DTC B1048:11 [BCM]

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Malfunction Location

• Brake fluid level sensor circuit malfunction

Detection Condition

• Short to ground in brake fluid level sensor circuit with the brake fluid amount on the upper side of the minimum

Possible Causes

• Short circuit to ground in wiring harness between brake fluid level sensor connector terminal A and BCM connector terminal 1Q

• Brake fluid level sensor malfunction

• BCM malfunction

System Wiring Diagram

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Diagnostic Procedure

Step

Inspection

Action

1

PERFORM DTC INSPECTION

•  Clear DTCs using the M-MDS.
(See CLEARING DTC [BCM].)

•  Perform the BCM DTC inspection using the M-MDS with the brake fluid amount on the upper side of the minimum.
(See DTC INSPECTION [BCM].)

•  Is DTC B1048:11 displayed?

Yes

Go to the next step.

No

DTC troubleshooting completed.

2

INSPECT BRAKE FLUID LEVEL SENSOR CONNECTOR CONDITION

•  Switch the ignition to off.

•  Disconnect the negative battery cable.

•  Disconnect the brake fluid level sensor connector.

•  Inspect the connector and terminals (corrosion, damage, pin disconnection).

•  Is the connector normal?

Yes

Go to the next step.

No

Repair/replace the connector or terminal.

After repair procedure, go to Step 6.

3

INSPECT BRAKE FLUID LEVEL SENSOR

•  Inspect the brake fluid level sensor.
(See BRAKE FLUID LEVEL SENSOR INSPECTION.)

•  Is the brake fluid level sensor normal?

Yes

Go to the next step.

No

Replace the brake fluid level sensor.

After replacement, go to Step 6.

4

INSPECT BCM CONNECTOR CONDITION

•  Disconnect the BCM connector.

•  Inspect the connector and terminals (corrosion, damage, pin disconnection).

•  Is the connector normal?

Yes

Go to the next step.

No

Repair/replace the connector or terminal.

After repair procedure, go to Step 6.

5

INSPECT BRAKE FLUID LEVEL SENSOR CIRCUIT FOR SHORT CIRCUIT TO GROUND

•  Inspect for continuity between brake fluid level sensor connector terminal A and body ground.

•  Is there continuity?

Yes

Repair/replace the wiring harness.

After repair procedure, go to the next step.

No

Go to the next step.

6

VERIFY DTC

•  Reconnect the disconnected connectors and the negative battery cable.

•  Clear DTCs using the M-MDS.
(See CLEARING DTC [BCM].)

•  Perform the BCM DTC inspection using the M-MDS with the brake fluid amount on the upper side of the minimum.
(See DTC INSPECTION [BCM].)

•  Is the same DTC present?

Yes

Repeat the inspection from Step 1.

If the malfunction recurs, replace the BCM.

(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)

Go to the next step.

No

Go to the next step.

7

VERIFY THAT NO OTHER DTCs ARE PRESENT

•  Are there other DTCs output?

Yes

Perform the corresponding DTC inspection.

No

DTC troubleshooting completed.

Step	Inspection		Action
1	PERFORM DTC INSPECTION • Clear DTCs using the M-MDS. (See CLEARING DTC [BCM].) • Perform the BCM DTC inspection using the M-MDS with the brake fluid amount on the upper side of the minimum. (See DTC INSPECTION [BCM].) • Is DTC B1048:11 displayed?	Yes	Go to the next step.
1		No	DTC troubleshooting completed.
2	INSPECT BRAKE FLUID LEVEL SENSOR CONNECTOR CONDITION • Switch the ignition to off. • Disconnect the negative battery cable. • Disconnect the brake fluid level sensor connector. • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Is the connector normal?	Yes	Go to the next step.
2		No	Repair/replace the connector or terminal. After repair procedure, go to Step 6.
3	INSPECT BRAKE FLUID LEVEL SENSOR • Inspect the brake fluid level sensor. (See BRAKE FLUID LEVEL SENSOR INSPECTION.) • Is the brake fluid level sensor normal?	Yes	Go to the next step.
3		No	Replace the brake fluid level sensor. After replacement, go to Step 6.
4	INSPECT BCM CONNECTOR CONDITION • Disconnect the BCM connector. • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Is the connector normal?	Yes	Go to the next step.
4		No	Repair/replace the connector or terminal. After repair procedure, go to Step 6.
5	INSPECT BRAKE FLUID LEVEL SENSOR CIRCUIT FOR SHORT CIRCUIT TO GROUND • Inspect for continuity between brake fluid level sensor connector terminal A and body ground. • Is there continuity?	Yes	Repair/replace the wiring harness. After repair procedure, go to the next step.
5		No	Go to the next step.
6	VERIFY DTC • Reconnect the disconnected connectors and the negative battery cable. • Clear DTCs using the M-MDS. (See CLEARING DTC [BCM].) • Perform the BCM DTC inspection using the M-MDS with the brake fluid amount on the upper side of the minimum. (See DTC INSPECTION [BCM].) • Is the same DTC present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the BCM. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.) Go to the next step.
6		No	Go to the next step.
7	VERIFY THAT NO OTHER DTCs ARE PRESENT • Are there other DTCs output?	Yes	Perform the corresponding DTC inspection.
7		No	DTC troubleshooting completed.