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–
+
ELEC
SIGNALING SYSTEM
COUPLERS AND LEADS CONNECTION
INSPECTION
1. Check:
• Couplers and leads connection
Rust/dust/looseness/short-circuit
→
Repair or replace.
MULTI-FUNCTION DISPLAY INPUT
VOLTAGE INSPECTION
1. Disconnect the multi-function display cou-
pler.
2. Set the main switch to “ON”.
3. Measure:
• Multi-function display input voltage
Out of specification
→
Replace wire har-
ness.
CAUTION:
Make sure that a short-circuit does not
develop between the terminals because it
may cause damage to electrical compo-
nents.
Tester (+) lead
→
Brown lead
1
Tester (–) lead
→
Black lead
2
Multi-function dis-
play input voltage
Tester selec-
tor position
10 V or more
DCV-20
MULTI-FUNCTION DISPLAY OUTPUT
VOLTAGE INSPECTION
1. Disconnect the multi-function display cou-
pler.
2. Set the main switch to “ON”.
