B1B93
B1B93-PASSENGER SEAT TRACK POSITION SENSOR CIRCUIT LOWB1B93 - Passenger Seat Track Position Sensor Circuit Low:
WHEN MONITORED
While the CAN bus ignition status is in IGN_RUN and the module is configured for a Seat Track Position Sensor, the module checks the sensor input current ranges.
SET CONDITION
If the module detects that the sensor input is less than or equal to 0.3 ma. This DTC may set when the current is between 0.3 mA and 2.0 mA.
POSSIBLE CAUSES
- Passenger seat harness improperly routed
- Passenger seat harness wires chaffed, pierced, pinched, partially broken
- Passenger seat harness connector terminals broken, bent, pushed out, spread, corroded, contaminated
- (R262) seat position sensor data-passenger circuit shorted to ground
- (R264) seat position sensor voltage-passenger circuit shorted to ground
- (R262) seat position sensor data-passenger circuit open
- (R264) seat position sensor voltage-passenger circuit open
- Passenger seat track position sensor
- Occupant classification module (OCM)
Diagnostic Test
1. CHECK FOR ACTIVE INTERNAL FAULTS, IGNITION FAULTS, & BATTERY FAULTS IN THE OCCUPANT CLASSIFICATION MODULE (OCM)
NOTE:
- Ensure the battery is fully charged.
- When reconnecting Airbag system components, the ignition must be turned off and the battery must be disconnected.
Turn the ignition on, then off, and then on again.
With the scan tool, read Occupant Classification Module (OCM) DTCs.
Q: Does the scan tool display any active DTCs relating to internal faults, ignition faults, or battery faults?
YES: Diagnose and repair the DTCs.
NO: Go To 2
2. VERIFY THAT DTC B1B93-PASSENGER SEAT TRACK POSITION SENSOR CIRCUIT LOW IS ACTIVE
With the scan tool, read OCM DTCs.
Q: Does the scan tool display active: B1B93-PASSENGER SEAT TRACK POSITION SENSOR CIRCUIT LOW?
YES: Go To 3
NO: Go To 7
3. INSPECT PASSENGER SEAT HARNESS WIRES & CONNECTORS
WARNING: TO AVOID PERSONAL INJURY OR DEATH, 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 chaffed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.
Q: Are any of these conditions present?
YES:
NOTE: 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.
Replace the Passenger Seat Harness. Perform OCS VERIFICATION TEST - VER 1. OCS Verification Test
NO: Go To 4
4. VERIFY THAT PASSENGER SEAT HARNESS IS ROUTED CORRECTLY
Verify that the Passenger Seat Harness is routed correctly.
Q: Is the Passenger Seat Harness routed correctly?
YES: Go To 5
NO: Reroute the Passenger Seat Harness as necessary. Perform OCS VERIFICATION TEST - VER 1. OCS Verification Test
5. CHECK (R262) SEAT POSITION SENSOR DATA-PASSENGER CIRCUIT & (R264) SEAT POSITION SENSOR VOLTAGE-PASSENGER CIRCUIT FOR A SHORT TO GROUND
Disconnect the Passenger Seat Track Position Sensor connector.
Disconnect the OCM C1 connector.
NOTE: Check connectors - Clean and repair as necessary.
Measure the resistance between the (R262) Seat Position Sensor Data-Passenger circuit and ground.
Measure the resistance between the (R264) Seat Position Sensor Voltage-Passenger circuit and ground..
Q: Is the resistance below 10k ohms on either circuit?
YES:
NOTE: 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.
Replace the Passenger Seat Harness. Perform OCS VERIFICATION TEST - VER 1. OCS Verification Test
NO: Go To 6
6. CHECK (R262) SEAT POSITION SENSOR DATA-PASSENGER CIRCUIT & (R264) SEAT POSITION SENSOR VOLTAGE-PASSENGER CIRCUIT FOR AN OPEN
Measure the resistance of the (R262) Seat Position Sensor Data-Passenger circuit between the OCM C2 connector and the Passenger Seat Track Position Sensor connector.
Measure the resistance of the (R264) Seat Position Sensor Voltage-Passenger circuit between the OCM C2 connector and the Passenger Seat Track Position Sensor connector.
Q: Is the resistance of either circuit above 5.0 ohms?
YES:
NOTE: 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.
Replace the Passenger Seat Harness. Perform OCS VERIFICATION TEST - VER 1. OCS Verification Test
NO: Replace the OCM. Perform OCS VERIFICATION TEST - VER 1. OCS Verification Test
7. TEST FOR AN INTERMITTENT CONDITION
With the scan tool, record and erase all DTCs from the OCM.
If any ACTIVE codes are present they must be resolved before diagnosing any stored codes.
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BEFORE PROCEEDING.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Look for chaffed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.
The following additional checks may assist you in identifying a possible intermittent problem.
Reconnect any disconnected components and harness connector.
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNITION ON, THEN RECONNECT THE BATTERY.
With the scan tool monitor active codes as you work through the following steps.
WARNING: TO AVOID PERSONAL INJURY OR DEATH, MAINTAIN A SAFE DISTANCE FROM ALL AIRBAGS WHILE PERFORMING THE FOLLOWING STEPS.
Wiggle the wiring harness and connectors of the related airbag circuit or component.
If only stored codes return continue the test until the problem area has been isolated.
In the previous steps you have attempted to recreate the conditions responsible for setting active DTC in question.
Q: Are any ACTIVE DTCs present?
YES: Select the appropriate symptom from Symptom List.
NO: No problem found at this time. Erase all codes before returning vehicle to customer.