Diagnosis Procedure

INPUT SPEED SENSOR A

Diagnosis Procedure

1.CHECK INPUT SIGNAL
With CONSULT-III
1. Start engine.
2. Select "TCM INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Read out the value of "INPUT SPEED" while driving. Check the value changes according to driving speed.

OK or NG
OK - GO TO 8.
NG - GO TO 2.
2. CHECK INPUT SPEED SENSOR
With CONSULT-III
1. Start engine.
2. Check power supply to input speed sensor by voltage between TCM connector terminals. Main Power Supply And Ground Circuit and Input Speed Sensor A .

3. If OK, check the pulse when vehicle cruises.

OK or NG
OK - GO TO 8.
NG - GO TO 3.
3. CHECK POWER AND SENSOR GROUND
1. Turn ignition switch OFF.
2. Disconnect the input speed sensor harness connector.
3. Turn ignition switch ON.

4. Check voltage between input speed sensor harness connector terminals.

5. Check voltage between input speed sensor harness connector terminal and ground.

6. If OK, check harness for short to ground and short to power.
7. Reinstall any part removed.
OK or NG
OK - GO TO 4.
NG - 1 - Battery voltage is not supplied between terminals 1 and 3, terminals 1 and ground: GO TO 6.
NG - 2 - Battery voltage is not supplied between terminals 1 and 3 only: GO TO 7.
4. CHECK HARNESS BETWEEN TCM AND INPUT SPEED SENSOR
1. Turn ignition switch OFF.
2. Disconnect the input speed sensor harness connector.

3. Check continuity between TCM connector (A) terminal and input speed sensor harness connector (B) terminal.

4. If OK, check harness for short to ground and short to power.
5. Reinstall any part removed.
OK or NG
OK - GO TO 5.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK TCM
1. Check TCM input/output signal. TCM Terminal And Reference Value .
2. If NG, re-check TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK - GO TO 8.
NG - Repair or replace damaged parts.
6. CHECK HARNESS BETWEEN TCM AND INPUT SPEED SENSOR (POWER)
1. Turn ignition switch OFF.
2. Disconnect the input speed sensor harness connector.

3. Check continuity between TCM connector (A) terminals and input speed sensor harness connector (B) terminal. Circuit Diagram and Main Power Supply And Ground Circuit.

4. If OK, check harness for short to ground and short to power.
5. Reinstall any part removed.
OK or NG
OK - 10A fuse (No.49, located in the IPDM E/R) or ignition switch are malfunctioning.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
7. CHECK HARNESS BETWEEN TCM AND INPUT SPEED SENSOR (GROUND)
1. Turn ignition switch OFF.
2. Disconnect the input speed sensor harness connector.

3. Check continuity between TCM connector (A) terminal and input speed sensor harness connector (B) terminal.