|
INSPECTION PROCEDURE
P-14: The vehicle speed signal is not received. <Except vehicles for GCC>
|
|  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)
|
| POSSIBLE CAUSES
- Malfunction of the engine-A/T-ECU
- Malfunction of the ETACS-ECU
- Damaged harness wires and connectors
|
| |
| |
| Step 1. Check if the A/T related diagnosis code
is set. Q: Is the diagnosis code set?
YES:
Diagnose the automatic transmission control system. (Refer to GROUP 23 -
Troubleshooting  <2400-4G64>
or <2400-4G69>)
NO:
Go to Step 2  .
|
| Step 2. Connector check: C-110 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 and C-219 ETACS-ECU connector terminal No.63. NOTE: Prior to the wiring harness inspection, check joint connector C-02 <LH drive
vehicles>
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. Retest the system.
Check that the vehicle speed signal is received 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.
|