For 1990-2009 cars only
ABS System Disable: This parameter displays Yes if the Powertrain
Control Module (PCM) or the Transmission Control Module (TCM) is not receiving input
from the Antilock Brake System (ABS), and the All-Wheel Drive (AWD) system is disabled.
AWD Circuit Status: This parameter displays the status of the axle actuator control circuit to the AWD solenoid and displays OK, Short, or Open. The AWD Disable lamp will be illuminated for short and open conditions.
AWD Clutch Temp. Disable: This parameter displays the status of powertrain software that has the ability to disable AWD based on a rear drive module clutch slip/time calculation and displays Yes or No. If the software determines that a clutch overtemperature condition exists, the AWD system will be deactivated by disabling the PWM signal line to the AWD solenoid. The AWD system will be enabled again when the software calculates that the clutch temperatures have dropped sufficiently. The AWD Disable lamp will be illuminated for a Yes condition.
AWD Disabled: This parameter displays if the AWD system has been disabled and displays Yes or No. The AWD Disabled lamp will be illuminated for a Yes condition.
AWD Duty Cycle: This parameter displays the commanded state of the AWD solenoid, expressed as a percent of ON time. At vehicle start-up, duty cycle will be at 75-90 percent for 3 seconds. This is referred to as the pull-in duty cycle. After 3 seconds, the duty cycle will drop to 20-30 percent for 30 seconds. This is referred to as the hold-in duty cycle. After each 30 second hold-in period, the duty cycle will be increased to 75-90 percent for 0.5 second, before returning to the hold-in duty cycle. This is to assure solenoid pull-in.
AWD Fluid Temp. Disable: This parameter displays a fluid overtemperature condition in the rear drive module and displays Yes or No. When the sump temperature exceeds approximately 110°C (230°F), a pull-up resistor grounds the PWM signal line at the AWD solenoid. The pull-up resistor is an integral part of the AWD solenoid. The AWD Disable lamp will be illuminated for a Yes condition.
AWD Minispare Disable: This parameter displays whether the ABS module detects a minispare on the vehicle and displays Yes or No. The wheel rotational speed difference is detected by the wheel speed sensors of the ABS system. If the ABS module detects a minispare on the vehicle, the AWD system will be deactivated by disabling the PWM signal line to the AWD solenoid. The AWD Disable lamp will be illuminated for a Yes condition.
AWD Overtemp. Delay: This parameter displays whether the AWD system is in a reset mode following an AWD fluid temperature disable. The rear drive module (RDM) resistor is an integral part of the AWD solenoid. The RDM resistor senses for an overtemperature condition of 110°C (230°F) or greater. If this condition is met, the scan tool will display Yes, the RDM resistor will ground the AWD solenoid PWM signal, and the AWD Disable lamp will be illuminated. Following an overtemperature condition, if the RDM resistor senses 95°C (203°F) or less, the RDM resistor removes the ground path from the AWD solenoid PWM signal and the AWD system begins a 10 minute delay period. After the 10 minute delay period, and once vehicle speed is 0 km/h (0 mph), the AWD Disable lamp will no longer be illuminated.
AWD Torque Management: This parameter displays when some form of torque management is being performed to protect the AWD system, and displays Active. When there is no form of torque management being performed, the display reads Inactive.
AWD Voltage Disable: This parameter displays whether the ignition voltage to the AWD solenoid is in the proper range, and displays Yes or No. The ignition voltage range to the AWD solenoid is 9-16 volts. The AWD system will be deactivated by disabling the PWM signal line to the AWD solenoid if the ignition voltage is out of range. The AWD Disable lamp will be illuminated for a Yes condition.
AWD Wheel Speed Disable: This parameter displays whether the wheel speed data received from the ABS controller is valid, and displays Yes or No. If the ABS module transmits is not satisfactory for the AWD system to be active, the AWD system will be deactivated, by disabling the PWM signal line to the AWD solenoid. The AWD Disable lamp will be illuminated for a Yes condition.
Calc. Throttle Position: This parameter displays a calculated value, which is determined by the accelerator pedal position and the actual throttle position, used to optimize transmission controls. The parameter represents the driver's intended request for torque or acceleration. The range is 0-100%, where 0% represents an idle or coast request and 100% represents a request for wide open throttle (WOT).
Commanded Gear: This parameter displays the current commanded state of the shift solenoid valves. The scan tool displays 1, 2, 3, 4 or 5.
ECT: This parameter displays the input signal from the engine coolant temperature (ECT) sensor. ECT is high at 151°C (304°F) when the signal voltage is low, 0 volt. ECT is low at -40°C (-40°F) when the signal voltage is high, 5 volt.
Engine Speed: This parameter displays the rotational speed of the engine expressed as revolutions per minute.
Engine Torque: This parameter displays a calculated value based on engine load, throttle position, mass air flow, and other engine inputs. This parameter is accurate to within 20 N·m (15 ft lb) of actual measured engine torque.
