TERMINALS OF ECU
1. CHECK OCCUPANT CLASSIFICATION ECU
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
a9-1 (+B) - a9-3 (GND) |
W - W-B |
Battery power supply |
Always |
11 to 14 V |
a9-2 (DIA) - a9-3 (GND) |
GR - W-B |
Diagnosis (DLC3) |
Ignition switch ON |
Pulse generation |
a9-3 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 V |
a9-4 (FSR-) - a9-3 (GND) |
LG - W-B |
Center airbag sensor assembly communication line |
Always |
Below 1 V |
a9-5 (BGND) - a9-3 (GND) |
P - W-B |
Front passenger side buckle switch ground line |
Always |
Below 1 V |
a9-7 (IG2) - a9-3 (GND) |
B - W-B |
Ignition switch power supply |
Ignition switch ON |
11 to 14 V |
a9-8 (FSR+) - a9-4 (FSR- ) |
L - LG |
Center airbag sensor assembly communication line |
Ignition switch ON |
Pulse generation |
a9-9 (BSW) - a9-5 (BGND) |
G - P |
Front passenger side buckle switch line |
Always |
Pulse generation |
a10-1 (SGD1) - a9-3 (GND) |
G - W-B |
Front occupant classification sensor LH ground line |
Always |
Below 1 V |
a10-2 (SGD2) - a9-3 (GND) |
LG - W-B |
Front occupant classification sensor RH ground line |
Always |
Below 1 V |
a10-3 (SGD3) - a9-3 (GND) |
W - W-B |
Rear occupant classification sensor LH ground line |
Always |
Below 1 V |
a10-4 (SGD4) - a9-3 (GND) |
BR - W-B |
Rear occupant classification sensor RH ground line |
Always |
Below 1 V |
a10-11 (SVC1) - a10-1 (SGD1) |
R - G |
Front occupant classification sensor LH power supply line |
Ignition switch ON, load applied to front occupant classification sensor LH |
4.9 to 5.1 V |
a10-12 (SVC2) - a10-2 (SGD2) |
W - LG |
Front occupant classification sensor RH power supply line |
Ignition switch ON, load applied to front occupant classification sensor RH |
4.9 to 5.1 V |
a10-5 (SVC3) - a10-3 (SGD3) |
GR - W |
Rear occupant classification sensor LH signal line |
Ignition switch ON, load applied to rear occupant classification sensor LH |
4.9 to 5.1 V |
a10-6 (SVC4) - a10-4 (SGD4) |
V - BR |
Rear occupant classification sensor RH signal line |
Ignition switch ON, load applied to rear occupant classification sensor RH |
4.9 to 5.1 V |
a10-7 (SIG1) - a10-1 (SGD1) |
P - G |
Front occupant classification sensor LH signal line |
Ignition switch ON, load applied to front occupant classification sensor LH |
0 to 5.1 V |
a10-8 (SIG2) - a10-2 (SGD2) |
L - LG |
Front occupant classification sensor RH signal line |
Ignition switch ON, load applied to front occupant classification sensor RH |
0 to 5.1 V |
a10-9 (SIG3) - a10-3 (SGD3) |
SB - W |
Rear occupant classification sensor LH power supply line |
Ignition switch ON, load applied to rear occupant classification sensor LH |
0 to 5.1 V |
a10-10 (SIG4) - a10-4 (SGD4) |
B - BR |
Rear occupant classification sensor RH power supply line |
Ignition switch ON, load applied to rear occupant classification sensor RH |
0 to 5.1 V |
Lost Communication with A/C ECU (U0164)
DESCRIPTION
DTC Code
DTC Detection Condition
Trouble Area
U0164
There is no communication from the air conditioning amplifier assembly.
Power source or inside air conditioning ...
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use these procedures to troubleshoot the automatic running board system.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
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