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Pinpoint Test A: Electronic Shift Functional Test

CAUTION: The function test must be carried out on a hard surface in a vacant area without traffic.
  1. A1 CHECK INDICATOR PROVE-OUT 
    • Key in OFF position.
    • Start the vehicle while observing the 4WD indicators for prove-out.
    • Did the indicators prove out? 
    • Yes  : GO to  A3.
    • No  : GO to A2.
  2. A2 CHECK FOUR-WHEEL DRIVE (4WD) CONTROL MODULE COMMUNICATION 
    • Key in ON position.
    • Disconnect: Scan Tool. Retrieve 4WD control module self-test DTCs.
    • Did the 4WD control module respond? 
  3. A3 CHECK FOR 2WD INDICATED 
    • Start the vehicle and allow to idle.
    • Apply the brake pedal and hold.
    • Shift the transmission to NEUTRAL.
    • Turn the mode select switch (MSS) to 2WD while holding the shift conditions.
    • Observe the 4WD HIGH and 4WD LOW indicators.
    • Are both indicators off? 
    • Yes  : GO to  A5.
    • No  : GO to A4.
  4. A4 CHECK FOR THE PRESENCE OF 4WD 
    • Shift the transmission to REVERSE and back the vehicle up 3.0 meters (10 feet) to relieve driveline windup.
    • Drive the vehicle forward for 3.0 meters (10 feet) and stop.
    • Press the brake pedal and hold.
    • Shift the transmission to NEUTRAL. Hold the shift conditions for 20 seconds.
    • Execute tight turns on a hard surface.
    • Check for the presence of driveline windup and tire scuff.
    • Is driveline windup and tire scuff present? 
  5. A5 VERIFY SHIFT TO 4WD HIGH 
    • Turn the mode select switch (MSS) to 4X4 HIGH.
    • Listen for shift motor operation.
    • Wait for 20 seconds after MSS is turned to 4X4 HIGH. (The system will use up to five cycles of shift attempts trying to engage 4WD HIGH.)
    • Is the 4WD HIGH indicator ON? 
    • Yes  : GO to  A7.
    • No  : GO to A6.
  6. A6 ATTEMPT MECHANICAL ASSIST ENGAGEMENT 
    • Drive the vehicle above 8 km/h (5 mph) for at least 20 seconds.
    • Stop the vehicle.
    • Observe the 4WD HIGH indicator.
    • Is the 4WD HIGH indicator ON? 
  7. A7 CHECK FOR MECHANICAL ENGAGEMENT OF 4WD HIGH 
    • Drive the vehicle for two minutes above 16 km/h (10 mph).
    • Execute tight turns on a hard surface.
    • Check for the presence of driveline windup and tire scuff.
    • Is driveline windup and tire scuff present? 
  8. A8 CHECK FOR CORRECT INDICATOR OPERATION ON 4WD LOW ENGAGEMENT 
    • While driving the vehicle forward above 8 km/h (5 mph), turn the MSS to 4X4 LOW while observing the indicators for five seconds.
    • Turn the MSS to 4X4 HIGH.
    • Stop the vehicle and apply the parking brake.
    • Shift the transmission to PARK and release the brake pedal.
    • Did the 4WD LOW indicator stay off? 
  9. A9 CHECK THE LOW RANGE INDICATOR ON IN ERROR 
    • Turn the MSS to 4X4 LOW.
    • Apply and hold the brake pedal.
    • Is the 4WD LOW indicator OFF? 
  10. A10 CHECK THE LOW RANGE INDICATOR FOR ON IN 4X4 LOW 
    • Apply and hold the brake pedal.
    • Shift the transmission to NEUTRAL.
    • Listen for shift motor operation.
    • Hold the shift conditions for 20 seconds. (The system will use up to five cycles of shift attempts trying to engage 4X4 LOW.)
    • Is the 4WD LOW indicator ON? 
    • Yes  : GO to  A12.
    • No  : GO to A11.
  11. A11 ATTEMPT MECHANICAL ASSIST OF 4WD LOW ENGAGEMENT 
      CAUTION: Make sure there is a clear area behind the vehicle before backing up.
    • Shift the transmission to REVERSE and back the vehicle up 3.0 meters (10 feet) to relieve driveline windup and stop.
