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Diagnostic Trouble Code Tests and Associated Procedures

4X4 Control Module DTC Chart

NOTE: Before carrying out the on-demand self test, switch the mode selection switch into the suspect 4WD mode (4x4 HIGH or 4x4 LOW) to verify the customer's concern.

B1317-B1555 / C1728-C1729 / P1707-P1819:




P1849-P1891 / U0100-U2050: