Key-in, Light-on, Seat Belt Reminder Control Circuit Input Test

1.Remove the gauge assembly.

2.Disconnect the connectors from the gauge assembly.

NOTE: All connectors are wire side of female terminals.

 

3.Inspect the connector and socket terminals to be sure they are all making good contact.

  • If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
  • If the terminals are OK, go to 4.

4.Wire the connectors still disconnected, make these input tests at the connectors.

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

Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 
A1 WHT/RED Under all conditions Check for voltage to ground:
There should be battery voltage. 
  • Blown No. 8 (15A) fuse in the under-hood fuse/relay box
  • An open in the wire
 
A2 YEL Ignition switch ON (II) Check for voltage to ground:
There should be battery voltage. 
  • Blown No. 3 (7.5A) fuse in the under-dash fuse/relay box
  • An open in the wire
 
A9 BLK Under all conditions Check for voltage to ground:
There should be continuity. 
  • Poor ground (G401)
  • An open in the wire
 
A3 RED/BLK Combination light switch ON Check for voltage to ground:
There should be battery voltage. 
  • Blown No. 9 (10A) fuse in the under-hood fuse/relay box
  • Faulty taillight relay
  • Faulty combination light switch
  • An open in the wire
 

5.Reconnect the connectors, and make these input tests at the connector.

  • If any test indicates a problem, find and correct the cause, then recheck the system.
  • If all input test prove OK, the gauge assembly must be faulty: replace it.

Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 
C11 BLU/RED 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 inserted into the ignition switch Check for voltage to ground:
There should be 5 V or more. 
A14 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. 
C4 BLU/RED Driver's seat belt is unbuckled Check for voltage to ground:
There should be 1 V or less. 
  • Faulty driver's seat belt switch
  • Poor ground (G501)
  • An open in the wire
 
Driver's seat belt buckled Check for voltage to ground:
There should be 5 V or more. 

NOTE: Seat belt reminder, key-in reminder system is KK and KU models only.