    • Drive the vehicle forward for 3.0 meters (10 feet) and stop.
    • Apply the brake pedal and hold.
    • Shift the transmission to NEUTRAL.
    • Observe the 4WD LOW indicator.
    • Is the 4WD LOW indicator ON? 
  12. A12 CHECK FOR MECHANICAL ENGAGEMENT OF 4WD LOW 
      NOTE: Driveline windup and tire scuff is present in both 4WD HIGH and 4WD LOW. However, vehicle speed is severely limited in 4WD LOW.
    • Execute tight turns on a hard surface.
    • Check for the presence of driveline windup, tire scuff and reduced vehicle speed.
    • Is driveline windup, tire scuff and reduced speed present? 
  13. A13 CHECK FOR CORRECT INDICATOR OPERATION ON 4WD LOW DISENGAGEMENT 
    • While driving the vehicle forward above 8 km/h (5 mph), turn the MSS to 4X4 HIGH while observing the indicators.
    • Turn the MSS to 4X4 LOW.
    • Stop the vehicle and apply the parking brake.
    • Shift the transmission to PARK and release the brake pedal.
    • Is the 4WD LOW indicator ON? 
  14. A14 CHECK THE 4WD LOW INDICATOR 
    • Turn the MSS to 4X4 HIGH.
    • Apply and hold the brake pedal.
    • Is the 4WD LOW indicator ON? 
  15. A15 CHECK FOR 4WD LOW INDICATOR OFF IN 4WD HIGH 
    • Press and hold the brake pedal.
    • Shift the transmission to NEUTRAL.
    • Listen for shift motor operation.
    • Hold the shift conditions for 20 seconds. (The system will use up to five cycles of shift attempts trying to engage 4WD HIGH.)
    • Is the 4WD LOW indicator OFF? 
    • Yes  : GO to  A17.
    • No  : GO to A16.
  16. A16 ATTEMPT MECHANICAL ASSIST OF 4WD LOW DISENGAGEMENT 
    • Drive the vehicle forward above 8 km/h (5 mph) for at least five seconds.
    • Stop the vehicle.
    • Apply the brake pedal and hold.
    • Shift the transmission to NEUTRAL.
    • Observe the 4WD LOW indicator.
    • Is the 4WD LOW indicator OFF? 
  17. A17 CHECK FOR MECHANICAL 4WD LOW DISENGAGEMENT AND 4WD HIGH ENGAGEMENT 
    • Apply the brake.
      • CAUTION: Make sure there is a clear area behind the vehicle before backing up.
    • Shift the transmission to REVERSE and back the vehicle up 3.0 meters (10 feet) to relieve driveline windup.
    • Stop the vehicle.
    • Drive the vehicle forward and execute tight turns on a hard surface.
      • NOTE: Driveline windup and tire scuff is present in both 4WD HIGH and 4WD LOW. However, vehicle speed is severely limited in 4WD LOW.
    • Verify the presence of driveline windup and tire scuff. Also verify the increased vehicle speed from when 4WD LOW was engaged.
    • Did 4WD HIGH engage and the vehicle speed increase? 
  18. A18 CHECK THE 4WD HIGH TO 2WD SHIFT 
    • Stop the vehicle.
    • Turn the MSS to 2WD and wait 20 seconds.
    • Listen for shift motor operation.
    • Is the 4WD HIGH indicator OFF? 
    • Yes  : GO to  A20.
    • No  : GO to A19.
  19. A19 ATTEMPT MECHANICAL ASSIST OF 4WD HIGH DISENGAGEMENT 
    • Drive the vehicle forward above 8 km/h (5 mph) for at least 20 seconds.
    • Stop the vehicle.
    • Observe the 4WD HIGH indicator.
    • Is the 4WD HIGH indicator OFF? 
  20. A20 VERIFY THE TRANSFER CASE MECHANICALLY DISENGAGED 
    • Apply the parking brake.
    • Rotate the front drive shaft.
    • Does the front drive shaft turn? 
    • Yes  : The transfer case is operating correctly. INSTRUCT the customer on correct system operation.
    • No  : The transfer case did not disengage from 4WD HIGH. REPAIR the transfer case as necessary. REFER to TRANSFER CASE - AUTOMATIC SHIFT .
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