## Security System

#### Security Control Unit Input Test (cont'd)

22-257

4. If any tests indicate a problem, find and correct the cause, then recheck the system.

- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, go to step 5.

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

5. Reconnect the connectors to the security control unit and perform the following input tests at the appropriate connector.

- If any test indicates a problem, find and correct the cause, then recheck the system.
- If the input tests prove OK, the security control unit internal circuit must be faulty.

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.