P1B0F

DTC P1B0F or P1B10

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P1B0F
- Drive Motor 1 Position Learn Incorrect

DTC P1B10
- Drive Motor 2 Position Learn Incorrect

Circuit/System Description

The drive motor generator position sensor is monitored by the motor control module (MCM). The MCM monitors the angular position, speed and direction of the drive motor generator based upon the signals of the resolver-type position sensor. The position sensor (or resolver) contains a drive coil, two driven coils and an irregular shaped metallic rotor. The metallic rotor is mechanically attached to the shaft of the drive motor generator. At ignition ON, the MCM outputs a 5 volt ac, 10 kHz excitation signal to the drive coil. The drive coil excitation signal creates a magnetic field surrounding the two driven coils and the irregular shaped rotor. The MCM then monitors the two driven coil circuits for a return signal. The position of the irregular shaped metallic rotor causes the magnetically-induced return signals of the driven coils to vary in size and shape. A comparison of the two driven coils signals allows the MCM to determine the exact angle, speed and direction of the drive motor generator.

Offset is the relationship between the position sensor and the drive motor generator output shaft. When the ignition is cycled to OFF, the MCM attempts to learn the offset of the drive motor position sensor. At ignition ON the MCM monitors the identification information broadcast by the transmission control module (TCM) in order to detect possible transmission replacement after the position sensor offset was last learned.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

The MCM has lost communication with the TCM and the stored identification information is valid indicating the MCM cannot confirm TCM replacement status.

Action Taken When the DTC Sets

P1B10 and P1B0F are Type C DTCs.

Conditions for Clearing the DTC

P1B10 and P1B0F are Type C DTCs.

Circuit/System Verification

1. Clear the DTC information.
2. Turn the ignition OFF for 1 minute.
3. Turn the ignition ON.
4. Retest for DTCs P1B10 or P1B0F.

Circuit/System Testing

1. Confirm the transmission control module is communicating with the scan tool.

^ If the TCM does not communicate refer to DTC U0100-U0299 (HP2) DTC U0100-U0299 (Except HP2). U0100

2. Ignition OFF, wait 2 minutes.
3. Ignition ON, monitor DTC Status. DTC P1B10 and P1B0F should have passed last test.

^ If the DTC has passed, clear DTC Information. No further diagnosis is necessary.
^ If the DTC resets, program the PIM with the latest software version and recheck for DTCs. If the DTC resets after programming or if the PIM already contains the latest software version, replace the PIM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests