62-11640
7–96
05017
CHECK ENG PREHEAT ENABLE CIRCUIT
• ACTIVATION: A problem has been detected in the engine preheat enable circuit (EPHT). If this alarm is
activated when the circuit is energized, the circuit is detected shorted. If this alarm is activated at any
other time, the circuit is detected open.
• UNIT CONTROL: Engine and Electric Operation: Alarm only.
• RESET CONDITION: Auto reset when circuit is normal, or alarm may be manually reset using the display
mounted keys or by turning the unit off, then back on again.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, the active
alarm should clear itself (refer to reset condition above). Operate the unit through the appropriate modes to see
if any active alarm occurs. Continue with the steps below as necessary.
CORRECTIVE ACTIONS:
1.
Check EPHT Wiring
Inspect 3MM and PCM connectors. Verify there is no damage to modules, and no damage, moisture,
or corrosion in connector.
2.
Check Engine Preheat Enable Circuit
a. Using Component Test Mode, refer to
, energize engine preheat circuit.
NOTICE
DO NOT leave the air intake circuit energized for the full 5 minutes if full amperage is shown,
as the intake air heater element life will be greatly shortened. NOTICE Circuit is energized
and amp draw displayed.
b. Check for power at 3MM-14 Must have minimum 11 VDC. If not, download data and replace main
microprocessor. For complete Main Microprocessor Module replacement instructions refer to
c. Check for power at PCM
−
27 Must have minimum 11 VDC. If not, check wiring and connectors
between 3MM
−
14 and PCM
−
27. Good continuity, no damage, moisture, or corrosion in connectors.
d. Replace PCM. Refer to
.
Summary of Contents for Vector 8500
Page 23: ...62 11640 1 6 1 3 SAFETY DECALS ...
Page 24: ...1 7 62 11640 62 03958 ...
Page 25: ...62 11640 1 8 ...
Page 26: ...1 9 62 11640 ...
Page 27: ...62 11640 1 10 ...
Page 125: ...62 11640 SECTION 6 MESSAGECENTER PARAGRAPH NUMBER Page 6 1 MESSAGECENTER MESSAGES 6 1 ...
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