[54C] SMART WIRING SYSTEM (SWS) USING SWS MONITOR <Hong Kong spec.> - - INPUT SIGNAL PROCEDURES - INSPECTION PROCEDURE P-15: The vehicle speed signal is not received.PRINT PAGE / INDEX / PRIOR / NEXT
INSPECTION PROCEDURE P-15: The vehicle speed signal is not received.
 CAUTION
 Whenever the ECU is replaced, ensure that the input signal circuit is normal.
COMMENTS ON TROUBLE SYMPTOM
The vehicle speed signal is used to operate the functions below. If the signal is abnormal, these functions will not work normally.
  • Windshield wiper and washer (vehicle speed-dependent wiper function)
  • Electric folding mirrors (automatic unfolding function)
POSSIBLE CAUSES
  • Malfunction of the engine-A/T-ECU
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. Use the MUT-II/III to confirm a diagnosis code.
Check if an A/T system diagnosis code is set.
Q: Is the check result normal?
YES:  Go to Step 2.
NO:  Diagnose the automatic transmission control system. Refer to <2000> or <2400>.
Step 2. Connector check: C-110 <2000> or C-136 <2400> engine-A/T-ECU connector and C-219 ETACS-ECU connector
Q: Is the check result normal?
YES:  Go to Step 3.
NO:  Repair the defective connector.
Step 3. Check the wiring harness between C-110 engine-A/T-ECU connector terminal No.80 <2000> or C-136 engine-A/T-ECU connector terminal No.73 <2400> and C-219 ETACS-ECU connector terminal No.63.
NOTE: Prior to the wiring harness inspection, check joint connector C-02 and intermediate connector C-105, and repair if necessary.
  • Check the input line for open circuit.
Q: Is the check result normal?
YES:  Go to Step 4.
NO:  Repair the wiring harness.
Step 4. Check the speedometer.
Check that the speedometer works normally.
Q: Is the check result normal?
YES:  Go to Step 5.
NO:  Replace the engine-A/T-ECU.
Step 5. Check the ETACS ANAL data by using the SWS monitor.
  • Enter a simulated vehicle speed.
Item No.
 Item name
 Normal conditions
Item 03
 SPEED SENSOR
 Displays the speed which fluctuates within ± 2 km/h from the entered vehicle speed.

OK: Normal condition is displayed.
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.
[54C] SMART WIRING SYSTEM (SWS) USING SWS MONITOR <Hong Kong spec.> - - INPUT SIGNAL PROCEDURES - INSPECTION PROCEDURE P-15: The vehicle speed signal is not received.PRINT PAGE / INDEX / PRIOR / NEXT
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