Radiator Fan Switch Circuit Troubleshooting (Open) - Honda 2002 Accord Manual

Radiator Fan Switch Circuit
Troubleshooting (Open)
1. Disconnect the radiator fan switch 2P connector.
2. Turn the ignition switch ON (II).
3. Measure voltage between the No. 2 terminal of the
radiator fan switch 2P connector and body g r o u n d .
RADIATOR FAN SWITCH 2P
CONNECTOR
Wire side of
female terminals
Is there battery voltage?
Y E S - G o to step 4.
NO - R e p a i r open in the wire between the radiator
fan switch 2P connector terminal No. 2 and under-
hood fuse/relay b o x . H
4. Turn the ignition switch OFF, and check for
continuity between the No. 1 terminal of the
radiator fan switch 2P connector and body g r o u n d .
RADIATOR FAN SWITCH 2P
CONNECTOR
Wire side of
female terminals
Is there continuity?
Y E S - R e p l a c e the radiator fan switch.
Radiator Fan Switch Circuit
Troubleshooting (Short)
1. Remove the radiator f a n relay f r o m the under-hood
fuse/relay box, and test it (see page 22-52).
Is the relay OK ?
Y E S - G o t o step 2.
NO —Replace the radiator fan relay. •
2. Remove the radiator fan switch, and test it (see
page 10-22).
Is the radiator fan switch OK?
Y E S - G o to step 3.
NO —Replace the radiator fan switch. •
3. Disconnect ECM/PCM connector B (24P) and the
under-hood fuse relay box 14P connector.
4. Check for continuity between the No. 2 terminal of
the radiator fan switch 2P connector and body
ground.
R A D I A T O R F A N S W I T C H
2P C O N N E C T O R
W i r e s i d e o f
f e m a l e t e r m i n a l s
Is there continuity?
Y E S —Repair short in the w i r e between the radiator
fan switch 2P connector terminal No. 2 and under-
hood fuse/relay box. •
NO—Replace the under-hood fuse/relay box. •
NO —Check for an open in the w i r e between the
radiator fan switch 2P connector terminal No. 1 and
body ground. If the wire is OK, check for a poor
ground at G201.B
10-21