Air Intake Chamber Pressure Sensor (Service Code 7E) (DTC P0235, P0237)
Air Intake Chamber Pressure Sensor Output
Measure the output voltage at the air intake chamber
pressure sensor in the same way as input voltage in-
spection, note the following.
Disconnect the air intake chamber pressure sensor con-
nector and connect the measuring adapter [A] between
Main Harness [B]
Air Intake Chamber Pressure/Temperature Sensor [C]
Digital Meter [D]
Special Tool - Measuring Adapter: 57001-1700
Air Intake Chamber Pressure Sensor Output Voltage
Connections to Adapter:
Digital Meter (+) → Y (sensor R/G) lead
Digital Meter (–) → BK (sensor G) lead
Measure the output voltage with the engine stopped and
with the connector joined.
Turn the ignition switch on.
The output voltage changes according to local atmo-
Turn the ignition switch off.
If the reading is out of the usable range, replace the sen-
If the reading is within the usable range, remove the ECU
and check the wiring for continuity between main harness
Disconnect the ECU and sensor connectors.
Wiring Continuity Inspection
ECU Connector [A] ←→
Air Intake Chamber Pressure/Temperature Sensor
ECU terminal 83 [C] ←→ Sensor Terminal [D]
ECU terminal 38 [E] ←→ Sensor Terminal [F]
If the wiring is good, check the ECU for its ground and
power supply (see ECU Power Supply Inspection in the
Fuel System (DFI) chapter).
If the ground and power supply are good, replace the ECU
(see ECU Removal/Installation in the Fuel System (DFI)
DC 1.43 1.55 V at standard
atmospheric pressure (101.32 kPa,
SELF-DIAGNOSIS SYSTEM 17-113