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Keyless Entry/Security Alarm System
Control Unit Input Test (cont'd)
4. W i t h the driver's multiplex control unit still disconnected, make these input tests at the connector and driver's
under-dash fuse/relay box sockets.
• If any test indicates a p r o b l e m , find and correct the cause, then recheckthe system.
• If all the input tests prove OK go to step 5.
Cavity
W i r e
Test condition
Test: Desired result
Possible cause if result is not obtained
B11
BLK
Under all
conditions
Check for continuity to
g r o u n d :
There should be continuity.
• Poor ground (G503)
• An open in the wire
A12
Fuse/relay
box socket
Under all
conditions
Check for voltage to ground:
There should be battery
voltage.
• Blown No. 13 (7.5A) fuse in the
passenger's under-dash fuse/
relay box
• An open in the w i r e
A24
Fuse/relay
box socket
Ignition switch ON
(ID
Check for voltage to ground:
There should be battery
voltage.
• Blown No. 9 (7.5A) fuse in the
driver's under-dash fuse/relay
box
• An open in the wire
A10
Fuse/relay
box socket
Headlight switch
ON (ID) and j u m p
A10 to battery
voltage
The headlights should come
on.
• Poor ground (G401)
• Faulty headlight relay 1 or 2
• An open in the wire
• Faulty combination light switch
A5
Fuse/relay
box socket
Under all
conditions
Attach to g r o u n d : The
security indicator should
come on.
• Blown No. 13 (7.5A) fuse in the
passenger's under-dash fuse/
relay box
• Faulty security indicator
• An open in the wire
A22
Fuse/relay
box socket
Combination light
switch ON
Check for continuity t o
g r o u n d :
There should be continuity.
• Poor ground (G401)
• Faulty combination light switch
• An open in the wire
A22
Fuse/relay
box socket
Combination light
switch OFF
Check for continuity to
g r o u n d :
There should be no continuity.
• Poor ground (G401)
• Faulty combination light switch
• An open in the wire
B16
RED/GRN
Combination light
switch OFF
Check for continuity to
g r o u n d :
There should be no continuity.
• Faulty taillight relay
• Faulty combination light switch
• An open in the w i r e
B16
RED/GRN
Combination light
switch ON and
j u m p B 1 6 t o
battery voltage
The taillights should come on.
• Faulty taillight relay
• Faulty combination light switch
• An open in the w i r e
22-218
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Troubleshooting
