Transmission Control Systems
TROUBLE CODE 23 - ENGINE REVOLUTION SIGNALCONTENT OF DIAGNOSIS:
Engine revolution input signal circuit is open or shorted.
TROUBLE SYMPTOM:
No lockup occurs (after engine warm-up)
Power indicator remains on when vehicle speed is 0 mph
1. MEASURE SIGNAL VOLTAGE INPUT OF TCU.
1) Turn ignition switch ON (with engine OFF).
2) Measure signal voltage input of TCU.
(Connector) terminal: Specified voltage
(B44) No.5 - Body: 10 V, min.
2. CHECK HARNESS BETWEEN TCU AND ECU (MPFI).
1) Disconnect connector from TCU.
2) Disconnect connector from ECU.
3) Measure resistance between TCU connector and ECU connector.
Connector & terminal/ Specified resistance
(B44) No.5 - (B56) No.16: 0 hms
(B44) No.5 - Body: 1 M Ohm min.