Part 1

Scan Tool Data Definitions

Hybrid Powertrain Control Module Data

VTD Module Response Status
- This parameter displays the immobilizer response status as detected by the hybrid powertrain control module (HPCM). The HPCM detects response status as NO INFO., IN PROCESS, NEGATIVE, and VALID.

VTD System Status
- This parameter displays the immobilizer system status as detected by the hybrid powertrain control module (HPCM). The HPCM detects system status as STANDBY, IMMOBILIZED AT STARTUP, IMMOBILIZED DUE TO NO RESPONSE, IMMOBILIZED DUE TO NEGATIVE RESPONSE, IMMOBILIZED DUE TO INCORRECT RESPONSE, POST RELEASE, PRE RELEASE and RELEASED.

ECT
- This parameter displays the temperature of the internal combustion engine (ICE) coolant as detected by the ECMs engine coolant temperature (ECT) sensor. The sensor detects temperature in a range from -40°C to +215°C (-40°F to +419°F).

Engine Speed
- This parameter displays the rotations per minute (rpm) of the internal combustion engine (ICE) crankshaft position sensor (CKP) as detected by the hybrid powertrain control module (HPCM). The CKP sensor signal is shared by the HPCM and the ECM. The HPCM detects rotational speed in a range from 0-16,383.75 RPM.

Vehicle Speed
- This parameter displays the vehicle speed as detected by the engine control module (ECM). The vehicle speed is detected in a range from 0-255 km/h (0-158 mph).

IAT
- This parameter displays the temperature of the internal combustion engine (ICE) intake air as detected by the ECMs intake air temperature (IAT) sensor. The sensor detects temperature in a range from -40°C to +215°C (-40°F to +419°F).

Control Module Voltage
- This parameter displays the voltage of the ignition feed circuit as detected by the hybrid powertrain control module (HPCM). The HPCM detects ignition feed circuit voltage in a range from 0- 65.535 V.

BPPS Status
- This parameter displays the status of the brake pedal as detected by the body control module (BCM). Depressed indicates a zero voltage input to the BCM, brake pedal applied. Released indicates a voltage input to the BCM, brake pedal un-applied.

Engine Run Time
- This parameter displays the elapsed internal combustion engine (ICE) run time for the current ignition cycle as detected by the engine control module (ECM). The ECM detects ICE run time in a range from 0-65,535 seconds.

Transmission OSS
- This parameter displays the rotations per minute (rpm) of the transmission output shaft as detected by the TCMs vehicle speed sensor (VSS). The sensor detects rotational speed in a range from 0-8192 RPM.

TR Sw.
- This parameter displays the transmission gear selected as detected by the TCMs internal mode switch (IMS). The IMS contains two discrete shift lever-actuated switch patterns. The IMS range switch pattern is monitored by the TCM and is utilized to determine gear range as selected by the shift lever. The IMS direction switch pattern is monitored by the hybrid powertrain control module (HPCM) and is utilized to determine vehicle direction and the Park/Neutral start safety condition as selected by the shift lever. The TR Switch parameter displays the IMS range switch inputs as PARK, REVERSE, NEUTRAL, DRIVE 4, MANUAL and INVALID.

Transfer Case Ratio
- This parameter displays the transfer case gear ratio as determined by the TCM. The TCM determines the ratio in a range from 0-3.984375.

APM Heat Plate 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) as detected by the APM. The APM internal sensor detects temperature in a range from -40°C to +215°C (-40°F to +419°F).

HPCM 300 V Circuit
- This parameter displays the high voltage circuit voltage as detected by the hybrid powertrain control module (HPCM). The HPCM detects voltage in a range from 0- 655.35 V.

APM 300 V Circuit Current
- This parameter displays the high voltage circuit current as detected by the accessory dc power control module (APM). The APM internal sensor detects current in a range from -1638.4 to +1638.35 Amps.

12V Enable Command
- This parameter displays if sufficient battery voltage is available at the accessory DC power control module (APM) 12 V output circuit to begin high voltage to low voltage power conversion. Yes is displayed when the APM detects the minimum amount of voltage at the 12 V output circuit necessary to enable low voltage power conversion.

300V AC Isolation Status
- This parameter displays the isolation status of the high voltage (HV) circuitry as detected by the battery energy control module (BECM). The BECM compares the resistance between the HV positive circuit to chassis ground and the HV negative circuit to chassis ground using an alternating current (AC) detection method. Fail is displayed if isolation resistance is detected that is less than an acceptable amount.

