Toyota Camry Manual page 324

BODY ELECTRICAL SYSTEM
VOLTAGE CHECK
(a) Establish conditions in which voltage is present at the
check point.
Example:
A–Ignition SW on
B–Ignition SW and SW 1 on
C–Ignition SW, SW 1 and Relay on (SW 2 off)
(b) Using a voltmeter, connect the negative (–) lead to a
good ground point or negative (–) battery terminal
and the positive (+) lead to the connector or compo–
nent terminal. This check can be done with a test bulb
instead of a voltmeter.
CONTINUITY AND RESISTANCE CHECK
(a) Disconnect the battery terminal or wire so there is no
voltage between the check points.
(b) Contact the 2 leads of an ohmmeter to each of the
check points.
If the circuit has diodes, reverse the 2 leads and check
again.
When contacting the negative (–) lead to the diode
positive (+) side and the positive (+) lead to the
negative (–) side, there should be continuity. When
contacting the 2 leads in reverse, there should be no
continuity.
HINT: Specifications may vary depending on the type
of tester, so refer to the tester's instruction manual
before performing the inspection.
Check LED (Light Emitting Diode) in the same manner
as that for diodes.
HINT:
Use a tester with a power source of 3 V or
greater to overcome the circuit resistance.
If a suitable tester is not available, apply battery
positive voltage and check that the LED lights up.
– GENERAL INFORMATION
BE–5