2008T Troubleshooting Guide
P/N 490292 Rev. A
T- 1.5.677 EXTERNAL METER EXCEEDS 95° C
A) Return NTC #3’s connector to the 2
nd
distribution board position from the left, “MON-NTC”.
B) Replace Temperature control sensor
NTC #2* with a known good.THEN continue to part C. *To
LOCATE NTC #2 refer to Figure 42 (page 236).
C) Read before performing! Return to procedure number T- 1.5.1 (page 265) to see if the new NTC #2
fixed the problem. If (and ONLY if) you return to procedure number 1.5.677 continue to part D.
D) Swap in a known good Sensor Board* THEN continue to part E. *To LOCATE the board refer to Figure
4A (page 10)
E) Perform TWO (2) calibrations: Cal 1) Temp Control; Cal 2) Cond Cells THEN continue to part F.
F) Read before performing! Return to (ABOVE) procedure number T- 1.5.1 (page 265) to see if the new
board fixed the problem. If (and ONLY if) you return to procedure number 1.5.677 continue to part G.
G) Swap in a known good Functional Board THEN see part G
H) Perform FOUR (4) calibrations: Cal 1) Voltage Detection; Cal 2) Temp Sensor; Cal 3) Temp Control;
Cal 4) Cond Cells THEN continue to part I.
I) Read before performing! Return to (ABOVE) procedure number T- 1.5.1 (page 265) to see if the new
board fixed the problem. If (and ONLY if) you return to procedure number 1.5.677 the motherboard may
be bad.
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