HPCM HVIC Status
- This parameter displays the continuity status of the high voltage interlock circuit (HVIC) as detected by each motor control module (MCM). The HVIC circuit is routed to locations where high voltage is accessible by a service technician. The processors in the power inverter module (PIM) assembly and the battery energy control module (BECM) monitor the HVIC circuit for continuity. The HVIC circuit is designed to open when access to protected high voltage components has been attempted. Fail is displayed when both MCMs detect an open HVIC circuit condition. Pass is displayed when both MCMs detect a closed HVIC circuit condition. A Fail HVIC status may cause the high voltage contactors to be commanded open.

300V DC Isolation
- This parameter displays the isolation status of the high voltage (HV) circuitry as detected by the hybrid powertrain control module (HPCM). The HPCM compares the resistance between the HV positive circuit to chassis ground and the HV negative circuit to chassis ground using a direct current (DC) detection method. Fail is displayed if isolation resistance is detected that is less than an acceptable amount.

BECM HVIC Status
- This parameter displays the continuity status of the high voltage interlock circuit (HVIC) as detected by the battery energy control module (BECM). The HVIC circuit is routed to locations where high voltage is accessible by a service technician. The processors in both the power inverter module (PIM) assembly and the battery energy control module (BECM) monitor the HVIC circuit for continuity. The HVIC circuit is designed to open when access to protected high voltage components has been attempted. The BECM monitors HVIC status when the high voltage contactor relays are closed. Fail is displayed when the BECM detects an open HVIC circuit condition. Pass is displayed when the BECM detects a closed HVIC circuit condition. Indeterminate is displayed when the BECM is not currently monitoring HVIC status. An open condition may cause the high voltage contactors to be commanded open.

BECM Maximum Voltage
- This parameter displays the maximum voltage monitored during the current ignition cycle. The hybrid battery contains many individual batteries wired in series. The battery energy control module (BECM) measures voltage across the hybrid battery modules in pairs. This display represents the maximum voltage measured at any of the module pairs. The BECM detects module pair voltage in a range from 0-25.5 V.

BECM Minimum Voltage
- This parameter displays the minimum voltage monitored during the current ignition cycle. The hybrid battery contains many individual batteries wired in series. The battery energy control module (BECM) measures voltage across the hybrid battery modules in pairs. This display represents the minimum voltage measured at any of the module pairs. The BECM detects module pair voltage in a range from 0-25.5 V.

Contactor Sys. Req. Ckt. Command
- This parameter displays the commanded pulse width modulation (PWM) of the contactor control PWM circuit. The hybrid powertrain control module (HPCM) generates a PWM signal that is monitored by the battery energy control module (BECM). The BECM monitors the PWM signal and operates the high voltage contactors relays as commanded. A 30% PWM (± 5%) is displayed when the HPCM commands contactor relays closed. A 70% PWM (±5%) is displayed when the HPCM commands contactor relays open. A PWM signal outside of these two ranges is considered an invalid request and contactor relays will remain open. In addition to the PWM signal, the HPCM will send the BECM a corresponding serial data command to close or open the contactor relays.

12V Circuit Current
- This parameter displays the actual current flow of the low voltage (12 V) circuit as detected by the accessory DC power control module (APM). The APM internal sensor detects current in a range from 0-255 Amps.

12V Circuit Voltage
- This parameter displays the actual voltage of the low voltage (12 V) circuit as detected by the accessory DC power control module (APM). The APM internal sensor detects voltage in a range from 0-25.5 V.

APM Set Point
- This parameter displays the low voltage (12 V) conversion circuit output as a duty cycle percentage as detected by the accessory DC power control module (APM). The APM receives the Low Voltage (12 V) output request from the hybrid powertrain control module (HPCM). The HPCM receives a low voltage (12 V) 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 (12 V) circuit.

12V Enable Command
- This parameter displays the commanded state of the low voltage (12 V) 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 (12 V) conversion enable command from the HPCM. The APM converts high voltage (300 V) to low voltage (12 V) and supplies current on the low voltage (12 V) circuit in order to support the 12 V electrical system loads and also to charge the accessory battery.

