Page 2480 - Foton Workshop Manual - Aumark (BJ1099)

62-428 DIAGNOSIS-COMBINATION METER

Diagnosis Procedure

• When the water temperature is too low, or the coolant temperature sensor resistance ≥
5KΩ, the coolant over-temperature indicator lamp does not turn on.
• When the coolant temperature sensor fails or the coolant temperature sensor circuit is
open, the coolant over-temperature indicator lamp does not turn on.
• When the coolant level is lower than the standard minimum scale, the coolant over-
temperature indicator lamp is always on.
• When the water temperature is too high (diesel engine water temperature ≥ 102 ℃ or
gasoline engine water temperature ≥ 110℃ ), the coolant over-temperature indicator lamp
will twinkle.
• When the coolant temperature sensor circuit is short circuit, the coolant over-temperature
indicator lamp will twinkle.
• Ignition switch: "ON", coolant over-temperature indicator lamp will turn on for about 3s,
and then turn off.
• Confirm that the coolant level is within standard scale.
• Confirm that the engine water temperature is normal.
• Ignition switch:"ON".

1. Read fault code by diagnostic device

(a). Connect the diagnostic device, read the
fault code, check whether there is a fault
code output in combination meter system
and engine system.

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Does the system have CAN communication fault?
Yes>The system has CAN communication fault, go to Step 5.
No >The system does not have CAN communication fault, go to Step 2.

2. Perform active test with diagnostic device

(a). Enter the instrument system, perform the action test, check whether the "Engine
Coolant Temperature Warning Lamp" works well.

Page 2480