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Engine Start Alarm Circuit
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 589 PID: S121 SPN: 611 FMI: 4/4 LAMP: Yellow SRT: |
Less than + 6 VDC detected at the engine start alarm circuit when high voltage was expected by the ECM. |
The ICON™ idle control system will be disabled. Only mandatory shutdown will be enabled. Engine can be started normally. |
 Engine Start Alarm Circuit
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Circuit Description
The engine start alarm circuit turns on the audible engine start alarm to warn of an impending automatic engine start.
Component Location
The engine start alarm is located on the vehicle’s fire wall on the intake side of the engine.
Shop Talk
This fault typically indicates an open circuit between the alarm coil (pins A and B), or from pin B of the alarm to battery voltage, or from pin A of the alarm to pin 32 of the ECM. Another typical cause for this fault code is a short circuit from pin A or B of the alarm, or from ECM pin 32 to ground. The alarm must sound for 14 seconds before an engine start. The alarm is actuated by supplying a signal from pin 25 of the ECM connector to pin B of the alarm connector.
Refer to Troubleshooting Fault Code t05-589
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