300V Charge Command
- This parameter displays the commanded state of the high voltage (300 V) conversion circuit of the accessory DC power control module (APM). The APM is capable of converting high current / low voltage on the 12 V electrical system into high voltage / low current on the 300 V electrical system. This process occurs only during the Jump Assist service operation and requires the assistance of an off-vehicle 12 V battery charger. On is displayed when the APM has received the Jump Assist enable command from the hybrid powertrain control module (HPCM).

DMCM Coolant Temperature
- The drive motor generator control module (DMCM) is cooled by an independent cooling system. The DMCM is the name for the combined drive motor generator power inverter module (PIM) and accessory DC power control module (APM) assembly. The PIM/APM assembly, or DMCM, share a common cooling system. The engine control module (ECM) monitors the DMCM temperature in order to command the coolant fans to the required speed. The ECM detects temperature in a range from -40°C to +215°C (-40°F to +419°F).

Hybrid Battery SOC
- This parameter displays the state of charge of the hybrid batteries as detected by the battery energy control module (BECM). The hybrid batteries are typically maintained between 50-80 percent to extend battery life.

Hybrid Battery Current
- This parameter displays the actual current flow of the high voltage (300 V electrical system as detected by the battery energy control module (BECM). The BECM sensor detects current flow in a range from -1638.4 to +8.35 Amps.

Hybrid Batt Max. Cell Temp.
- This parameter displays the maximum hybrid battery temperature monitored during the current ignition cycle as detected by the battery energy control module (BECM). The hybrid battery contains many batteries wired in series. The BECM monitors hybrid battery temperature at several locations within the drive motor/generator battery assembly. The BECM detects temperature in a range from -40°C to +215°C (-40°F to +419°F).

Hybrid Batt Min Cell Temp.
- This parameter displays the minimum hybrid battery temperature monitored during the current ignition cycle as detected by the battery energy control module (BECM). The hybrid battery contains many batteries wired in series. The BECM monitors hybrid battery temperature at several locations within the drive motor/generator battery assembly. The BECM detects temperature in a range from -40°C to +215°C (-40°F to +419°F).

ICE Status
- This parameter displays the current status of the internal combustion engine (ICE) as determined by the ECM. The hybrid powertrain control module (HPCM) monitors the ECM for this data in order to determine ICE status. The ECM detects the engine status modes of Off, Start, Running, Stop and Failed/Stalled.

ICE Cranking Speed Commanded
- This parameter displays the requested rotations per minute (rpm) of the engine crankshaft during a cranking event. The ECM determines the internal combustion engine (ICE) cranking speed for current conditions such as engine temperature. The ECM will requests a certain cranking speed be delivered by the hybrid powertrain control module (HPCM) when the hybrid system cranks the ICE. The ECM requests ICE crank speed in a range from 0-2040 rpm.

ICE Cranking Status
- This parameter displays the status of the internal combustion engine (ICE) crank request of the ECM. The hybrid powertrain control module (HPCM) monitors the ECM for this data in order to determine whether to enable or disable ICE cranking. Crank Aborted will be displayed when the ECM has detected conditions such as theft deterrent that disable the ICE crank event.

APP Angle
- This parameter displays the position of the accelerator pedal as detected by the ECM. The hybrid powertrain control module (HPCM) monitors the ECM for this data in order to determine the operators request for vehicle acceleration and deceleration. The HPCM detects pedal position in a range from 0-99.6 percent. 99.6 percent is displayed when the pedal is fully depressed.

Motor 1 Temperature
- This parameter displays the temperature of the Motor 1 temperature sensor as detected by the motor control module (MCM). The MCM detects motor temperature is a range from -40°C to +215°C (-40°F to +419°F).

Motor 2 Temperature
- This parameter displays the temperature of the Motor 2 temperature sensor as detected by the motor control module (MCM). The MCM detects motor temperature is a range from -40°C to +215°C (-40°F to +419°F).

Motor 1 Torque Commanded
- This parameter displays the commanded torque of Motor 1 as determined by the motor control module (MCM). The MCM detects torque in a range from -512 to +508 N.m.

Motor 2 Torque Commanded
- This parameter displays the commanded torque of Motor 2 as determined by the motor control module (MCM). The MCM detects torque in a range from -512 to +508 N.m.

Motor 1 Torque Actual
- This parameter displays the actual torque of Motor 1 as determined by the motor control module (MCM). The MCM detects torque in a range from -512 to +508 N.m.

