Inspection Procedure 13: Seat belt reminder function does not work normally.


caution Before replacing the combination meter, be sure to check that the power supply circuit, earth circuit, and communication circuit are normal.

COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Malfunction of the seat belt switch (driver’s side)
  • Malfunction of the seat belt switch (passenger’s side)
  • Malfunction of the combination meter
  • Malfunction of the hazard indicator assembly
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE


STEP 1. Check the seat belt switch.



Q. Is the check result normal?





STEP 2. Resistance measurement at the seat belt switch (driver’s side) connector, seat belt switch (passenger’s side) connector


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the resistance between the seat belt switch (driver’s side) connector, seat belt switch (passenger’s side) connector (earth terminals) and the body earth.
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?





STEP 3. Check of open circuit (disconnect) in body earth line between seat belt switch (driver’s side) connector or seat belt switch (passenger’s side) and the body earth.


Q. Is the check result normal?





STEP 4. Check of short to power supply circuit (connect) in SBDS or SBAS line between combination meter connector and seat belt switch (driver’s side) connector or seat belt switch (passenger’s side) connector.


Q. Is the check result normal?





STEP 5. Check of short to power supply circuit (connect) in BWLP line between combination meter connector and hazard indicator assembly connector.


Q. Is the check result normal?





STEP 6. Retest the system.



Q. Is the check result normal?









STEP 7. Retest the system.



Q. Is the check result normal?