For a complete wiring diagram Refer to Section 8W.When Monitored:While the CAN bus ignition status is in IGN_RUN, the module checks the sensor input ranges.Set Condition:If the module detects that the sensor input is greater than 96 ± 0.6% of the (R701) Seat Weight Sensor 5 Volt circuit voltage. Note that this DTC will remain active after the condition that set this fault is no longer present. Performing the Occupant Classification Module System Verification Test will change the status from active to stored if the condition that set the fault is no longer present.Possible CausesPASSENGER SEAT HARNESS IMPROPERLY ROUTEDPASSENGER SEAT HARNESS WIRES CHAFED, PIERCED, PINCHED, PARTIALLY BROKENPASSENGER SEAT HARNESS CONNECTOR TERMINALS BROKEN, BENT PUSHED OUT, SPREAD, CORRODED, CONTAMINATED(R717) LT-FT SEAT WEIGHT SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE(R717) LT-FT SEAT WEIGHT SENSOR SIGNAL CIRCUIT SHORTED TO (R701) SEAT WEIGHT SENSOR 5 VOLT CIRCUIT(R728) SEAT WEIGHT SENSOR GROUND CIRCUIT OPENLEFT-FRONT SEAT WEIGHT SENSOROCCUPANT CLASSIFICATION MODULE (OCM)1. CHECK FOR ACTIVE INTERNAL FAULTS, IGNITION FAULTS, & BATTERY FAULTS IN THE OCCUPANT CLASSIFICATION MODULE (OCM)Ensure that the battery is fully charged.Turn the ignition on, then off, and then on again.With the scan tool, read Occupant Classification Module (OCM) DTCs.Does the scan tool display any active DTCs relating to internal faults, ignition faults, or battery faults?YesDiagnose and repair the DTCs. Refer to the Table of Contents in this Section for a complete list of symptoms.NoGo To 22. PREFORM OCM VERIFICATIONFailure to follow the test instructions or aborting the test will cause faults to set when performing the Occupant Classification Module System Verification Test. To prevent faults due to process errors: verify that all tests steps that led you here were performed as directed; verify that the ignition is in run; Wait 30 seconds after changing the seat weight before proceeding to allow the system to stabilize; only press scan tool buttons when directed to do so; and perform the Occupant Classification Module System Verification Test to completion.With the scan tool in OCM, select More Options, select System Tests, and select Occupant Classification Module System Verification Test. Run the test by following the instructions displayed on the scan tool. When the test is complete, wait two minutes, and then proceed as follows.With the scan tool, read OCM DTCs.Does the scan tool display active: B1B7A-PASSENGER SEAT WEIGHT SENSOR 3 - LEFT FRONT INPUT CIRCUIT HIGH?YesGo To 3NoGo To 93. VERIFY SENSOR TORQUEVerify that all of the Seat Weight Sensor mounting screws are tightened to torque specification. Refer to GROUP 23 for specification.Failure to follow the test instructions or aborting the test will cause faults to set when performing the Occupant Classification Module System Verification Test. To prevent faults due to process errors: verify that all tests steps that led you here were performed as directed; verify that the ignition is in run; Wait 30 seconds after changing the seat weight before proceeding to allow the system to stabilize; only press scan tool buttons when directed to do so; and perform the Occupant Classification Module System Verification Test to completion.With the scan tool in OCM, select More Options, select System Tests, and select Occupant Classification Module System Verification Test. Run the test by following the instructions displayed on the scan tool. When the test is complete, wait two minutes, and then proceed as follows.With the scan tool, read OCM DTCs.Does the scan tool display active: B1B7A-PASSENGER SEAT WEIGHT SENSOR 3 - LEFT FRONT INPUT CIRCUIT HIGH?YesGo To 4NoGo To 94. INSPECT PASSENGER SEAT HARNESS WIRES AND CONNECTORSTo avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.Using the wiring diagram / schematic as a guide, inspect the Passenger Seat Harness wiring and connectors. Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.Are any of these conditions present?YesDo not attempt to repair the Seat Harness. Replace the Seat Harness if the condition inspecting or testing for is present in the Seat Harness.Replace the Passenger Seat Harness in accordance with the Service Information.Perform *OCM SYSTEM VERIFICATION TEST.NoGo To 55. VERIFY THAT PASSENGER SEAT HARNESS IS ROUTED CORRECTLYVerify that the Passenger Seat Harness is routed correctly.Is the Passenger Seat Harness routed correctly?YesGo To 6NoReroute the Passenger Seat Harness as necessary.Perform *OCM SYSTEM VERIFICATION TEST.6. CHECK (R717) LT-FT SEAT WEIGHT SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE

Disconnect the OCM C2 connector.Measure the voltage of the (R717) LT-FT Seat Weight Sensor Signal circuit.Do not attempt to repair the Seat Harness. Replace the Seat Harness if the condition inspecting or testing for is present in the Seat Harness.Is the voltage above 0.2 volt?YesReplace the Passenger Seat Harness in accordance with the Service Information.Perform *OCM SYSTEM VERIFICATION TEST.NoGo To 77. CHECK (R717) LT-FT SEAT WEIGHT SENSOR SIGNAL CIRCUIT FOR A SHORT TO (R701) SEAT WEIGHT SENSOR 5 VOLT CIRCUIT

Disconnect the Left-Front Seat Weight Sensor connector.Measure the resistance between the (R717) LT-FT Seat Weight Sensor Signal circuit and the (R701) Seat Weight Sensor 5 Volt circuit.Do not attempt to repair the Seat Harness. Replace the Seat Harness if the condition inspecting or testing for is present in the Seat Harness.Is the resistance below 5.0 ohms?YesReplace the Passenger Seat Harness in accordance with the Service Information.Perform *OCM SYSTEM VERIFICATION TEST.NoGo To 88. CHECK (R728) SEAT WEIGHT SENSOR GROUND CIRCUIT FOR AN OPEN

Measure the resistance of the (R728) Seat Weight Sensor Ground circuit between the OCM C2 connector and the Left-Front Seat Weight Sensor connector.Do not attempt to repair the Seat Harness. Replace the Seat Harness if the condition inspecting or testing for is present in the Seat Harness.Is the resistance below 5.0 ohms?YesReplace the OCM in accordance with the Service Information.Perform *OCM SYSTEM VERIFICATION TEST.NoReplace the Passenger Seat Harness in accordance with the Service Information.Perform *OCM SYSTEM VERIFICATION TEST.9. CHECKING STORED OR INTERMITTENT CODESDiagnose and repair all active codes before diagnosing stored codes. Refer to the Table of Contents in this Section for a complete list of airbag system diagnostic procedures.With the scan tool, record and erase all Airbag System Module DTCs.To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.Using the wiring diagram/schematic as a guide, inspect the related wiring and connectors for chafed, pierced, pinched, and partially broken wires, and for broken, bent, pushed out, corroded, and contaminated terminals. Repair as necessary.Reconnect all disconnected components and harness connectors.To avoid serious or fatal injury, turn the ignition on, then reconnect the battery.With the scan tool, monitor for active codes while performing the following:Wiggle the wiring harness and connectors of the related airbag circuit.Continue the test until either a code becomes active or the problem area is isolated.In the previous steps you have attempted to recreate the conditions responsible for setting the DTC in question / causing the intermittent condition.Are any ACTIVE DTCs present?YesSelect the appropriate diagnostic procedure from the Table of Contents in this section.NoNo problem found at this time. Perform the Occupant Classification Module System Verification Test in this Section. Erase all codes before returning vehicle to customer.