Gear Ratio: This parameter displays the actual transmission gear ratio. The scan tool displays the gear ratio calculated from the automatic transmission input shaft speed sensor (AT ISS) and the automatic transmission output shaft speed sensor (AT OSS) inputs.
Ignition Voltage: This parameter displays the system voltage measured at the ignition feed.
IMS: This parameter displays PARK, PARK/REVERSE, REVERSE, REVERSE/NEUTRAL, NEUTRAL, NEUTRAL/DRIVE 4, DRIVE 4, DRIVE 4/DRIVE 3, DRIVE 3, DRIVE 3/DRIVE 2, DRIVE 2, DRIVE 2/DRIVE 1, DRIVE 1 or INVALID. The IMS Range display represents a decoded status of the four inputs from the IMS. The combination of IMS inputs are used to determine which position the manual valve is in at any time.
IMS A/B/C/P: This parameter displays the status of the four A/B/C/P inputs from the automatic transmission internal mode switch. I indicates an ignition voltage signal. LOW indicates a 0 voltage signal. The scan tool will display HI/LOW, HI/LOW, HI/LOW, HI/LOW.
Last Disable Odometer: This parameter displays the vehicle mileage at which the AWD Last Disable condition occurred.
Last Disable Reason: This parameter displays the last AWD disable reason. The possible reasons are Output Controls, Fluid Temp, Clutch Temp, Wheel Speed, Voltage, Mini Spare, ABS System. The Output Controls reason indicates that AWD was last disabled with a service scan tool. Fluid Temp, Clutch Temp, Wheel Speed, Voltage, Mini Spare and ABS System each have a unique parameter that is described elsewhere in this table.
TP Angle: This parameter displays a percentage that is calculated based on TP sensor voltage. The TP angle should display 0 percent at idle and 100 percent at wide open throttle (WOT).
Trans. Fluid Temp.: This parameter displays the input signal of the transmission fluid temperature sensor. Transmission fluid temperature is high, 151°C (304°F), when signal voltage is low, 0 volt. Transmission fluid temperature is low, -40°C (-40°F), when signal voltage is high, 5 volt.
Transmission ISS: This parameter displays the rotational speed of the transmission input shaft. The scan tool displays input shaft speed as revolutions per minute (RPM).
Transmission OSS: This parameter displays the rotational speed of the transmission output shaft. The scan tool displays output shaft speed as revolutions per minute (RPM).
Vehicle Speed: This parameter displays the speed at which the vehicle is traveling. The scan tool displays vehicle speed as kilometers per hour (km/h), miles per hour (MPH). The vehicle speed is calculated based on the input signal from the vehicle speed sensor.
AWD Circuit Status: This parameter displays the status of the axle actuator control circuit to the AWD solenoid and displays OK, Short, or Open. The AWD Disable lamp will be illuminated for short and open conditions.
AWD Clutch Temp. Disable: This parameter displays the status of powertrain software that has the ability to disable AWD based on a rear drive module clutch slip/time calculation and displays Yes or No. If the software determines that a clutch overtemperature condition exists, the AWD system will be deactivated by disabling the PWM signal line to the AWD solenoid. The AWD system will be enabled again when the software calculates that the clutch temperatures have dropped sufficiently. The AWD Disable lamp will be illuminated for a Yes condition.
AWD Disabled: This parameter displays if the AWD system has been disabled and displays Yes or No. The AWD Disabled lamp will be illuminated for a Yes condition.
AWD Duty Cycle: This parameter displays the commanded state of the AWD solenoid, expressed as a percent of ON time. At vehicle start-up, duty cycle will be at 75-90 percent for 3 seconds. This is referred to as the pull-in duty cycle. After 3 seconds, the duty cycle will drop to 20-30 percent for 30 seconds. This is referred to as the hold-in duty cycle. After each 30 second hold-in period, the duty cycle will be increased to 75-90 percent for 0.5 second, before returning to the hold-in duty cycle. This is to assure solenoid pull-in.
AWD Fluid Temp. Disable: This parameter displays a fluid overtemperature condition in the rear drive module and displays Yes or No. When the sump temperature exceeds approximately 110°C (230°F), a pull-up resistor grounds the PWM signal line at the AWD solenoid. The pull-up resistor is an integral part of the AWD solenoid. The AWD Disable lamp will be illuminated for a Yes condition.
AWD Minispare Disable: This parameter displays whether the ABS module detects a minispare on the vehicle and displays Yes or No. The wheel rotational speed difference is detected by the wheel speed sensors of the ABS system. If the ABS module detects a minispare on the vehicle, the AWD system will be deactivated by disabling the PWM signal line to the AWD solenoid. The AWD Disable lamp will be illuminated for a Yes condition.
