## Entry Light Control System

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

22-133

5. With the connectors still disconnected, make these input tests at the connector.

- 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
K2 | BLU/ORN | Under all conditions | Check for continuity between the K2 terminal and the keyless receiver unit 5P connector No. 2 terminal: There should be continuity |

- An open in the wire

O7 | GRN/RED | Ceiling light switch in middle position | Attach to ground: Ceiling light(s) should come on |

- Blown No. 3 (7.5 A) fuse in the under-hood fuse/relay box
- Blown bulb
- Faulty ceiling light
- An open in the wire

X8 | WHT/BLK | Under all conditions | Attach to ground: Ignition key light should come on |

- Blown No. 3 (7.5 A) fuse in the under-hood fuse/relay box
- Faulty ignition key light
- An open in the wire

6. Reconnect the connectors to the under-dash fuse/relay box and make sure these input tests at the appropriate connectors on the under-dash fuse/relay box

- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, the multiplex control unit must be faulty, replace the under-dash fuse/relay box assembly.

Cavity | Wire | Test condition | Test: Desired result | Possible cause if result is not obtained
P18 | RED | Trunk lid [Tailgate] open | Check for voltage to ground: There should be 1 V or less |

- Poor ground (G601,[G553])
- Faulty trunk [Tailgate] latch switch
- An open in the wire

Trunk lid [Tailgate] closed | Check for voltage to ground: There should be 5 V or more |

- Faulty trunk latch switch
- Short to ground

Q2 | GRN/WHT | Left (right) rear door open | Check for voltage to ground: There should be 1 V or less |

- Faulty left (right) rear door switch
- An open in the wire

Left (right) rear door closed | Check for voltage to ground: There should be 5 V or more |

- Faulty left (right) rear door switch
- Short to ground

Q3 | GRN | Driver's door open | Check for voltage to ground: There should be 1 V or less |

- 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 |

- Faulty driver's door switch
- Short to ground

Q4 | LT GRN/RED | Front passenger's door open | Check for voltage to ground: There should be 1 V or less |

- 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 |

- Faulty front passenger's door switch
- Short to ground

X5 | RED/WHT | Ignition key inserted into the ignition switch | Check for voltage to ground: There should be 1 V or less |

- Poor ground (G401)
- Faulty ignition key switch
- An open in the wire

Ignition key removed from the ignition switch | Check for voltage to ground: There should be 5 V or more |

- Faulty ignition key switch
- Short to ground

Y8 | YEL/RED | Driver's door lock knob switch locked | Check for voltage to ground: There should be 1 V or less. |

- Poor ground (G501)
- Faulty driver's door lock knob switch
- An open in the wire

Driver's door lock knob switch unlocked | Check for voltage to ground: There should be 5 V or more |

- Faulty driver's door lock knob switch
- Short to ground