Acura CSX. Manual — part 92
*10
Fuel Cap Warning Message
To make the message go off (with the HDS)
To make the message go off (without the
HDS) (’06 model)
To make the message go off (without the
HDS) (’07-09 models)
First drive cycle
Procedure
Procedure
Procedure
11-42
Fuel and Emissions Systems
A
Shows CHECK FUEL CAP
in the gauge display.
The ECM/PCM detects a loose or missing fuel fill cap as
an evaporative system leak, and alarts the driver by
showing a warning message in the gauge display.
The first time a leak is detected a CHECK FUEL CAP
message is shown in the gauge display (A). To scroll to
another message, press the select/reset button. The
CHECK FUEL CAP message appears each time you
restart the engine until the system turns the message
off. Turn the engine off, then replace or tighten the fuel
fill cap until it clicks at least once.
1. Tighten the fuel fill cap until it clicks.
2. Clear the Temporary DTC with the HDS.
3. Verify there is no leak by doing the EVAP
FUNCTION TEST in the INSPECTION MENU with
the HDS.
1. Tighten the fuel fill cap until it clicks.
2. The message should go off after several days of
normal driving.
1. Tighten the fuel fill cap until it clicks.
2. Start the engine, then turn the ignition switch to
LOCK (0).
3. Repeat step 2 two more times.
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14
Electronic Throttle Control System Diagram
11-43
TP SENSOR A
TP SENSOR B
THROTTLE
ACTUATOR
THROTTLE
BODY
From
ETCS CONTROL
RELAY
VARIOUS
SENSORS
ECM/
PCM
APP
SENSOR A
APP
SENSOR B
BRN
YEL
BLU
PUR
LT BLU
GRY
BLK
YEL
GRN
RED/BLU
BLU
BLU/RED
GRN/YEL
RED/BLK
The electronic throttle control system consists of the throttle actuator, throttle position (TP) sensor A/B, accelerator
pedal position (APP) sensor A/B, the electronic throttle control system (ETCS) control relay, and the ECM/PCM.
* : This illustration shows K20Z2 engine
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*11
Exhaust Gas Recirculation (EGR) System Diagram (K20Z2 engine)
11-44
Fuel and Emissions Systems
INTAKE MANIFOLD
EGR VALVE
EGR VALVE
POSITION SENSOR
YEL/BLU
GRN/BLK
WHT/BLK
BLU/RED
BLK/RED
(BLK)
BLK
ECM/PCM
VARIOUS
SENSORS
* : ’07-09 models
*
The EGR system reduces oxides of nitrogen (NOx) emissions by recirculating exhaust gas through the EGR valve and
the intake manifold into the combustion chambers. The ECM/PCM memory includes the ideal EGR valve position for
varying operating conditions.
The EGR valve position sensor detects the amount of EGR valve lift and sends it to the ECM/PCM. The ECM/PCM then
compares it with the ideal lift in its memory (based on signals sent from other sensors). If there is any difference
between the two, the ECM/PCM cuts current to the EGR valve.
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*12
Evaporative Emission (EVAP) Control Diagram
11-45
ATMOSPHERE
ATMOSPHERE
FUEL FILL
CAP
FUEL TANK VAPOR
RECIRCULATION
TUBE
FUEL TANK VAPOR
CONTROL VALVE
VARIOUS
SENSORS
FUEL TANK
FTP SENSOR
EVAP CANISTER
VENT SHUT VALVE
PUR
LT GRN
ECM/PCM
BLK
YEL
YEL/BLU
BLK/YEL
RED
BLU
BLK
LT GRN
From
No. 3
ALTERNATOR
(10 A) FUSE
From
PGM-FI
SUBRELAY
EVAP
CANISTER
EVAP CANISTER
PURGE VALVE
ATMOSPHERE
The EVAP controls minimize the amount of fuel vapor escaping into the atmosphere. Vapor from the fuel tank is
temporarily stored in the EVAP canister until it can be purged from the canister into the engine and burned.
The EVAP canister is purged by drawing fresh air through it and into a port on the intake manifold.
The purging vacuum is controlled by the EVAP canister purge valve, which operates whenever engine coolant
temperature is above 60 °C (140 °F).
* : This illustration shows K20Z2 engine
08/08/21 14:13:44 61SNR030_110_0045
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