1. CHECK COMBINATION METER ASSEMBLY
(a) Disconnect the J28 combination meter assembly connector.
(b) Disconnect the J28 combination meter assembly connector.
(c) Measure the resistance and voltage according to the value(s) in the table
below.
(d) Reconnect the J28 combination meter assembly connector.
(e) Measure the voltage according to the value(s) in the table below.
2. CHECK CENTER AIRBAG SENSOR ASSEMBLY
3. CHECK OCCUPANT DETECTION ECU
(a) Measure the voltage according to the value(s) in the table below.
Since the occupant detection ECU uses waterproof connectors, the voltage and
waveform cannot be inspected directly. Standard voltage readings and waveforms are
indicated for reference only.
|
Terminal No. (Symbol)
|
Wiring Color
|
Terminal Description
|
Condition
|
Specification
|
|
Y2-1 (+B) - Y2-3 (GND)
|
W - W-B
|
Battery
|
Ignition switch ON
|
11 to 14 V
|
|
Y2-2 (DIA) - Y2-3 (GND)
|
GR - W-B
|
Diagnosis (DLC3)
|
Ignition switch ON
|
Pulse generation
|
|
Y2-3 (GND) - Body ground
|
W-B - Body ground
|
Ground
|
Always
|
Below 1 Ω
|
|
Y2-4 (FSR-) - Y2-3 (GND)
|
Y - W-B
|
Center airbag sensor communication ground line
|
Always
|
Below 1 Ω
|
|
Y2-5 (BGND) - Y2-3 (GND)
|
P - W-B
|
Passenger side buckle switch ground line
|
Always
|
Below 1 Ω
|
|
Y2-7 (IG2) - Y2-3 (GND)
|
B - W-B
|
Power source (IGN fuse)
|
Ignition switch ON
|
11 to 14 V
|
|
Y2-8 (FSR+) - Y2-4 (FSR-)
|
L - Y
|
Center airbag sensor communication line
|
Ignition switch ON
|
Pulse generation
|
|
Y2-9 (BSW) - Y2-5 (BGND)
|
G - P
|
Passenger side buckle switch line
|
Ignition switch ON, buckle switch ON
|
0.12 to 0.18 A
|
|
Ignition switch ON, buckle switch OFF
|
0.4 to 0.7 mA
|
|
Y1-1 (SGD1) - Y2-3 (GND)
|
G - W-B
|
Front occupant detection sensor LH ground line
|
Always
|
Below 1 Ω
|
|
Y1-2 (SGD2) - Y2-3 (GND)
|
O - W-B
|
Front occupant detection sensor RH ground line
|
Always
|
Below 1 Ω
|
|
Y1-3 (SGD3) - Y2-3 (GND)
|
W - W-B
|
Rear occupant detection sensor LH ground line
|
Always
|
Below 1 Ω
|
|
Y1-4 (SGD4) - Y2-3 (GND)
|
BR - W-B
|
Rear occupant detection sensor RH ground line
|
Always
|
Below 1 Ω
|
|
Y1-11 (SVC1) - Y1-1 (SGD1)
|
R - G
|
Front occupant detection sensor LH power supply line
|
Ignition switch ON, load is applied to front occupant detection sensor
LH
|
4.5 to 5.1 V
|
|
Y1-12 (SVC2) - Y1-2 (SGD2)
|
W - O
|
Front occupant detection sensor RH power supply line
|
Ignition switch ON, load is applied to front occupant detection sensor
RH
|
4.5 to 5.1 V
|
|
Y1-5 (SVC3) - Y1-3 (SGD3)
|
GR - W
|
Rear occupant detection sensor LH power supply line
|
Ignition switch ON, load is applied to rear occupant detection sensor
LH
|
4.5 to 5.1 V
|
|
Y1-6 (SVC4) - Y1-4 (SGD4)
|
V - BR
|
Rear occupant detection sensor RH power supply line
|
Ignition switch ON, load is applied to rear occupant detection sensor
RH
|
4.5 to 5.1 V
|
|
Y1-7 (SIG1) - Y1-1 (SGD1)
|
P - G
|
Front occupant detection sensor LH signal line
|
Ignition switch ON, load is applied to front occupant detection sensor
LH
|
Pulse generation
|
|
Y1-8 (SIG2) - Y1-2 (SGD2)
|
L - O
|
Front occupant detection sensor RH signal line
|
Ignition switch ON, load is applied to front occupant detection sensor
RH
|
Pulse generation
|
|
Y1-9 (SIG3) - Y1-3 (SGD3)
|
Y - W
|
Rear occupant detection sensor LH signal line
|
Ignition switch ON, load is applied to rear occupant detection sensor
LH
|
Pulse generation
|
|
Y1-10 (SIG4) - Y1-4 (SGD4)
|
B - BR
|
Rear occupant detection sensor RH signal line
|
Ignition switch ON, load is applied to rear occupant detection sensor
RH
|
Pulse generation
|
