Diagnostic Routine H
Diagnostic Routine H
Diagnostic Overview
Input Shaft Speed Sensor 1 or 2 Fault
Refer to Wiring Diagram Set 29 for schematic and connector information Electrical Diagrams.
Normal Operation and Fault Conditions
Input shaft speed sensor 1 measures the input speed and the rotating direction of input shaft 1. The input shaft can be stationary. Therefore it is necessary, that the sensor system can detect the stationary state of the input shaft accurately. By being stationary the sensor must not indicate speed unequal to 0 (also not, if the motor runs by high speeds). The slow rolling of the car has to be detected safely. Input shaft speed sensor 2 measures the input speed of input shaft 2. The rotation direction is not measured.
DTC Fault Trigger Conditions
Pinpoint Test
1. Read and record all DTCs (Diagnostic Trouble Codes).
Were input shaft speed sensor 1 and 2 DTCs (Diagnostic Trouble Codes) set?
2. Check the input shaft speed sensor 1 power circuit for voltage
1. Ignition OFF.
2. Disconnect the input shaft speed sensor 1 C143.
3. Inspect the connector for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.
4. Ignition ON.
5. Measure for voltage on the input shaft speed sensor 1 power circuit (PK/GN) from the input shaft speed sensor 1 C143-1 to ground.
Is voltage greater than 10.5 volts?
3. Check the input shaft speed sensor 1 return circuit
1. Measure for voltage on the input shaft speed sensor 1 return circuit (GN/BN) from the input shaft speed sensor 1 C143-1 to the input shaft speed sensor 1 C143-2.
Is voltage greater than 10.5 volts?
4. Check the input shaft speed sensor 1 circuits for an open
1. Ignition OFF.
2. Disconnect the input shaft speed sensor 1 C143 and TCM (Transmission Control Module) C1750B.
3. Inspect the connectors for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.
4. Measure the resistance of the input shaft speed sensor 1 circuits of the transaxle vehicle harness from the TCM (Transmission Control Module) C1750B to input shaft speed sensor 1 C143.
Is the resistance less than 5 ohms on each circuit?
5. Check the input shaft speed sensor 1 circuits for a short to ground
1. Measure the resistance of the input shaft speed sensor 1 circuits of the transaxle vehicle harness from the input shaft speed sensor 1 C143 to ground.
Is the resistance greater than 10,000 ohms on each circuit?
6. Check the input shaft speed sensor 2 power circuit for voltage
1. Ignition OFF.
2. Disconnect the input shaft speed sensor 2 C164.
3. Inspect the connector for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.
4. Ignition ON.
5. Measure for voltage on the input shaft speed sensor 1 power circuit (BU) from the input shaft speed sensor 2 C164-1 to ground.
Is voltage greater than 10.5 volts?
7. Check the input shaft speed sensor 2 return circuit
1. Measure for voltage on the input shaft speed sensor 2 return circuit (WH/BU) from the input shaft speed sensor 2 C164-1 to the input shaft speed sensor 2 C164-2.
Is voltage greater than 10.5 volts?
8. Check the input shaft speed sensor 2 circuits for an open
1. Ignition OFF.
2. Disconnect the input shaft speed sensor 2 C164 and TCM (Transmission Control Module) C1750B.
3. Inspect the connectors for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.
4. Measure the resistance of the input shaft speed sensor 2 circuits of the transaxle vehicle harness from the TCM (Transmission Control Module) C1750B to input shaft speed sensor 2 C164.
Is the resistance less than 5 ohms on each circuit?
9. Check the input shaft speed sensor 2 circuits for a short to ground
1. Measure the resistance of the input shaft speed sensor 2 circuits of the transaxle vehicle harness from the input shaft speed sensor 2 C164 to ground.
Is the resistance greater than 10,000 ohms on each circuit?
