Dodge Nitro. Manual — part 150

Fig. 2: Brake Fluid Level Switch
Courtesy of CHRYSLER LLC

Turn the ignition off.

2007 Dodge Nitro R/T

2007 BRAKES ABS - Electrical Diagnostics - Nitro

Connect a jumper wire between the (B20) Brake Fluid Level signal circuit and the (Z905) Brake Fluid
Level ground circuit in the Brake Fluid Level Switch harness connector

Turn the ignition on.

With the scan tool, read the Brake Fluid Level Switch voltage

Is the voltage below 1.0 volt?

Yes

Replace the Brake Fluid Level Switch in accordance with the Service Information.

Perform ABS VERIFICATION TEST.

No

Go to 3).

3) (B20) BRAKE FLUID LEVEL SWITCH CIRCUIT OPEN

Fig. 3: Measuring Resistance Of (B20) Brake Fluid Level Signal Circuit Between Brake Fluid Level
Switch Harness Connector And TIPM Harness Connector
Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the Brake Fluid Level Switch.

2007 Dodge Nitro R/T

2007 BRAKES ABS - Electrical Diagnostics - Nitro

Disconnect the TIPM harness connector.

Measure the resistance of the (B20) Brake Fluid Level signal circuit between the Brake Fluid Level
Switch harness connector and the TIPM harness connector.

Is the resistance below 5 ohms?

Yes

Go to 4).

No

Repair the open in the (B20) Brake Fluid Level Switch signal circuit.

Perform ABS VERIFICATION TEST.

4) (Z905) SENSOR GROUND CIRCUIT OPEN

2007 Dodge Nitro R/T

2007 BRAKES ABS - Electrical Diagnostics - Nitro

Fig. 4: Measuring Resistance Of (Z905) Brake Fluid Level Switch Ground Circuit Between Brake
Fluid Level Switch Harness Connector And Ground
Courtesy of CHRYSLER LLC

Turn the ignition off.

2007 Dodge Nitro R/T

2007 BRAKES ABS - Electrical Diagnostics - Nitro