| Table 1: | Accessory DC Power Control Module Scan Tool Data Parameters |
| Table 2: | Accessory DC Power Control Module Scan Tool Output Controls |
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 Accessory DC Power Control Module Scan Tool Data Parameters list only after the following is determined:
| • | The Diagnostic Trouble Code (DTC) List - 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.
Important: 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.
Parameter | System State | Expected Value | Description |
|---|---|---|---|
Operating Conditions: Engine Idling/Radiator Hose Hot/Closed Throttle/Park or Neutral/Closed Loop/Accessories OFF, unless otherwise noted | |||
12V Circuit Current | Maximum Accessory Load | Near 150 A | This parameter displays the actual current flow of the low voltage (12V) conversion circuit. The Accessory DC Power Control Module (APM) will stop conversion at current greater than 175A. The parameter display range is 0-255 Amps. |
12V Circuit Voltage | Maximum Accessory Load | 15.5V | This parameter displays the actual voltage of the low voltage (12V) conversion circuit. The parameter display range is 0-25.5V. |
12V Conditions Met | -- | Yes | This parameter displays if sufficient battery voltage is available at the accessory DC power control module (APM) 12V conversion circuit to begin high voltage to low voltage power conversion. Yes is displayed when the APM detects the minimum amount of voltage at the 12V conversion circuit necessary to enable low voltage power conversion. The parameter display range is Yes, No. |
12V Enable Command | -- | On | This parameter displays the commanded state of the low voltage (12V) conversion circuit of the accessory dc power control module (APM). The hybrid powertrain control module (HPCM) commands the APM to perform voltage conversion when conditions are acceptable. On is displayed when the APM has received the low voltage circuit (12V) conversion enable command from the HPCM. The APM converts high voltage (300V) to low voltage (12V) and supplies current on the low voltage (12V) circuit in order to support the 12V electrical system loads and also to charge the accessory battery. The parameter display range is On, Off. |
300V Charge Command | -- | Off | This parameter displays the commanded state of the high voltage (300V) conversion circuit of the accessory DC power control module (APM). The APM is capable of converting high current, low voltage on the 12V electrical system into high voltage, low current on the 300V electrical system. This process occurs only during the Jump Assist service operation and requires the assistance of an off-vehicle 12V source such as a battery charger. On is displayed when the APM has received the Jump Assist enable command from the hybrid powertrain control module (HPCM) via the scan tool. The parameter display range is On, Off. |
42V Circuit Current | Maximum Steering Load | 30A | This parameter displays the actual current flow of the intermediate voltage (42V) conversion circuit. The Accessory DC Power Control Module (APM) will stop conversion at current greater than 50A. The parameter display range is 0-255 Amps. |
42V Circuit Maximum | -- | Varies | This parameter displays the maximum voltage of the intermediate voltage (42V) conversion circuit observed during the current ignition cycle. The parameter display range is 0-255V. |
42V Circuit Temperature | -- | Near DMCM Coolant Temperature | This parameter displays the temperature of the intermediate voltage (42V) conversion circuit terminal. The parameter display range is -40°C to +215°C (-40°F to +419°F). |
42V Circuit Voltage | Maximum Steering Load | 42V | This parameter displays the actual voltage of the intermediate voltage (42V) conversion circuit. The parameter display range is 0-255V. |
42V Enable Command | -- | On | This parameter displays the commanded state of the intermediate voltage (42V) conversion circuit. The hybrid powertrain control module (HPCM) commands the APM to perform voltage conversion when conditions are acceptable. On is displayed when the APM has received the intermediate voltage circuit (42V) conversion enable command from the HPCM. The APM converts high voltage (300V) to intermediate voltage (42V) and supplies current on the intermediate voltage (42V) circuit in order to support the power steering system. The parameter display range is On, Off. |
42V Temperature Status | -- | OK | This parameter displays the temperature status of the intermediate voltage (42V) conversion circuit. The parameter display range is OK, Power Limit, Overtemp Reduced Performance, Overtemp Shutdown. |
APM 300V Circuit Current | -- | Varies | This parameter displays the high voltage circuit current. This parameter is in-active during Jump Assist. The parameter display range is 0 to 1638.35 Amps. |
APM Heat Plate Temperature | -- | Near DMCM Coolant Temperature | This parameter displays the temperature of the electronics cooling surface that is shared by the accessory dc power control module (APM) and the drive motor generator power inverter module assembly (PIM). The parameter display range is -40°C to +215°C (-40°F to +419°F). |
APM Set Point | Maximum Accessory Load | Near 100% | This parameter displays the low voltage (12V) conversion circuit output as a duty cycle percentage. The APM receives the Low Voltage (12V) output request from the hybrid powertrain control module (HPCM). The HPCM receives a low voltage (12V) voltage output request from the body control module (BCM). The BCM monitors conditions such as 12 volt battery temperature and current flow and requests a specific voltage be maintained. 100% is displayed when the APM is requested to deliver the maximum possible voltage to the low voltage (12V) circuit. The parameter display range is 0 to 100%. |
HPCM 300V Circuit | -- | Varies | This parameter displays the high voltage circuit voltage as determined by the hybrid powertrain control module (HPCM). The parameter display range is 0-655.35V. |
Output Control | Description | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Intermediate Voltage Control |
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Low Voltage Control |
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Jump Assist |
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