ECT sensor SUZUKI GRAND VITARA 2001 2.G Owners Manual

AIR BAG SYSTEM 10B-37
DTC B1036 and B1038 :
STEP 1 : Check whether malfunction is in forward sensor.
STEP 2 : Check if forward sensor circuit is shorted between two wires.
STEP 3 : Check if forward sensor circuit is shorted to power circuit.
DIAGNOSTIC FLOW TABLE
DTC B1035 and B1037 :
Step Action Yes No
1 1) Ignition switch OFF.
2) Disconnect driver air bag (inflator) module
connector, passenger air bag (inflator) mod-
ule connector, driver pretensioner module
connector, and passenger pretensioner
module connector.
3) Disconnect forward sensor.
4) Check proper connection to forward sensor
connector at “ORN/GRN” and “ORN/BLU”
terminals or “YEL/GRN” and “YEL/BLU” ter-
minals.
5) If OK then measure resistance between ter-
minals of forward sensor.
Is resistance 738 – 905 Ω?Go to step 2. Replace forward sensor.
2 1) Reconnect forward sensor.
2) Disconnect SDM connector.
3) Check proper connection to SDM connector
at terminals “Q01-13” and “Q01-14” or ter-
minals “Q01-18” and “Q01-19”.
4) If OK then measure resistance between ter-
minal “Q01-13” and “Q01-14” or terminal
“Q01-18” and “Q01-19”.
Is circuit open?Repair open in “ORN/
GRN” and “ORN/BLU”
wire circuit (between for-
ward sensor and SDM) or
“YEL/GRN” and “YEL/
BLU” wire circuit
(between forward sensor
and SDM).Go to step 3.
3 1) Disconnect forward sensor.
2) Measure resistance between “Q01-13” ter-
minal and body ground, “Q01-14” terminal
and body ground, or between “Q01-18” ter-
minal and body ground, “Q01-19” terminal
and body ground.
Are circuits open?Substitute a known-good
SDM and recheck.Repair short from “ORN/
GRN” or “ORN/BLU” wire
circuit (between forward
sensor and SDM) to
ground, or from “YEL/
GRN” or “YEL/BLU” wire
circuit (between forward
sensor and SDM) to
ground.

10B-38 AIR BAG SYSTEM
[A] Fig. for STEP 1/[B] Fig. for STEP 2/[C] Fig. for STEP 3
Special tool
(A) : 09932-75020
DTC B1036 and B1038 :
NOTE:
Upon completion of inspection and repair work, perform following items.
Reconnect all air bag system components, ensure all components are properly mounted.
Clear diagnostic trouble codes (Refer to DTC CLEARANCE), if any.
Repeat AIR BAG DIAGNOSTIC SYSTEM CHECK to confirm that the trouble has been corrected.
Step Action Yes No
1 1) Ignition switch OFF.
2) Disconnect driver air bag (inflator) module
connector, passenger air bag (inflator) mod-
ule connector, driver pretensioner module
connector, and passenger pretensioner
module connector.
3) Disconnect forward sensor.
4) Check proper connection to forward sensor
connector at “ORN/GRN” and “ORN/BLU”
terminals or “YEL/GRN” and “YEL/BLU” ter-
minals.
5) If OK then measure resistance between ter-
minals of forward sensor.
Is resistance 738 - 905 Ω?Go to step 2. Replace forward sensor.
2 1) Disconnect SDM connector.
2) Check proper connection to SDM connector
at terminals “Q01-13” and “Q01-14” or ter-
minals “Q01-18” and “Q01-19”.
3) If OK then measure resistance between ter-
minal “Q01-13” and “Q01-14” or terminal
“Q01-18” and “Q01-19”.
Is circuit open?Go to step 3. Repair short from “ORN/
GRN” wire circuit
(between forward sensor
and SDM) to “ORN/BLU”
wire circuit (between for-
ward sensor and SDM), or
from “YEL/GRN” wire cir-
cuit (between forward
sensor and SDM) to “YEL/
BLU” wire circuit
(between forward sensor
and SDM).

AIR BAG SYSTEM 10B-39
[A] Fig. for STEP 1/[B] Fig. for STEP 2/[C] Fig. for STEP 3
Special tool
(A) : 09932-75020 3 1) Measure voltage from “Q01-13” terminal to
body ground and “Q01-14” terminal to body
ground, or from “Q01-18” terminal to body
ground and “Q01-19” terminal to body
ground.
With ignition switch ON, are they 1V or less?Substitute a known-good
SDM and recheck.Repair short from “ORN/
GRN” or “ORN/BLU” wire
circuit (between forward
sensor and SDM) to
power circuit, or from
“YEL/GRN” or “YEL/BLU”
wire circuit (between for-
ward sensor and SDM) to
power circuit. Step Action Yes No
NOTE:
Upon completion of inspection and repair work, perform following items.
Reconnect all air bag system components, ensure all components are properly mounted.
Clear diagnostic trouble codes (Refer to DTC CLEARANCE), if any.
Repeat AIR BAG DIAGNOSTIC SYSTEM CHECK to confirm that the trouble has been corrected.

