Acura CSX. Instruction — page 99

Evaporative Emission (EVAP) Control
System Monitor and Readiness Code

Air Fuel Ratio (A/F) Sensor Monitor and
Readiness Code

Enable Criteria

Procedure

Enable Criteria

Procedure

11-70

Fuel and Emissions Systems

NOTE: All readiness codes are cleared when the battery
is disconnected, if the DTCs have been cleared, or if the
ECM/PCM is reset with the HDS.

• Battery voltage is more than 10.5 V.
• Engine at idle.
• ECT SENSOR 1 and ECT SENSOR 2 between 80 °C

(176 °F) and 100 °C (212 °F).

• MAP SENSOR less than 46.6 kPa (350 mmHg,

14 in.Hg).

• Vehicle speed (VSS) 0 km/h (0 mph).
• IAT SENSOR between 0 °C (32 °F) and 100 °C (212 °F).

1. Connect the HDS to the DLC.

2. Start the engine.

3. Select EVAP TEST in the INSPECTION MENU with

the HDS, then select the FUNCTION TEST in the
EVAP TEST MENU.

• If the result is normal, readiness is complete.
• If the result is not normal, go to the next step.

4. Check for a Temporary DTC. If there is no DTC, one

or more of the enable criteria were probably not
met; repeat the procedure.

NOTE:

• Do not turn the ignition switch to LOCK (0) or ACC (I)

during the procedure.

• All readiness codes are cleared when the battery is

disconnected, if the DTCs have been cleared, or if the
ECM/PCM is reset with the HDS.

ECT SENSOR 1 at 60 °C (140 °F) or more.

1. Start the engine.

2. Test-drive the vehicle under stop-and-go conditions

with short periods of steady cruise. During the
drive, decelerate (with the throttle fully closed) for
5 seconds. After about 5.6 km (3.5 miles), the
readiness code should switch from incomplete to
complete.

3. Check the readiness codes screen for the air fuel

ratio (A/F) sensor in the DTCs MENU with the HDS.

• If the screen shows complete, readiness is

complete.

• If the screen shows not complete, go to the next

step.

4. Check for a Temporary DTC. If there is no DTC, the

enable criteria was probably not met. Select the
DATA LIST MENU. Check the ECT SENSOR 1 in the
ALL DATA LIST with the HDS. If the ECT SENSOR 1
is less than 60 °C (140 °F), run the engine until it is
more than 60 °C (140 °F), then repeat the procedure.

08/08/21 14:15:32 61SNR030_110_0070

Air Fuel Ratio (A/F) Sensor Heater Monitor
Readiness Code

Misfire Monitor and Readiness Code

Fuel System Monitor and Readiness Code

Comprehensive Component Monitor and
Readiness Code

EGR Monitor and Readiness Code

Procedure

Enable Criteria

Procedure

11-71

NOTE: All readiness codes are cleared when the battery
is disconnected, if the DTCs have been cleared, or if the
ECM/PCM is reset with the HDS.

1. Start the engine, and let it idle for 1 minute. The

readiness code should switch from incomplete to
complete.

2. If the readiness code is still not set to complete,

check for a Temporary DTC. If there is no DTC,
repeat the procedure.

• This readiness code is always set to available

because misfiring is continuously monitored.

• Monitoring pauses, and the misfire counter resets, if

the vehicle is driven over a rough road.

• Monitoring also pauses, and the misfire counter

holds at its current value, if the throttle position
changes more than a predetermined value, or if
driving conditions fall outside the range of any
related enable criteria.

• This readiness code is always set to available

because the fuel system is continuously monitored
during closed loop operation.

• Monitoring pauses when the catalytic converter,

EVAP control system, and A/F sensor monitors are
active.

• Monitoring also pauses when any related enable

criteria are not being met. Monitoring resumes when
the enable criteria is again being met.

This readiness code is always set to available because
the comprehensive component monitor is continuously
running whenever the engine is cranking or running.

NOTE:

• Do not turn the ignition switch to LOCK (0) or ACC (I)

during the procedure.

• All readiness codes are cleared when the battery is

disconnected, if the DTCs have been cleared, or if the
ECM/PCM is reset with the HDS.

ECT SENSOR 1 at 80 °C (176 °F) or more.

1. Connect the HDS to the DLC.

2. Start the engine.

3. Drive at a steady speed with the A/T in D position or

M/T in 4th gear, at 80

100 km/h (50

62 mph) or

above for more than 10 seconds.

4. With the A/T in D position or M/T in 4th gear,

decelerate from 100 km/h (62 mph) or above by
completely releasing the throttle for at least
5 seconds. If the engine is stopped during this
procedure, go to step 3 and do the procedure again.

5. Check the OBD status screen for DTC P0401 in the

DTC’s MENU with the HDS.

• If it is PASSED, readiness is complete.
• If it is not PASSED, go to step 3 and retest.

08/08/21 14:15:32 61SNR030_110_0071

*01

SNR9A00A20326900000DAAT00

11-72

PGM-FI System

Component Location Index

IGNITION COILS

CAMSHAFT POSITION (CMP)
SENSOR B (EXHAUST SIDE)

ELECTRICAL LOAD
DETECTOR (ELD)

PGM-FI MAIN
RELAY 1

IGNITION
COIL RELAY

PGM-FI
SUBRELAY

MASS AIR FLOW (MAF)
SENSOR/INTAKE AIR
TEMPERATURE
(IAT) SENSOR

ENGINE COOLANT
TEMPERATURE (ECT) SENSOR 1

OUTPUT SHAFT (COUNTERSHAFT)
SPEED SENSOR (M/T)

ENGINE COOLANT TEMPERATURE
(ECT) SENSOR 2

MANIFOLD ABSOLUTE
PRESSURE (MAP) SENSOR

KNOCK SENSOR

INJECTORS

CRANKSHAFT POSITION
(CKP) SENSOR

ENGINE CONTROL MODULE (ECM)/
POWERTRAIN CONTROL
MODULE (PCM)

Replacement, page 11-222

Replacement, page 11-226

Replacement,

page 11-224

Replacement, page 11-225

Replacement, page 11-223

Replacement, page 11-225

Replacement, page 11-224

Replacement, page 11-223

Replacement,

page 11-219

Replacement,

page 11-222

Update, page 11-227
Substitution, page 11-7
Replacement, page 11-228

* : This illustration shows K20Z2 engine

08/08/21 14:15:36 61SNR030_110_0072

*02

*03

11-73

AIR FUEL RATIO (A/F) SENSOR
(SENSOR 1)

SECONDARY HEATED OXYGEN
SENSOR (SECONDARY HO2S)
(SENSOR 2)

DATA LINK CONNECTOR (DLC)

PGM-FI MAIN RELAY 2
(FUEL PUMP)

Replacement, page 11-221

Replacement, page 11-221

General Troubleshooting Information,

page 11-3

Circuit Troubleshooting, page 11-204

08/08/21 14:15:37 61SNR030_110_0073

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