[54E] SMART WIRING SYSTEM (SWS) USING SWS MONITOR <Except for Hong Kong spec.> - - SYMPTOM PROCEDURES - SEAT BELT WARNING LAMP <VEHICLES FOR AUSTRALIA> - INSPECTION PROCEDURE K-1: The seat belt warning lamp does not flash normally. <Vehicles for Australia>PRINT PAGE / INDEX / PRIOR / NEXT
SEAT BELT WARNING LAMP <VEHICLES FOR AUSTRALIA>
INSPECTION PROCEDURE K-1: The seat belt warning lamp does not flash normally. <Vehicles for Australia>
 CAUTION
 Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.
COMMENTS ON TROUBLE SYMPTOM
The ETACS-ECU flashes the seat belt warning lamp in accordance with the input signal from the ignition switch (IG1).
If it does not flash normally, these input signal circuit(s) or the ETACS-ECU may be defective.
POSSIBLE CAUSES
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. SWS monitor data list
Check the SWS communication signal, which is related to the seat belt warning lamp.
<Selected item> ETACS ECU
  • Ignition switch: ON
Item No.
 Item name
 Normal condition
Item 30
 IG SW(IG1)
 ON

OK: Normal condition is displayed.
Q: Is the check result normal?
YES:  Go to Step 2.
NO:  Refer to Inspection Procedure P-2 "The ignition switch (IG1) signal is not received ."
Step 2. Connector check: C-04 and C-05 combination meter connectors
Q: Is the check result normal?
YES:  Go to Step 3.
NO:  Repair the defective connector.
Step 3. Check the seat belt warning lamp.
  1. Disconnect the C-04 and C-05 combination meter connectors, and check at the equipment side.
  1. When you connect the positive battery terminal to C-04 combination meter connector terminal No.42 and the negative battery terminal to C-05 combination meter connector terminal No.5 respectively, check that the seat belt warning lamp should illuminate.
Q: Is the check result normal?
YES:  Go to Step 4.
NO:  Replace the combination meter.
Step 4. Measure the voltage at the C-04 combination meter connector.
  1. Disconnect the connector, and measure at the wiring harness side.
  1. Voltage between C-04 combination meter connector No.42 and body earth
    2. OK: Battery positive voltage
Q: Is the check result normal?
YES:  Go to Step 6.
NO:  Go to Step 5.
Step 5. Check the wiring harness between C-04 combination meter connector terminal No.42 and the ignition switch (IG1).
NOTE: Prior to the wiring harness inspection, check junction block connectors C-203 and C-205, and repair if necessary.
  • Check the power supply line for open circuit.
Q: Is the check result normal?
YES:  The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
NO:  Repair the wiring harness.
Step 6. Connector check: C-219 ETACS-ECU connector
Q: Is the check result normal?
YES:  Go to Step 7.
NO:  Repair the defective connector.
Step 7. Check the wiring harness between C-05 combination meter connector terminal No.5 and C-219 ETACS-ECU connector terminal No.73.
  • Check the input and output lines for open circuit.
Q: Is the check result normal?
YES:  Go to Step 8.
NO:  Repair the wiring harness.
Step 8. Retest the system.
Check that the seat belt warning lamp flashes normally.
Q: Is the check result normal?
YES:  The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
NO:  Replace the ETACS-ECU.
[54E] SMART WIRING SYSTEM (SWS) USING SWS MONITOR <Except for Hong Kong spec.> - - SYMPTOM PROCEDURES - SEAT BELT WARNING LAMP <VEHICLES FOR AUSTRALIA> - INSPECTION PROCEDURE K-1: The seat belt warning lamp does not flash normally. <Vehicles for Australia>PRINT PAGE / INDEX / PRIOR / NEXT
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