[13B] MULTIPORT FUEL INJECTION (MPI) <4G64> - - TROUBLESHOOTING - INSPECTION PROCEDURE FOR DIAGNOSIS CODES - Code No. 24 Vehicle Speed Signal System | PRINT PAGE / INDEX / PRIOR / NEXT

Code No. 24 Vehicle Speed Signal System
FUNCTION The output shaft speed sensor signal used for A/T control is converted into a vehicle speed signal, which is inputted to the engine control system, speedometer, etc.
TROUBLE JUDGMENT Check Conditions 60 seconds later after the ignition switch has been in "ON" position or the engine has started up. Idling signal: OFF Engine speed of 2,000 r/min or more. Operation under high load (Volumetric efficiency 47.5 % or more). Judgment Criterion Sensor output voltage remains unchanged (no pulse signal is input) for 4 seconds.
PROBABLE CAUSE Failed output shaft speed sensor Open/short circuit in output shaft speed sensor circuit or loose connector contact Failed engine-A/T-ECU
| DIAGNOSIS PROCEDURE
| STEP 1. MUT-II/III self-diag code Q: A/T system diagnosis code output? YES: Check A/T system (Refer to GROUP 23A - Troubleshooting <A/T> - Check chart for diagnosis code ). NO: Go to Step 2 .
| STEP 2. Check the trouble symptoms. Q: Does trouble symptom persist? YES: Replace engine-A/T-ECU. NO: Intermittent malfunction (Refer to, GROUP 00 - How to Use Troubleshooting/Inspection Service Points ).

[13B] MULTIPORT FUEL INJECTION (MPI) <4G64> - - TROUBLESHOOTING - INSPECTION PROCEDURE FOR DIAGNOSIS CODES - Code No. 24 Vehicle Speed Signal System | PRINT PAGE / INDEX / PRIOR / NEXT

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