Download X1 CHECK THE IGNITION STATES Diagnostic Tool X2 RETRIEVE THE DIAGNOSTIC TROUBLE CODES X3 VERIFY THE INOPERATIVE INDICATOR LAMP Monitor the PID IGN_GEM while turning the ignition switch through the START, RUN, OFF, and ACC positions. Do the PID values agree with the ignition switch positions? Yes GO to X2. No REFER to Section 417-02. Use the recorded results from the continuous and on-demand self-tests. Are any DTCs recorded? Yes If DTC B1342, GO to X17 . No GO to X3. If DTC P1804, GO to X3 . If DTC P1806, GO to X3 . If DTC P1808, GO to X3 . If DTC P1810, GO to X3 . Verify the inoperative indicator. Are the 4×4 HIGH or 4×4 LOW indicators inoperative? Yes GO to X6. No If the 4×4 LOW indicator is inoperative, GO to X12 . If the 4×4 HIGH indicator is inoperative, GO to X7 . If both the 4×4 HIGH and 4×4 LOW indicators are inoperative, GO to X4 . X4 CHECK THE O/D OFF INDICATOR Verify the O/D OFF indicator works. Does the O/D OFF indicator function correctly? Yes GO to X7.