Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSISUZU2006ASCENDER S, 5.3 M, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 555 (VEHICLE DIAGNOSTIC INFORMATION)SPECIFICATIONSTRANSFER CASE SHIFT CONTROL MODULE SCAN TOOL INFORMATION
2006 Isuzu Ascender S, 5.3 M, 4WD
Transfer Case Shift Control Module Scan Tool Information
2006 Isuzu Ascender S, 5.3 M, 4WDSECTION Transfer Case Shift Control Module Scan Tool Information
WARNING: This page is about a different car, the 2009 GMC Envoy and 2009 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
Scan Tool Data Parameters
| Parameter | Expected Value | Description |
|---|---|---|
| Operating Conditions: Engine is at idle, upper radiator hose is hot, closed throttle, gear is in PARK or NEUTRAL and accessories are OFF. | ||
| 2WD High Indicator Light | Off | 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. |
| ATC Application | Varies | This parameter displays the model number assigned to the transfer case. The scan tool displays a numeric value. |
| ATC Slip Speed | 0 | This parameter displays the RPM difference between the front and rear propshafts. The scan tool displays a range of 0-8,192 RPM. |
| Auto 4WD Indicator Light | On | This parameter displays On when the transfer case shift control module commands the auto 4WD 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. |
| Current Slip Adapts | Varies | This parameter displays corrective adjustments made by the transfer case shift control module for wheel slip events. The scan tool displays a numeric value. |
| Encoder Gear Position | Varies | This parameter displays the mode the transfer case is currently in. |
| Encoder Return Voltage | 0-5 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 | 0-5 V | This parameter displays the voltage measured by the transfer case shift control module at the 5V reference circuit. The scan tool displays a range of 0-7.5 volts. |
| Front Axle Requested | Yes | This parameter displays Yes if the transfer case shift control module requests the front axle switch On. The scan tool displays Yes or No. |
| Front Axle Switch | Locked | This parameter displays the feedback states of the front propshaft. The scan tool displays Locked or Unlocked. |
| Front Propshaft Speed | 0 | This parameter displays the rotational speed of the front propshaft. The scan tool displays a range of 0-8,192 RPM. |
| 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 | Varies | This parameter displays the transfer case shift control switch button currently depressed by the driver. |
| 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. |
| Rear Propshaft Speed | 0 | This parameter displays the rotational speed of the rear propshaft. The scan tool displays a range of 0-8,192 RPM. |
| 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. |
| Slip Adapt PWM | 0 | This parameter displays the duty cycle applied to the transfer case encoder motor. The scan tool displays a range of 0-100 percent. |
| Total Slippage | 0 | This parameter displays the total slippage of both the front and rear propshafts. The scan tool displays a range of 0-8,192 RPM. |
| Transfer Case Lock | Disabled | This parameter displays Enabled if the transfer case shift control module commands the transfer case motor brake On. The scan tool displays Enabled or Disabled. |
Scan Tool Output Controls
| 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. |
| Auto 4WD Indicator Light | This function allows the technician to command the auto 4WD indicator light, within the transfer case shift control switch, on or off. |
| Engage Front Axle | This function allows the technician to engage and disengage the front axle actuator. When the front axle actuator is engaged, the front axle becomes a live axle, causing the front propshaft to turn. |
| Neutral Indicator Light | This function allows the technician to command the neutral indicator light, within the transfer case shift control switch, on or off. |
| Transfer Case Lock | This function allows the technician to turn the transfer case lock on and off. With the transfer case lock on, the transfer case cannot be shifted. |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.