Motor 2 Torque Actual
- This parameter displays the actual torque of Motor 2 as determined by the motor control module (MCM). The MCM detects torque in a range from -512 to +508 N.m.

IMS Range
- This parameter displays the vehicle direction selected as detected by the transmission internal mode switch (IMS). The IMS contains two discrete shift lever-actuated switch patterns. The IMS range switch pattern is monitored by the transmission control module (TCM) and is utilized to determine gear range as selected by the shift lever. The IMS direction switch pattern is monitored by the hybrid powertrain control module (HPCM) and is utilized to determine vehicle direction and the Park/Neutral start safety condition as selected by the shift lever. The PRNDL Direction Range parameter decodes the IMS direction switch inputs and displays PARK, REVERSE, NEUTRAL, DRIVE, TRANSITION and INVALID.

IMS Status D1
- This parameter displays the decoded status of the transmission direction internal mode switch (IMS) individual circuit D1. The IMS contains two discrete shift lever-actuated switch patterns. The IMS range switch pattern is monitored by the transmission control module (TCM) and is utilized to determine gear range as selected by the shift lever. The IMS direction switch pattern is monitored by the hybrid powertrain control module (HPCM) and is utilized to determine vehicle direction and the Park/Neutral start safety condition as selected by the shift lever. High is displayed when the module monitors a high voltage potential on the IMS circuit. Low is displayed when the module monitors a zero voltage potential on the IMS circuit. The HPCM compares the individual IMS circuit high and low states to expected patterns in order to determine shift lever position. Illegal is displayed when the individual circuit high and low states do not indicate an expected pattern.

IMS Status D2
- This parameter displays the decoded status of the transmission direction internal mode switch (IMS) individual circuit D2. The IMS contains two discrete shift lever-actuated switch patterns. The IMS range switch pattern is monitored by the transmission control module (TCM) and is utilized to determine gear range as selected by the shift lever. The IMS direction switch pattern is monitored by the hybrid powertrain control module (HPCM) and is utilized to determine vehicle direction and the Park/Neutral start safety condition as selected by the shift lever. High is displayed when the module monitors a high voltage potential on the IMS circuit. Low is displayed when the module monitors a zero voltage potential on the IMS circuit. The HPCM compares the individual IMS circuit high and low states to expected patterns in order to determine shift lever position. Illegal is displayed when the individual circuit high and low states do not indicate an expected pattern.

IMS Status R1
- This parameter displays the decoded status of the transmission direction internal mode switch (IMS) individual circuit R1. The IMS contains two discrete shift lever-actuated switch patterns. The IMS range switch pattern is monitored by the transmission control module (TCM) and is utilized to determine gear range as selected by the shift lever. The IMS direction switch pattern is monitored by the hybrid powertrain control module (HPCM) and is utilized to determine vehicle direction and the Park/Neutral start safety condition as selected by the shift lever. High is displayed when the module monitors a high voltage potential on the IMS circuit. Low is displayed when the module monitors a zero voltage potential on the IMS circuit. The HPCM compares the individual IMS circuit high and low states to expected patterns in order to determine shift lever position. Illegal is displayed when the individual circuit high and low states do not indicate an expected pattern.

IMS Status R2
- This parameter displays the decoded status of the transmission direction internal mode switch (IMS) individual circuit R2. The IMS contains two discrete shift lever-actuated switch patterns. The IMS range switch pattern is monitored by the transmission control module (TCM) and is utilized to determine gear range as selected by the shift lever. The IMS direction switch pattern is monitored by the hybrid powertrain control module (HPCM) and is utilized to determine vehicle direction and the Park/Neutral start safety condition as selected by the shift lever. High is displayed when the module monitors a high voltage potential on the IMS circuit. Low is displayed when the module monitors a zero voltage potential on the IMS circuit. The HPCM compares the individual IMS circuit high and low states to expected patterns in order to determine shift lever position. Illegal is displayed when the individual circuit high and low states do not indicate an expected pattern.

IMS Status S
- This parameter displays the decoded status of the transmission direction internal mode switch (IMS) individual circuit S. The IMS contains two discrete shift lever-actuated switch patterns. The IMS range switch pattern is monitored by the transmission control module (TCM) and is utilized to determine gear range as selected by the shift lever. The IMS direction switch pattern is monitored by the hybrid powertrain control module (HPCM) and is utilized to determine vehicle direction and the Park/Neutral start safety condition as selected by the shift lever. High is displayed when the module monitors a high voltage potential on the IMS circuit. Low is displayed when the module monitors a zero voltage potential on the IMS circuit. The HPCM compares the individual IMS circuit high and low states to expected patterns in order to determine shift lever position. Illegal is displayed when the individual circuit high and low states do not indicate an expected pattern.

