Security System

Security Control Unit Input Test (cont'd)

 22-257  

  1. If any tests indicate a problem, find and correct the cause, then recheck the system.
Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained
B8 WHT/RED Under all conditions Check for voltage to ground:

There should be battery voltage.
  • Blown No. 9 (10A) fuse in the under-hood fuse/relay box
  • An open in the wire
B7 WHT/BLK Under all condition Check for voltage to ground:

There should be battery voltage.
  • Blown No. 5 (10A) fuse in the under-hood fuse/relay box
  • An open in the wire
A11 YEL Ignition switch ON (II) Check for voltage to ground:

There should be battery voltage.
  • Blown No. 10 (7.5A) fuse in the under-dash fuse/relay box
  • An open in the wire
B16 BLK Under all conditions Check for continuity to ground:

There should be continuity.
  • Poor ground (G502 or G501: 5-door)
  • An open in the wire
B13 BLK/YEL Under all conditions Attach to ground:

The security indicator should come on.
  • Blown No. 10 (7.5A) fuse in the under-dash fuse/relay box
  • Faulty gauge assembly
  • An open in the wire
B2 GRN Under all conditions Attach to ground:

Security horn should sound
  • Blown No. 7 (15A) fuse in the under-hood fuse/relay box
  • Faulty security horn relay
  • Faulty security horn
  • An open in the wire
B4 BLU/RED Under all conditions Attach to ground:

Headlights should come on
  • Faulty headlight relay 1 or 2
  • An open in the wire
B5 BLU Under all conditions Attach to ground:

The taillights should come on.
  • Faulty taillight relay
  • An open in the wire
B9 RED/WHT Under all conditions Check for continuity to ground:

There should be continuity.
  • Poor ground (G503)
  • Faulty audio unit
  • An open in the wire
A6 LT GRN/BLK Under all conditions Check for continuity to ground:

There should be continuity
  • An open in the wire
A17 BLU/ORN Under all conditions Check for continuity to ground:

There should be continuity.
  • An open in the wire
B1 RED/YEL Ignition switch START (III) Starting the engine
  • Faulty security starter cut relay
  • An open in the wire
B14 GRN/RED Ignition switch OFF Attach to ground:

The turn signal lights should come on.
  • Blown No. 5 (10A) fuse in the under-hood fuse/relay box
  • Faulty turn signal switch
  • Faulty turn signal/hazard relay
  • An open in the wire
B6 GRN/YEL Ignition switch OFF
  1. Reconnect the connectors to the security control unit and perform the following input tests at the appropriate connector.
Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained
A20 GRN Driver's door open Check for voltage to ground:

There should be less than 1 V
  • Faulty driver's door switch
  • An open in the wire
Driver's door closed Check for voltage to ground:

There should be 5 V or more
A9 LT GRN/RED Front passenger's door open Check for voltage to ground:

There should be less than 1 V.
  • Faulty front passenger's door switch
  • An open in the wire
Front passenger's door closed Check for voltage to ground:

There should be 5 V or more.
B15 GRN/WHT Left rear door open Check for voltage to ground:

There should be less than 1 V.
  • Faulty left rear door switch
  • An open in the wire
Left rear door closed Check for voltage to ground:

There should be 5 V or more.
A19 GRN/WHT Right rear door open Check for voltage to ground:

There should be less than 1 V.
  • Faulty right rear door switch
  • An open in the wire
Right rear door closed Check for voltage to ground:

There should be 5 V or more.