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INSPECTION PROCEDURE
P-15: The vehicle speed signal is not received.
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|  CAUTION
Whenever the ECU is replaced,
ensure that the input signal circuit is normal.
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| 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.
- Door-ajar warning function
- Windshield wiper and washer (vehicle speed-dependent wiper function)
- Electric folding mirrors (automatic unfolding function)
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| POSSIBLE CAUSES
- Malfunction of the engine-A/T-ECU
- Malfunction of the ETACS-ECU
- Damaged harness wires and connectors
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| 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>.
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| 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 connector.
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| 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 twerminal No.79 <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.
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| 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.
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| 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.
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