostic System Check”.
NOTE
Upon completion of inspection and repair work, perform the following items.
• Reconnect all air bag system components and ensure all components are properly mounted.
• Clear DTCs referring to “DTC Clearance”, if any.
• Repeat “Air Bag Diagnostic System Check” to confirm that the trouble has been corrected.
DTC B1086 / B1096: Left / Right Side-Sensor Performance Problem
S5JB0A8204038
DTC Will Set when
SDM receives internal fault signal from side-sensor.
DTC Troubleshooting
1) Turn ignition switch OFF.
2) Replace left or right side-sensor referring to “Side-Sensor Removal and Installation”.
3) Repeat “Air Bag Diagnostic System Check”.
NOTE
Upon completion of inspection and repair work, perform the following items.
• Reconnect all air bag system components and ensure all components are properly mounted.
• Clear DTCs referring to “DTC Clearance”, if any.
• Repeat “Air Bag Diagnostic System Check” to confirm that the trouble has been corrected.
DTC B1087 / B1097: Left / Right Side-Sensor Communication Error
S5JB0A8204039
Wiring Diagram
CAUTION
!
Be sure to observe instructions under CAUTION in “Air Bag Diagnostic System Check Flow”.
BLK
G46-16 GND
“G46”
1
2
4
3
RED
BLK/YEL
“G01”
G46-11
IG
L33-15
L33-16
SR+
SR-
L33-14
L33-13
SL+
SL-
“L33”
WHT/RED
LT GRN/BLK
WHT/GRN
LT GRN
“L11”
“L35”
8
5
6
7
I5JB0A820053-02
1. From main fuse
4. Junction block assembly
7. Right side-sensor
2. Ignition switch
5. SDM
8. Ground for air bag system
3. “A/B” fuse
6. Left side-sensor
Air Bag System: 8B-71
DTC Will Set when
Side-sensor abnormal signal is detected by SDM.
Flow Test Description
Step 1: Check for open circuit in forward sensor circuit.
Step 2: Check for short circuit between forward sensor circuit and ground.
Step 3: Check for short circuit between forward sensor circuit and power supply circuit.
Step 4: Check if malfunction is in forward sensor.
DTC Troubleshooting
Step
Action
Yes
No
1
1) Disconnect side-sensor connector “L35” or “L11”.
2) Disconnect SDM connector “L33”.
3) Check proper connection to SDM connector at terminals
“L33-13” and “L33-14” or “L33-15” and “L33-16”.
4) Check proper connection to side-sensor connector at
terminals “L35-1” and “L35-2” or “L11-1” and “L11-2”.
5) Using service wire (1), connect “L35-1” and “L35-2”
terminal (for DTC B1087) or “L11-1” and “L11-2” terminal
(for DTC B1097) of side-sensor connector.
6) Measure resistance between terminals “L33-13” and
“L33-14” (for DTC B1087) or terminals “L33-15” and
“L33-16” (for DTC B1097) of SDM connector.
Special tool
(A): 09932–76010
Is each measured resistance 1
Ω
or less?
Go to Step 2
For DTC B1087: High
resistance or open wire
in “WHT/RED” circuit or
“LT GRN/BLK” circuit.
For DTC B1097: High
resistance or open wire
in “WHT/GRN” circuit or
“LT GRN” circuit.
2
Measure resistance between “L33-13” terminal and body
ground, and “L33-14” terminal and body ground (for DTC
B1087) or between “L33-15” terminal and body ground, and
“L33-16” terminal and body ground (for DTC B1097).
Special tool
(A): 09932–76010
Is each measured resistance infinity?
Go to Step 3.
For DTC B1087: “WHT/
RED” circuit or “LT
GRN/BLK” circuit
shorted to ground.
For DTC B1087: “WHT/
GRN” circuit or “LT
GRN” circuit shorted to
ground.
“L35-1”, “E11-1”
“L35-2”, “L11-2”
1
(A)
“L33-13” “L33-14” “L33-15” “L33-16”
I5JB0A820054-01
“L33-13” “L33-14” “L33-15” “L33-16”
(A)
I5JB0A820055-01
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