DTC Troubleshooting: C0049-7B
DTC C0049-7B: Brake Fluid Level Too Low
NOTE:
Bleeding the brake system while turn the vehicle to the ON mode can cause this DTC.
Before you troubleshoot, review the general troubleshooting information.

DTC Description
DTC
Freeze Frame
C0049-7B Brake Fluid Level Too Low
    

1.
Brake fluid level check:

Brake fluid level check
?1.
Check the brake fluid level in the master cylinder reservoir.

Is the brake fluid level OK?

     
YES
     
     
     
Go to step 2.
     
NO
     
     
     
Check for worn brake pads or brake fluid leaks.
Inspect the brake lines and hoses for leaks, and repair as needed.?
Inspect the brake pads and replace worn out brake pads.?
Inspect the rear drum brake.?
Add brake fluid and recheck.?
2.
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 start the engine.

?4.
Wait 60 seconds or more.

?5.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
C0049-7B Brake Fluid Level Too Low
    

Is DTC C0049-7B indicated?

     
YES
     
     
     
The failure is duplicated. Go to step 3.
     
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.?
3.
Gauge control module check 1:

Gauge control module check 1
?1.
Release the parking brake.

?2.
Turn the vehicle to the OFF (LOCK) mode, then start the engine.

?3.
Wait 60 seconds or more.

?4.
Check the brake system indicator in the gauge control module.

Does the indicator come on, then go off?

     
YES
     
     
     
Go to step 7.
     
NO
     
     
     
Go to step 4.
4.
Gauge control module check 2:

Gauge control module check 2
?1.
Check the parameter(s) below with the HDS.
Signal
Current conditions
Values
Unit
BRAKE FLUID LEVEL
    

Does the HDS indicate ENOUGH?

     
YES
     
     
     
     
NO
     
     
     
Go to step 5.
5.
Brake fluid level switch check:

Brake fluid level switch check
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
Brake fluid level switch 2P connector

?3.
Turn the vehicle to the ON mode.

?4.
Check the parameter(s) below with the HDS.
Signal
Current conditions
Values
Unit
BRAKE FLUID LEVEL
    

Does the HDS indicate ENOUGH?

     
YES
     
     
     
     
NO
     
     
     
Go to step 6.
6.
Shorted wire check (BRAKE LEVEL SW line):

Shorted wire check (BRAKE LEVEL SW line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
Gauge control module 32P connector

?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Brake fluid level switch 2P connector: disconnected
 
Gauge control module 32P connector: disconnected
Test point 1
Brake fluid level switch 2P connector No. 1
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short to body ground in the wire between the gauge control module and the brake fluid level switch.?
     
NO
     
     
     
The BRAKE LEVEL SW wire is OK. Replace the gauge control module.?
7.
VSA modulator-control unit check (update):

VSA modulator-control unit check (update)
?1.
Update the VSA modulator-control unit if it does not have the latest software.

?2.
Turn the vehicle to the OFF (LOCK) mode, then start the engine.

?3.
Wait 60 seconds or more.

?4.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
     

Is DTC C0049-7B indicated?

     
YES
     
     
     
Check for loose terminals and poor connections in the VSA modulator-control unit 38P connector. If the VSA modulator-control unit was updated and the symptom/indication is still present, replace the VSA modulator-control unit.?
     
NO
     
     
     
Troubleshooting is complete. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.?