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 -200.0 to +200.0 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 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.
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.
Hybrid/EV Control Module High Voltage Circuit	-	Varies	Indicates the hybrid battery high voltage circuit status
Ignition 1 Signal	-	Varies	This parameter displays the voltage of the ignition feed circuit of the hybrid powertrain control module.
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 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.