B251B

B251B-LEFT REAR WINDOW - INCORRECT DIRECTION







- When Monitored:
Whenever the Left Rear Window Motor starts to rotate.

- Set Condition:
When the Left Rear Window Motor Sensor detects that it is starting to go in the opposite direction of the command, this code will set.





1. TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, record and erase the DTCs.
3. Operate left rear windows up and down several times (if possible).
4. With the scan tool, read the DTCs.

Does the scan tool display B251B-LEFT REAR WINDOW - INCORRECT DIRECTION?

Yes

- Go To 2

No

- The condition that caused this symptom is currently not present. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. (Q307) LEFT REAR WINDOW HALL SENSOR A SIGNAL CIRCUIT OPEN




1. Turn the ignition off.
2. Disconnect the Left Rear Window Motor connector.
3. Disconnect the Power Top Control Module C1 connector.
4. Measure the resistance of the (Q307) Left Rear Window Hall Sensor A Signal circuit between the PTCM C1 connector (cavity 7) and the Motor connector (cavity 5).

Is the resistance below 2.0 Ohms?

No

- Repair the (Q307) Left Rear Window Hall Sensor A Signal circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

Yes

- Go To 3

3. (Q309) LEFT REAR WINDOW HALL SENSOR B SIGNAL CIRCUIT OPEN




1. Measure the resistance of the (Q309) Left Rear Window Hall Sensor B Signal circuit between the PTCM C1 connector (cavity 9) and the Motor connector (cavity 2).

Is the resistance below 2.0 Ohms?

No

- Repair the (Q309) Left Rear Window Hall Sensor B Signal circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

Yes

- Go To 4

4. (Q309) LEFT REAR WINDOW HALL SENSOR B SIGNAL CIRCUIT CROSSED WITH THE (Q307) LEFT REAR WINDOW HALL SENSOR A SIGNAL CIRCUIT




1. Measure the resistance between the (Q309) Left Rear Window Hall Sensor B Signal circuit in the PTCM C1 connector (cavity 9) and the (Q307) Left Rear Window Hall Sensor A Signal circuit in the Motor connector (cavity 5).

Is the resistance below 10k Ohms?

Yes

- Correct the crossed wiring between the (Q309) Left Rear Window Hall Sensor B Signal circuit and the (Q307) Left Rear Window Hall Sensor A Signal circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 5

5. (Q111) LEFT REAR WINDOW DRIVER (UP) CIRCUIT CROSSED WITH THE (Q211) LEFT REAR WINDOW DRIVER (DOWN) CIRCUIT




1. Disconnect the Power Top Control Module C2 connector.
2. Measure the resistance between the (Q111) Left Rear Window Driver (Up) circuit in the PTCM C2 connector (cavity 14) and the (Q211) Left Rear Window Driver (Down) circuit in the motor connector (cavity 3).

Is the resistance below 10k Ohms?

Yes

- Correct the crossed wiring between the (Q111) Left Rear Window Driver (Up) circuit and the (Q211) Left Rear Window Driver (Down) circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the window motor.
- Perform the BODY VERIFICATION TEST. Body Verification Test.