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Test A - Magnetic Reluctance Type Sensor
Testing is done on-vehicle.
DO NOT test vehicle speed or driveshaft type sensors since they require
vehicle motion.
Warning: Observe all safety precautions (see page ii) when testing sensor on
vehicle.
1) Verify ignition key is OFF.
2) Check Tester battery
Refer to page 1-4. Set RANGE switch to POWER
OFF when done.
3) Disconnect wiring harness from sensor - Inspect
for damage.
Some vehicles use a metal snap ring to secure
wiring harness to sensor. Remove this snap ring
before disconnecting wiring harness.
4) Connect test leads.
Refer to vehicle service manual for sensor pin
identification. Some connectors handle more than
one sensor. Test all sensors.
• YELLOW to one end of sensor coil pin.
• BLACK to other end of sensor coil pin.
5) Verify test clips make good contact and do not
touch each other.
Make sure unused clips are not touching anything.
6) Set RANGE switch to LOW.
7) Set FUNCTION switch to VOLTS.
8) Operate sensor - Watch TEST light for results.
(Note: Ignore any RICH / LEAN light flashes.)
–
Crankshaft/Camshaft sensor:
Crank engine.
STAY AWAY from moving engine parts.
RANGE
HIGH
LOW
POWER OFF
FUNCTION
VOLTS
OHMS
FREQUENCY
Crankshaft/Camshaft Position