DTC Troubleshooting: C1650-12
DTC C1650-12: Left-Front Acceleration Sensor Upper Limit Abnormality
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
DTC
Freeze Frame
C1650-12 Left-Front Acceleration Sensor Upper Limit Abnormality
    

1.
Problem verification:

Problem verification
?1.
Turn the vehicle to the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Turn the vehicle to the OFF (LOCK) mode, then to the ON mode.

?4.
Wait for 60 seconds or more.

?5.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
C1650-12 Left-Front Acceleration Sensor Upper Limit Abnormality
    

Is DTC C1650-12 indicated?

     
YES
     
     
     
The failure is duplicated. Go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.?
2.
Left-rear acceleration sensor performance check:

Left-rear acceleration sensor performance check
?1.
Check the parameter(s) below with the HDS.
Signal
Current conditions
Values
Unit
Left Rear Acceleration Sensor Voltage
    

Is there about 5 V?

     
YES
     
     
     
Repair an open in the wire between the adaptive damper control unit and the front acceleration sensor.?
     
NO
     
     
     
Go to step 3.
3.
Front acceleration sensor check:

Front acceleration sensor check
?1.
Check the front acceleration sensor.

Is the front acceleration sensor OK?

     
YES
     
     
     
Go to step 4.
     
NO
     
     
     
4.
Shorted wire check (ADS FR R G line to power):

Shorted wire check (ADS FR R G line to power)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connectors.
Adaptive damper control unit 24P connector
Front acceleration sensor 3P connector

?3.
Turn the vehicle to the ON mode.

?4.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
 
Adaptive damper control unit 24P connector: disconnected
 
Front acceleration sensor 3P connector: disconnected
Test point 1
Adaptive damper control unit 24P connector No. 14
Test point 2
Body ground

Is there about 5 V or more?

     
YES
     
     
     
Repair a short to power in the wire between the adaptive damper control unit and the front acceleration sensor.?
     
NO
     
     
     
The ADS FR R G wire is OK. Go to step 5.
5.
Open wire check (ADS SG line):

Open wire check (ADS SG line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Adaptive damper control unit 24P connector: disconnected
 
Front acceleration sensor 3P connector: disconnected
Test point 1
Adaptive damper control unit 24P connector No. 15
Test point 2
Front acceleration sensor 3P connector (female terminals) No. 2:


Is there continuity?

     
YES
     
     
     
The ADS SG wire is OK. Check for loose terminals and poor connections in the adaptive damper control unit 24P connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the adaptive damper control unit.?
     
NO
     
     
     
Repair an open in the wire between the adaptive damper control unit and the front acceleration sensor.?