Drive Motor Control Module Scan Tool Information
WARNING: This page is about a different car, the 2015 Buick LaCrosse. However, it is still accessible from the selected car via links, so may be relevant.
The drive motor control module is a non-serviceable module within the generator control module. The Drive Motor Control Module Scan Tool Data Parameters list contains hybrid controls-related parameters. The list is arranged in alphabetical order.
Use the Drive Motor Control Module Scan Tool Data Parameters list only after the following is determined:
- The Diagnostic System Check - Vehicle is completed.
- No diagnostic trouble codes (DTCs)
- On-board diagnostics are functioning properly
The scan tool values from a properly running vehicle may be used for comparison with the vehicle you are diagnosing. The Drive Motor Control Module Scan Tool Data Parameters list represents values that would be seen on a normally running vehicle.
NOTE:
A scan tool that displays faulty data should not be used. The scan tool concern should be reported to the manufacturer. Use of a faulty scan tool can result in misdiagnosis and unnecessary parts replacement.
Only the parameters listed below are referenced in this service manual for use in diagnosis. If all values are within the typical range described below, refer to Symptoms - Hybrid Controls for diagnosis.
Drive Motor Control Module Scan Tool Data Parameters
| Parameter | System State | Expected Value | Description |
|---|---|---|---|
| Operating Conditions: Ignition ON/Closed Throttle/Park or Neutral/Accessories OFF, unless otherwise noted | |||
| Brake Pedal Position Circuit Signal | Released / Applied | Released | This parameter displays the undefaulted state of brake pedal travel beyond a top of travel threshold. This signal is based upon the state of the redundant brake switch. |
| Calculated Drive Motor Rotor Temperature | °C (°F) | Varies | This parameter displays the calculated/modeled rotor temperature for the drive motor. |
| Calculated Throttle Position | % | 0 | This parameter displays the accelerator effective position, which represents the driver's intended request for torque or acceleration. It is determined from the maximum of the driver requests to open the throttle (e.g., accelerator pedal, cruise control, PTO, etc.) and is normalized to 0 to 100%, where 0% represents an idle or coast request and 100% represents a request for wide open throttle (WOT). It is the primary indication of accelerator position / throttle position used by transmission control algorithms and, thus, is often referred to as transmission throttle position. In the event that the engine is operating in a forced idle mode due to an accelerator pedal position fault, the accelerator effective position will have a value of 0%, corresponding to an idle request. |
| Drive Motor Control Module Negative Supply Isolation Voltage | Volts | 56 | This parameter displays the high voltage negative to chassis voltage as measured for the drive motor. This value will vary based on hybrid battery voltage level. |
| Drive Motor Control Module Positive Supply Isolation Voltage | Volts | 58 | This parameter displays the high voltage positive to chassis voltage as measured for the drive motor. This value will vary based on hybrid battery voltage level. |
| Drive Motor Control Module Temperature Sensor 1 | °C (°F) | Varies | This parameter displays the drive motor control module Insulated Gate Bipolar Transistor temperature 1 as measured by a sensor. |
| Drive Motor Control Module Temperature Sensor 2 | °C (°F) | Varies | This parameter displays the drive motor control module Insulated Gate Bipolar Transistor temperature 2 as measured by a sensor. |
| Drive Motor Control Module Temperature Sensor 3 | °C (°F) | Varies | This parameter displays the drive motor control module Insulated Gate Bipolar Transistor temperature 3 as measured by a sensor. |
| Drive Motor Current | Amps | Varies | This parameter displays the DC current consumed by the drive motor. This could display a negative or positive value. A negative value equals charging. |
| Drive Motor Inverter Status | Power Stage Inactive; Power Stage Active; Power Stage On: Shutdown Pending; Power Stage On: Active Discharge; Reserved; High Voltage Required | Active | This parameter displays the state of the Drive Motor Inverter. |
| Drive Motor Inverter Supply Voltage Circuit | Volts | 114 | This parameter displays the voltage on the DC bus at the inverter for the drive motor. This value will vary based on hybrid battery voltage level. |
| Drive Motor Phase U Current | Amps | Varies | This parameter displays the current flow to phase U of the drive motor. |
| Drive Motor Phase V Current | Amps | Varies | This parameter displays the calculated current flow to phase V of the drive motor. |
| Drive Motor Phase W Current | Amps | Varies | This parameter displays the current flow to phase W of the drive motor. |
| Drive Motor Position Sensor Offset Learn Status | Not Run This Power Cycle; Successful Learn This Power Cycle; Failure for Electric Motor Speed Not Zero; Failure for High Voltage Too Low; Failure for Incorrect Motor Current | Not Run | This parameter displays the current status of the resolver offset learn (ROL) for the drive motor. This parameter will update based on any ROL, whether performed automatically as part of normal vehicle operation or as the result of a device control. |
| Drive Motor Speed | RPM | 1800 | This parameter displays the speed, in revolutions per minute, of the drive motor as determined from the resolver. This value changes with motor speed. |
| Drive Motor Temperature | °C (°F) | Varies | This parameter displays the temperature for the drive motor. |
| Drive Motor Torque | Y (lb ft) | Varies | This parameter displays the torque value for the drive motor. |
| Drive Motor Torque Command | Y (lb ft) | Varies | This parameter displays the commanded torque value requested by the drive motor control module. |
| ECT Sensor | °C (°F) | Varies | This parameter displays the undefaulted engine coolant temperature measured by a sensor. |
| Engine Speed | RPM | Varies | This parameter displays the undefaulted engine speed determined from the low resolution (LORES) period of the crank position sensor. |
| Hybrid/EV Battery Pack Charge Remaining | % | Varies | This parameter displays the remaining charge for the Hybrid Battery Pack. |
| Hybrid Powertrain Control Module High Voltage Circuit | Volts | 114 | This parameter displays the high voltage circuit voltage as detected by the hybrid powertrain control module. This value will vary based on hybrid battery voltage level. |
| Ignition 1 Signal | Volts | 14.5 | Run/Crank Voltage |
| Power Mode | Off; Accessory; Run; Crank Request | Run | This parameter displays system power mode status as determined by ignition switch inputs to the power mode master. System power mode status should match the ignition switch position. |
| Torque Delivered Signal | Y (lb ft) | Varies | Engine Actual Steady State Torque |