Manifold Absolute Pressure MAP/BARO
2-29
Location
The sensor is mounted either on the bulkhead, air
cleaner, throttle body or elsewhere in the engine
compartment. A vacuum hose connects the sensor
to a strong source of manifold vacuum. (Some new
MAP sensor types may be directly mounted to the
manifold, eliminating the vacuum hose connection.)
The BARO sensors are vented to the atmosphere -
there is no vacuum hose attached.
Some Honda engines locate the MAP sensor inside
a control box containing several vacuum hoses and
solenoids.
When to Test
• Related trouble codes sent by computer.
• No start, hard starting, stalling, rough idle,
hesitation, stumble, surging, poor fuel economy,
black exhaust smoke, knocking, backfiring,
catalytic converter overheating or no torque
converter lock-up.
Signal
Power
Signal
GroundPower
Signal
Ground Power
Ground
TOYOTA
HONDA
GM/CHRYSLER
MAP Signal
Power
Ground
MAP Signal
Ground
Power
FORDVehicle
Harness
Connectors
for MAP
Sensor
(Mating side of
connector shown.)
Refer to vehicle service manual for connectors not shown.
