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Home >> Chevrolet >> 1999 >> Blazer 4D Utility, 4WD, Automatic >> Repair and Diagnosis >> Transmission >> Transfer Case >> Transfer Case - Diagnosis - New Venture 233 (SELECTABLE 4WD) >> Diagnosis & Testing >> Function Test >> Test Results

Test Results

  1. If any of the 3 shift select buttons blinked once, go to next step. If any button did not blink once, see ALL SHIFT SELECT BUTTONS DO NOT LIGHT  under SYMPTOM TESTS.
  2. If one shift select button stayed lit to indicate transfer case shift position, go to next step. If one shift select button did not stay lit to indicate position, go to step  4.
  3. Shift transfer case to 4HI, then to 2HI, then back to 4HI. If transfer case mode shifts between 4HI and 2HI, go to next step. If transfer case mode does not shift between 4HI and 2HI, go to step  5.
  4. Turn ignition on (engine off). Place transmission in neutral. Push vehicle forward about 5 feet. If transfer case mode shifts between 4HI and 2HI, perform diagnosis of transfer case mechanical components. If transfer case mode does not shift between 4HI and 2HI, see REDUCED OR NO MODE & RANGE SHIFT OPERATION  under SYMPTOM TESTS.
  5. If more than one shift select button stays lit, see MORE THAN ONE SHIFT SELECT BUTTON REMAINS LIT  under SYMPTOM TESTS. If more than one shift select button does not stay lit, see REDUCED OR NO MODE & RANGE SHIFT OPERATION  under SYMPTOM TESTS.
  6. Set parking brake. Place transmission in Park (A/T) or 1st gear (M/T). Turn ignition on (engine off). Press 4LO transfer case shift select button. If 4LO button blinks for 30 seconds, go to next step. If 4LO button does not blink for 30 seconds, go to step  8.
  7. With ignition on (engine off), press 4LO shift select button and note blinking. Place transmission in Neutral (A/T) or depress clutch pedal (M/T). If 4LO shift select button stops blinking and stays lit when transmission is shifted as above, see RETRIEVING CODES  under DIAGNOSIS & TESTING. If 4LO shift select button does not react as indicated, see REDUCED OR NO MODE & RANGE SHIFT OPERATION  under SYMPTOM TESTS.
  8. If transfer case range shifts to 4LO, see ALL SHIFT SELECT BUTTONS REMAIN LIT  under SYMPTOM TESTS. If transfer case range does not shift to 4LO, see REDUCED OR NO MODE & RANGE SHIFT OPERATION  under SYMPTOM TESTS.
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