W/Harness Inspection
Terminal and Connector Inspection
1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration or damage.
3. Has a problem been found?
YES
1) Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
1) Go to "REAR SPEED SENSOR output harness Signal Inspection" procedure.
REAR SPEED SENSOR output harness Signal Inspection
1. Engine : Idling.
2. TRANSFER SPEED SENSOR connector : Connect.
3. Monitor signal waveform between terminal 02 of SPEED SENSOR harness connector
4. Select Mode s/w to 4L or 4H Mode & Shift to L Range.
A. Specification : Signal Waveform & Data
CAUTION:
The above value is only for reference. The actual value may differ from it according to various engine condition.
5. Is FRONT SPEED SENSOR display near the specified value?
YES
1) Fault is intermittent caused by poor contact in the sensor's and/or TCCU's connector or was repaired and TCCU memory was not cleared.Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
NO
1) Go to "REAR SPEED SENSOR output harness battery short Inspection" procedure.
REAR SPEED SENSOR output harness battery short Inspection
1. IG "OFF"
2. REAR SPEED SENSOR connector : Disconnect.
3. IG "ON" & ENG "OFF".
4. Measure voltage between terminal 02 of REAR SPEED SENSOR harness connector
A. Specification : 0V below.
CAUTION:
The above value is only for reference. The actual value may differ from it according to various engine condition.
5. Is resistance display near the specified value?
YES
1) Go to "REAR SPEED SENSOR output harness open circuit inspection" procedure.
NO
1) Check for short to battery in output harness.
2) Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
REAR SPEED SENSOR output harness open circuit inspection
1. IG "OFF"
2. REAR SPEED SENSOR, TCCU connector : Disconnect.
3. Measure resistance between terminal 02 of REAR SPEED SENSOR harness connector
A. Specification : 1 Ohm below.
CAUTION:
The above value is only for reference. The actual value may differ from it according to various engine condition.
4. Is resistance display near the specified value?
YES
1) Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration or damage.
2) Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
NO
1) Check for open circuit of output harness.
2) Repair as necessary and then go to "Verification of Vehicle Repair" procedure.