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Symptom Chart

SYMPTOM CHART

Condition Possible Sources Action
No communication with the vehicle security module.
  • Battery junction box (BJB) fuse 2 (30A).
  • Central junction box (CJB) fuse 2 (10A).
  • Circuitry.
  • Vehicle security module.
 REFER to MODULE COMMUNICATIONS NETWORK to continue communication diagnosis.
The horn is inoperative
  • Battery junction box (BJB) fuse 24 (20A).
  • Circuitry.
  • Horn relay.
  • Horn switch.
  • Horn.
 Go To PINPOINT TEST AB .
The horn is always on
  • Circuitry.
  • Clockspring.
  • Horn relay.
  • Horn switch.
  • Vehicle security module.
  • Tire pressure monitoring system module.
 Go To PINPOINT TEST AC .
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