Hybrid Trans. Mode Commanded
- This parameter displays the commanded hybrid mode as determined by the hybrid powertrain control module (HPCM). The HPCM commands the following modes: Park/Neutral, EV1, EV2 and Gear 1/2/3/4.

Hybrid Trans. Mode Actual
- This parameter displays the actual hybrid mode as detected by the hybrid powertrain control module (HPCM). The HPCM detects the following modes: Park/Neutral, EV1, EV2, Gear 1/2/3/4 and Invalid.

Motor 1 Speed Actual
- This parameter displays the actual rotations per minute (rpm) of Motor 1 as detected by the motor control module (MCM). The MCM detects speed in a range from -32768 to +32767 rpm. A positive number indicates the motor is rotating in a clockwise manner.

Motor 2 Speed Actual
- This parameter displays the actual rotations per minute (rpm) of Motor 2 as detected by the motor control module (MCM). The MCM detects speed in a range from -32768 to +32767 rpm. A positive number indicates the motor is rotating in a clockwise manner.

Aux. Trans. Fluid Pump Commanded
- This parameter displays the commanded rotations per minute (rpm) of the auxiliary transmission fluid pump (ATFP) as determined by the hybrid powertrain control module (HPCM). The HPCM will command the ATFP control module to operate the auxiliary pump at a specified rpm. 100 percent is displayed when the HPCM has requested the ATFP control module to operate the pump at maximum speed.

Aux. Trans. Fluid Pump Actual
- This parameter displays the actual rotations per minute (rpm) of the auxiliary transmission fluid pump (ATFP) as determined by the hybrid powertrain control module (HPCM). The HPCM will command the ATFP control module to operate the auxiliary pump at a specified rpm. 100 percent is displayed when the ATFP control module determines the pump is operating at maximum speed.

Aux. Trans. Fluid Pump Fault Status 1
- This parameter displays the fault status of the auxiliary transmission fluid pump (ATFP) control module for the current ignition cycle as detected by the hybrid powertrain control module (HPCM). The HPCM will command the ATFP control module to operate the auxiliary pump at a specified rpm. The ATFP control module communicates ATFP status to the HPCM. The ATFP control module detects the following conditions: PWM Input Signal Fault, Motor Phase Harness Open/Short, Motor Power Drive Circuit Fault, Temperature Sensor Open/Short, Motor Supply Voltage Low, Controller MOSFET Overtemperature, Controller MOSFET Hot, Motor Current Out of Range, Processing or Motor Current Fault, Unable to Start and No PWM Response.

Aux. Trans. Fluid Pump Fault Status 2
- This parameter displays the fault status of the auxiliary transmission fluid pump (ATFP) control module for the current ignition cycle as detected by the hybrid powertrain control module (HPCM). The HPCM will command the ATFP control module to operate the auxiliary pump at a specified rpm. The ATFP control module communicates ATFP status to the HPCM. The ATFP control module detects the following conditions: PWM Input Signal Fault, Motor Phase Harness Open/Short, Motor Power Drive Circuit Fault, Temperature Sensor Open/Short, Motor Supply Voltage Low, Controller MOSFET Overtemperature, Controller MOSFET Hot, Motor Current Out of Range, Processing or Motor Current Fault, Unable to Start and No PWM Response.

Autostart Entry Reasons

Hood Open
- This parameter displays the status of the hood latch switch as determined by the engine control module (ECM). The hybrid powertrain control module (HPCM) displays hood open status as Yes or No.

ECM Request
- This parameter displays the status of an Autostart request by the engine control module (ECM). The hybrid powertrain control module (HPCM) displays ECM Request as Yes or No.

IMS Range
- This parameter displays the status of an Autostart request due to IMS Range selection. Autostart is requested when Manual is selected. The hybrid powertrain control module (HPCM) displays IMS Range as Yes or No.

Hybrid Battery SOC
- This parameter displays the status of an Autostart request due to hybrid battery state of charge. Autostart is requested when hybrid battery SOC is less than a calibrated value. The hybrid powertrain control module (HPCM) displays Hybrid Battery SOC as Yes or No.