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Horizontal Sensor Out Of Range Low

NOTE: After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST  under VERIFICATION TESTS.
  1. Turn ignition off. Ensure Memory Heated Seat/Mirror Module (MHSMM) is properly connected. Disconnect driver power seat horizontal motor sensor connector. Turn ignition on. Measure voltage on driver power seat horizontal motor sensor connector terminal "C", seat sensor 5-volt supply circuit (Brown/White wire). See Figure . If voltage is 4.5 volts or less, go to next step. If voltage is more than 4.5 volts, go to step  4 .
  2. Turn ignition off. Disconnect MHSMM connector C2. Measure resistance between ground and MHSMM connector C2 terminal No. 6, seat sensor 5-volt supply circuit (Brown/White wire). See Figure . If resistance is 100 ohms or more, leave MHSMM connector C2 disconnected, and go to next step. If resistance is less than 100 ohms, repair short to ground in Brown/White wire.
  3. Disconnect driver power seat horizontal motor sensor connector. Measure resistance of seat sensor 5-volt supply circuit (Brown/White wire) between MHSMM connector C2 terminal No. 6 and driver power seat horizontal motor sensor connector terminal "C". See Figure and Figure . If resistance is less than 5 ohms, replace MHSMM. If resistance is 5 ohms or more, repair open in Brown/White wire.
  4. Turn ignition off. Disconnect driver power seat horizontal motor sensor connector. Connect a fused jumper wire between driver power seat horizontal motor sensor connector terminal "B", seat horizontal position signal circuit (Violet/Red wire) and terminal "C", seat sensor 5-volt supply circuit (Brown/White wire). Connect scan tool to Data Link Connector (DLC). Using scan tool, monitor HORIZONTAL POSITION SENSOR voltage. Turn ignition on. If voltage is more than 4.5 volts, replace seat track assembly. If voltage is 4.5 volts or less, leave driver power seat horizontal motor sensor connector disconnected, and go to next step.
  5. Turn ignition off. Disconnect MHSMM connector C1. Measure resistance between ground and MHSMM connector C1 terminal No. 2, seat horizontal position signal circuit (Violet/Red wire). See Figure . If resistance is less than 100 ohms, repair short to ground in Violet/Red wire. If resistance is 100 ohms or more, leave connectors disconnected, and go to next step.
  6. Measure resistance of seat horizontal position signal circuit (Violet/Red wire) between driver power seat horizontal motor sensor connector terminal "B" and MHSMM connector C1 terminal No. 2. If resistance is less than 5 ohms, replace MHSMM. If resistance is 5 ohms or more, repair open in Violet/Red wire.
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