Titan 2WD V8-5.6L (VK56) (2004)
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A/F Sensor voltage (see Figure 2).
2.
Hold the engine speed at about 2000 rpm no-load for 2 minutes.
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This will create a stable condition for step 3 (below).
3.
Observe A/F SEN1 (B1) and A/F SEN1 (B2) voltage for 30 seconds while holding 2000 rpm no-load.
a.
A/F sensor voltages should remain (most of the time) between 1.37 and 1.57 volts.
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If the engine rpm is held constant, voltage will fluctuate, but should remain in this range.
b.
If, most of the time, the A/F sensor voltages are out of this range:
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The vehicle has an additional incident.
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This bulletin does not have repair information for an A/F Sensor or Fuel Management System incident.
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Use the appropriate Service Manual (ESM), section EC (P1031/P1051/P1148/P1168), to further diagnosis and repair the additional
incident.