Accessory DC Power Control Module Scan Tool Information
The accessory DC power control module is also referred to as the 14 volt power module. The Accessory DC Power Control Module Scan Tool Data Parameters list contains hybrid controls-related parameters. The list is arranged in alphabetical order.
Use the 14V Power 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 Accessory DC Power 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.
14 Volt Power Module Scan Tool Data Parameters
| Parameter | System State | Expected Value | Description |
|---|---|---|---|
| Operating Conditions: Vehicle ON/Closed Throttle/Park or Neutral/Accessories OFF, unless otherwise noted | |||
| 14V Power Module High Voltage Circuit Current | - | Varies | Indicates the high voltage circuit current as detected by the accessory dc power control module. The range is from -1638.4 to +1638.35 Amps. This is an indication of the power being consumed by the module. |
| 14V Power Module Power Loss | - | Varies | The accessory DC power control module converts high voltage (300V) direct current (DC) to low voltage (12V) DC for accessory electrical operation and to charge the 12 volt battery. This parameter indicates the difference in power (power loss) between the input power and the output power of the Accessory Power Module. The power loss is determined based upon High Voltage current and voltage, Low Voltage current and voltage, and Intermediate Voltage current and voltage measurements from the accessory power module internal sensors. |
| 14V Power Module Setpoint | - | Varies | This is the target, expressed in percent, the accessory DC power control module will try to maintain while operating the system. |
| 14V Power Module Setpoint | - | Varies | This is the target voltage the accessory DC power control module will try to maintain while operating the system. |
| 14V Power Module Status | - | Varies | This contains the control status of the accessory DC power control module as determined by the Body Control Module. |
| 14V Power Module Temperature Sensor 1 | - | Varies | Indicates the temperature of the accessory DC power control module at temperature sensor 1. |
| 14V Power Module Temperature Sensor 2 | - | Varies | Indicates the temperature of the accessory DC power control module at temperature sensor 2. |
| Drive Motor 1 Inverter Status | - | Varies | Indicates the status of Drive Motor Generator 1 Motor Control Module. |
| Drive Motor 2 Inverter Status | - | Varies | Indicates the status of Drive Motor Generator 2 Motor Control Module. |
| ECT Sensor | - | Varies | Indicates the temperature of engine coolant temperature sensor. |
| High Voltage Circuit Enable Command | - | Varies | Indicates if the drive motor battery charger has requested the assistance of the accessory DC power control module in charging the 12V accessory battery. |
| Hybrid Powertrain Control Module High Voltage Circuit | - | Varies | This displays the high voltage circuit voltage as detected by the hybrid powertrain control module which detects voltage in a range from 0-655.35 V. |
| Hybrid/EV Battery Pack Current | - | Varies | Indicates the hybrid battery current measured on the high voltage bus. A negative current value indicates a battery charge while a positive current value indicates a battery discharge. |
| Hybrid/EV Battery Pack State of Charge | - | Varies | Indicates the hybrid battery State Of Charge as calculated by the ECM. |
| IAT Sensor | - | Varies | Indicates the temperature of engine intake air temperature sensor. |
| Ignition 1 Signal | - | Varies | This parameter displays the voltage of the ignition feed circuit of the hybrid powertrain control module. |
| Ignition Input Accessory | - | Varies | Indicates that the accessory hardwire input to the controller is active. |
| Ignition Input Off/On/Start | - | Varies | Displays the voltage of the off/run/crank signal from the ignition switch. |
| Low-Voltage Circuit Current | - | Varies | Indicates the amount of current supplied to the 12 volt battery as detected by the accessory DC power control module. |
| Low-Voltage Circuit Enable Command | - | Varies | Indicates if the low voltage circuit is enabled. |
| Low-Voltage Circuit Enable Conditions Met | - | Varies | Indicates that the required minimum voltage is present at the APM 14 volt terminal prior to enabling output. |
| Low-Voltage Circuit Voltage | - | Varies | Indicates the actual voltage of the low voltage (14V) circuit as detected by the accessory DC power control module. The range is from 0-25.5 V. |
14V Power Module
| Control Functions | Description |
|---|---|
| 14V Power Module Set Point |
|