10B-56 AIR BAG SYSTEM
Repairs and Inspections Required after an Accident
Accident with deployment/activation - component replacement
Certain air bag system components must be replaced. Those components are:
•Driver and passenger air bag (inflator) modules
–Replace with new one.
•Driver and Passenger seat belt pretensioners
–Replace with new one.
•SDM after detecting such collision as to meet deployment conditions
–Replace with new one.
•Forward sensors
–Replace with new one. CAUTION:
All air bag system components, including the electrical harness (component mounting points),
must be inspected after an accident. If any components are damaged or bent, they must be replaced
even if air bag system activation did not occur.
Never use air bag system parts from another vehicle.
Do not attempt to service the parts below. Service of these parts is by replacement only.
–Driver/Passenger air bag (inflator) modules, Driver/Passenger seat belt pretensioners
–Forward sensors
–SDM
–Contact coil and combination switch assembly
–Air bag wire harness
Proper operation of the sensors and air bag system requires that any repairs to the vehicle struc-
ture return it to its original production configuration.
CAUTION:
After detecting one time of such collision as to meet deployment conditions, the SDM must not be
used.
Refer to “AIR BAG DIAGNOSTIC SYSTEM CHECK” when checking the SDM.

AIR BAG SYSTEM 10B-59
•Forward sensor
–Check sensor (1), sensor bracket (2), and front panel (3) for
damage bend or rust.
–Check that connector (4) or lead wire (5) of forward sensor
has a scorching, melting or damage.
If any faulty condition is found in above checks, replace.
•Seat belt pretensioner
–Check for dents, cracks, damage or fitness
–Check harness and connector for damage or tightness.
If any faulty condition is found in above checks, replace.
•Seat belts and mounting points
–Refer to “FRONT SEAT BELT WITH PRETENSIONER” in
SECTION 10A.
•“AIR BAG” warning lamp
–After vehicle is completely repaired, perform “AIR BAG
DIAGNOSTIC SYSTEM CHECK”.
543
2
1

10B-62 AIR BAG SYSTEM
Forward Sensor
REMOVAL
1) Disconnect negative cable at battery.
2) Disable air bag system. Refer to “DISABLING AIR BAG
SYSTEM” in this section.
3) Remove front grill referring to “FRONT BUMPER” in Section
9.
4) Disconnect forward sensor connector sliding connector outer
(1) as shown.
5) Remove forward sensor bolts (1), and forward sensor (2)
from front panel (3). WARNING:
During service procedures, be very careful when han-
dling a sensor.
Never strike or jar a sensor.
Under some circumstances, it could cause improper
operation of the air bag system. A sensor and mount-
ing bracket bolts must be carefully torqued to assure
proper operation.
1
1
1
3
2

AIR BAG SYSTEM 10B-63
INSPECTION
•Check sensor (1) and its bracket (2) for dents, cracks, defor-
mation or rust.
•Check sensor connector (sensor side and harness side) or
lock mechanism for damage or crack.
•Check connector terminals for bent, corrosion or rust.
•Check sensor for resistance.
Sensor resistance : 738 - 905 Ω
ΩΩ Ω
INSTALLATION
1) Check that none of following faulty conditions exists.
•Bend or deformity of sensor bracket (1) and front panel.
•Foreign matter on mating surface of sensor bracket (1) with
sensor or excessive rust.
2) Apply thread lock cement to mounting bolts thread. Install
forward sensor (1) on front panel (2) and tighten mounting
bolts (3) to specified torque.
“A” : Thread lock cement “1332B” 99000-32100
Tightening torque
(a) : 10 N·m (1.0 kg-m, 7.2 lb-ft) CAUTION:
Never disassemble forward sensor.
Sensor should be replaced when it was dropped from a
height of 90 cm (3 ft) or more.
2
1
CAUTION:
Proper operation of forward sensor requires sensor be
rigidly attached to vehicle structure and that the arrow on
sensor bracket be pointing toward the front of the vehi-
cle.
1
3
2
1

10B-64 AIR BAG SYSTEM
3) Connect forward sensor connector pushing connector inner
(1) as shown.
4) Connect negative cable at battery.
5) Enable air bag system. Refer to “ENABLING AIR BAG SYS-
TEM” in this section.
Seat Belt Pretensioner
Refer to “FRONT SEAT BELT” in Section 10A for removal,
inspection and installation.
1
1

AIR BAG SYSTEM 10B-77
Tightening Torque Specification
Special Tool
Fastening partTightening torque
Nm kg-m lb-ft
SDM bolt 6 0.6 4.5
Passenger air bag (inflator) module screw 5.5 0.55 4.0
Passenger air bag (inflator) module bolt 23 2.3 16.5
Forward sensor bolt 10 1.0 7.2
Driver air bag (inflator) module bolt Refer to Section 3C1.
Seat belt pretensioner (retractor assembly) bolt Refer to Section 10A.
09932-75010 09932-75030 09932-75041 09932-75020
Air bag driver/passenger
load toolAir bag deployment har-
nessPassenger air bag (infla-
tor) module deployment
fixtureConnector test adapter kit
09931-76030 09931-76011
Digital multimeter
(See NOTE “B” and
WARNING.)16/14 pin DLC cable for
Tech-1ATech-1A kit (SUZUKI scan
tool)
(See NOTE “A”.)Mass storage cartridge for
Tech-1A
Tech-2 kit (SUZUKI scan
tool) (See NOTE “C”.)