| Table 1: | Scan Tool Data Parameters |
| Table 2: | Scan Tool Output Controls |
Parameter | Expected Value | Description |
|---|---|---|
Operating Conditions: Engine Idling/Radiator Hose Hot/Closed Throttle/Park or Neutral/Closed Loop/Accessories OFF, unless otherwise noted. | ||
2WD High Indicator Light | On | This parameter displays On when the transfer case shift control module commands the 2WD high indicator light On. The scan tool displays On or Off. |
4WD High Indicator Light | Off | This parameter displays On when the transfer case shift control module commands the 4WD high indicator light On. The scan tool displays On or Off. |
4WD Low Active | No | This parameter displays Yes when the transfer case is currently in the 4WD low lock mode. The scan tool displays Yes or No. |
4WD Low Indicator Light | Off | This parameter displays On when the transfer case shift control module commands the 4WD low indicator light On. The scan tool displays On or Off. |
Battery Voltage | Battery Voltage | This parameter displays the voltage measured by the transfer case shift control module at the transfer case shift control module battery feed. The scan tool displays a range of 0-25.5 volts. |
Encoder Gear Position | 2WD | This parameter displays the mode the transfer case is currently in. |
Encoder Return Voltage | 0-7.5 V | This parameter displays the voltage measured by the transfer case shift control module at the encoder signal return. The scan tool displays a range of 0-7.5 volts. |
Encoder Supply Voltage | 0-7.5 V | This parameter displays the voltage measured by the transfer case shift control module at the 5 volt reference circuit. The scan tool displays a range of 0-7.5 volts. |
Ign. Cycles Since Last Current DTC | Varies | This parameter displays how many ignition cycles have occurred since last current DTC was set. The scan tool displays a numeric value. |
Mode Switch Return Voltage | 0-5 V | This parameter displays the return voltage from the transfer case shift control switch. The scan tool displays a range of 0-5 volts. |
Mode Switch Selected | Off | This parameter displays the transfer case shift control switch button currently depressed by the driver. |
Motor A Current | Varies | The parameter displays the actual current flowing through the circuit. |
Motor B Current | Varies | |
Neutral Indicator Light | Off | This parameter displays On when the transfer case shift control module commands the neutral indicator light On. The scan tool displays On or Off. |
Service 4WD Lamp | Off | This parameter displays On if the transfer case shift control module commands the Service 4WD lamp, or message, On. The scan tool displays On or Off. |
Output Control | Description |
|---|---|
Refer to the scan tool manual for complete scan tool operating instructions. | |
2WD High Indicator Light | This function allows the technician to command the 2WD high indicator light, within the transfer case shift control switch, on or off. |
4WD High Indicator Light | This function allows the technician to command the 4WD high indicator light, within the transfer case shift control switch, on or off. |
4WD Low Indicator Light | This function allows the technician to command the 4WD low indicator light, within the transfer case shift control switch, on or off. |
ATC Motor A Control | This function allows the technician to energize the motor, causing it to shift the transfer case through all five modes. Motor control A moves in the opposite direction as motor control B. |
ATC Motor B Control | This function allows the technician to energize the motor, causing it to shift the transfer case through all five modes. Motor control B moves in the opposite direction as motor control A. |
Neutral Indicator Light | This function allows the technician to command the neutral indicator light, within the transfer case shift control switch, on or off. |
