W/Harness Inspection

P0501 Vehicle Speed Sensor A Range/Performance

Inspection/Repair - W/Harness Inspection

Terminal and Connector Inspection

ABS Vehicle
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 "Signal Circuit Inspection" procedure.
Non-ABS Vehicle
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 "Power Circuit Inspection" procedure.

Power Supply Circuit Inspection

Non-ABS Vehicle
1. Key "ON".
2. Measure voltage between terminal 1/E50 of the wheel speed sensor harness connector and chassis ground. (Connect wheel speed sensor connector)
A. Specification : Approx. B+




3. Is the measured voltage within specification?
YES
1) Go to "Signal Circuit Inspection" procedure.
NO
1) Repair open or short to ground in harness, and go to "Verification of Vehicle Repair" procedure.

Signal Circuit Inspection

ABS Vehicle
1. Check short to ground in harness
(1) Key "OFF".
(2) Disconnect PCM connector.
(3) Disconnect ABS control unit.
(4) Measure resistance between terminal 20/C01-1 of PCM harness connector and chassis ground. [A/T]
Measure resistance between terminal 64/C01 of ECM harness connector and chassis ground. [M/T]
A. Specification : Infinite








(5) Is the measured resistance within specification?
YES
1) Go to "Check open in harness" as follows.
NO
1) Repair short to ground in harness, and go to "Verification of Vehicle Repair" procedure.
2. Check for open in harness
(1) Key "OFF".
(2) Disconnect PCM connector.
(3) Disconnect ABS control unit.
(4) Measure resistance between terminal 20/C01-1 of PCM harness connector and terminal 3/E51 of ABS control module harness connector. (A/T)
Measure resistance between terminal 64/C01 of ECM harness connector and terminal 3/E51 of ABS control module harness connector. (M/T)
A. Specification : Approx. below 1 Ohms








(5) Is the measured resistance within specifications?
YES
1) Go to "Component inspection" procedure.
NO
1) Repair Open circuit and then, go to "Verification of Vehicle Repair" procedure.
Non-ABS Vehicle
1. Check short to ground in harness.
(1) Key "OFF".
(2) Disconnect PCM connector.
(3) Disconnect wheel speed sensor connector.
(4) Measure resistance between terminal 2/E50 of wheel speed sensor harness connector and chassis ground.
A. Specification : Infinite




(5) Is the measured resistance within specifications?
YES
1) Go to "Check open in harness" as follows.
NO
1) Repair short to ground in harness, and go to "Verification of Vehicle Repair" procedure.
2. Check open in harness
(1) Key "OFF".
(2) Disconnect PCM connector.
(3) Disconnect wheel speed sensor connector.
(4) Measure resistance between terminal 60/C01-2 of PCM harness connector and terminal 2/E50 harness connector.
Measure resistance between terminal 79/C01 of ECM harness connector and terminal 2/E50 harness connector.
A. Specification : Approx. below 1 Ohms




(5) Is the measured resistance within specifications?
YES
1) Go to "Component inspection" procedure.
NO
1) Repair Open circuit and then, go to "Verification of Vehicle Repair" procedure.