AWD Overtemp. Delay: This parameter displays whether the AWD system is in a reset mode following an AWD fluid temperature disable. The rear drive module (RDM) resistor is an integral part of the AWD solenoid. The RDM resistor senses for an overtemperature condition of 110°C (230°F) or greater. If this condition is met, the scan tool will display Yes, the RDM resistor will ground the AWD solenoid PWM signal, and the AWD Disable lamp will be illuminated. Following an overtemperature condition, if the RDM resistor senses 95°C (203°F) or less, the RDM resistor removes the ground path from the AWD solenoid PWM signal and the AWD system begins a 10 minute delay period. After the 10 minute delay period, and once vehicle speed is 0 km/h (0 mph), the AWD Disable lamp will no longer be illuminated.
AWD Torque Management: This parameter displays when some form of torque management is being performed to protect the AWD system, and displays Active. When there is no form of torque management being performed, the display reads Inactive.
AWD Voltage Disable: This parameter displays whether the ignition voltage to the AWD solenoid is in the proper range, and displays Yes or No. The ignition voltage range to the AWD solenoid is 9-16 volts. The AWD system will be deactivated by disabling the PWM signal line to the AWD solenoid if the ignition voltage is out of range. The AWD Disable lamp will be illuminated for a Yes condition.
AWD Wheel Speed Disable: This parameter displays whether the wheel speed data received from the ABS controller is valid, and displays Yes or No. If the ABS module transmits is not satisfactory for the AWD system to be active, the AWD system will be deactivated, by disabling the PWM signal line to the AWD solenoid. The AWD Disable lamp will be illuminated for a Yes condition.
Calc. Throttle Position: This parameter displays a calculated value, which is determined by the accelerator pedal position and the actual throttle position, used to optimize transmission controls. The parameter represents the driver's intended request for torque or acceleration. The range is 0-100%, where 0% represents an idle or coast request and 100% represents a request for wide open throttle (WOT).
Commanded Gear: This parameter displays the current commanded state of the shift solenoid valves. The scan tool displays 1, 2, 3, 4 or 5.
ECT: This parameter displays the input signal from the engine coolant temperature (ECT) sensor. ECT is high at 151°C (304°F) when the signal voltage is low, 0 volt. ECT is low at -40°C (-40°F) when the signal voltage is high, 5 volt.
Engine Speed: This parameter displays the rotational speed of the engine expressed as revolutions per minute.
Engine Torque: This parameter displays a calculated value based on engine load, throttle position, mass air flow, and other engine inputs. This parameter is accurate to within 20 N·m (15 ft lb) of actual measured engine torque.
Gear Ratio: This parameter displays the actual transmission gear ratio. The scan tool displays the gear ratio calculated from the automatic transmission input shaft speed sensor (AT ISS) and the automatic transmission output shaft speed sensor (AT OSS) inputs.
Ignition Voltage: This parameter displays the system voltage measured at the ignition feed.
IMS: This parameter displays PARK, PARK/REVERSE, REVERSE, REVERSE/NEUTRAL, NEUTRAL, NEUTRAL/DRIVE 4, DRIVE 4, DRIVE 4/DRIVE 3, DRIVE 3, DRIVE 3/DRIVE 2, DRIVE 2, DRIVE 2/DRIVE 1, DRIVE 1 or INVALID. The IMS Range display represents a decoded status of the four inputs from the IMS. The combination of IMS inputs are used to determine which position the manual valve is in at any time.
IMS A/B/C/P: This parameter displays the status of the four A/B/C/P inputs from the automatic transmission internal mode switch. I indicates an ignition voltage signal. LOW indicates a 0 voltage signal. The scan tool will display HI/LOW, HI/LOW, HI/LOW, HI/LOW.
Last Disable Odometer: This parameter displays the vehicle mileage at which the AWD Last Disable condition occurred.
Last Disable Reason: This parameter displays the last AWD disable reason. The possible reasons are Output Controls, Fluid Temp, Clutch Temp, Wheel Speed, Voltage, Mini Spare, ABS System. The Output Controls reason indicates that AWD was last disabled with a service scan tool. Fluid Temp, Clutch Temp, Wheel Speed, Voltage, Mini Spare and ABS System each have a unique parameter that is described elsewhere in this table.
TP Angle: This parameter displays a percentage that is calculated based on TP sensor voltage. The TP angle should display 0 percent at idle and 100 percent at wide open throttle (WOT).
Trans. Fluid Temp.: This parameter displays the input signal of the transmission fluid temperature sensor. Transmission fluid temperature is high, 151°C (304°F), when signal voltage is low, 0 volt. Transmission fluid temperature is low, -40°C (-40°F), when signal voltage is high, 5 volt.
Transmission ISS: This parameter displays the rotational speed of the transmission input shaft. The scan tool displays input shaft speed as revolutions per minute (RPM).
Transmission OSS: This parameter displays the rotational speed of the transmission output shaft. The scan tool displays output shaft speed as revolutions per minute (RPM).
Vehicle Speed: This parameter displays the speed at which the vehicle is traveling. The scan tool displays vehicle speed as kilometers per hour (km/h), miles per hour (MPH). The vehicle speed is calculated based on the input signal from the vehicle speed sensor.
