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DESCRIPTION & OPERATION
The chassis-mounted ambient air temperature
sensor was not available with early-production
engines. It was phased into production beginning
approximately mid-July 1999 for CX model
chassis, mid-September 1999 for CH, CL, RD8,
MR, DM and DMM model chassis and early
November 1999 for RD6, RB and LE model
chassis. The sensor is mounted off-engine and
supplies temperature input to the engine
electronic control unit (EECU), so that the V-MAC
system can determine a more accurate indication
of inlet air temperature.
Location of the sensor depends upon chassis
model, but in general, it is located at the front of
the chassis mounted either on the front
crossmember behind the bumper, on a hood
hinge, hood hinge bracket, body, spring bracket,
or grille guard assembly.
10
Figure 10 — V-MAC III Engine-Mounted Sensor Locations (Pre-Left-Side Redesign)
1. Fuel Temperature Sensor (Behind Fittings)
2. Dash Gauge Coolant Temperature Sensor
3. V-MAC III Coolant Temperature Sensor
4. Boost Air Temperature Sensor
5. Engine Speed Sensor (on Left Side of Flywheel Housing)
6. Dash Gauge Oil Temperature Sensor (on Left Side of Oil
Pan)
7. Oil Pressure Sensor
8. Engine Position Sensor (on Engine Front Cover)
5_106_00.bk Page 18 Friday, August 4, 2000 11:17 AM
BDC for engine manuals and specs
