Acura CSX. Instruction — page 160

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Idle speed should be:
K20Z2 engine:

M/T

700

50 rpm

A/T

800

50 rpm (in P or N)

K20Z3 engine:

M/T

750

50 rpm

Idle speed should be:
K20Z2 engine:

M/T

780

50 rpm

A/T

800

50 rpm (in P or N)

K20Z3 engine:

M/T

750

50 rpm

Procedure

11-310

11-310

Idle Control System

ECM/PCM Idle Learn Procedure

4. Start the engine. Hold the engine speed at

3,000 rpm without load (A/T in P or N, M/T in
neutral) until the radiator fan comes on, then let it
idle.

5. Check the idle speed without load conditions:

headlights, blower fan, radiator fan, and air
conditioner off.

6. Let the engine idle for 1 minute with high electric

load (A/C switch on, temperature set to max cool,
blower fan on high, and headlights on high beam).

NOTE: If the idle speed is not within specification,
do the ECM/PCM idle learn procedure (see page
11-310). If the idle speed is still not within
specification, go to the symptom troubleshooting.

7. Reconnect the EVAP canister purge valve

connector.

The idle learn procedure must be done so the ECM/PCM
can learn the engine idle characteristics.

Do the idle learn procedure whenever you do any of
these actions:

• Replace the ECM/PCM.
• Reset the ECM/PCM.
• Update the ECM/PCM.
• Replace or clean the throttle body.
• Disassemble the engine or the transmission.

NOTE: Erasing DTCs with the HDS does not require you
to do the idle learn procedure.

1. Make sure all electrical items (A/C, audio, lights, etc.)

are off.

2. Reset the ECM/PCM with the HDS.

3. Turn the ignition switch to ON (II), and wait

2 seconds.

4. Start the engine. Hold the engine speed at

3,000 rpm without load (A/T in P or N, M/T in
neutral) until the radiator fan comes on, or until the
engine coolant temperature reaches 90 °C (194 °F).

5. Let the engine idle for about 5 minutes with the

throttle fully closed.

NOTE: If the radiator fan comes on, do not include
its running time in the 5 minutes.

08/08/21 14:29:38 61SNR030_110_0310

SNR9AA7A20336124601BAAT10

±
±

±

±
±

±

Idle speed should be:
K20Z2 engine:

M/T

700

50 rpm

A/T

800

50 rpm (in P or N)

K20Z3 engine:

M/T

750

50 rpm

Idle speed should be:
K20Z2 engine:

M/T

780

50 rpm

A/T

800

50 rpm (in P or N)

K20Z3 engine:

M/T

750

50 rpm

Procedure

11-310

11-310

Idle Control System

ECM/PCM Idle Learn Procedure

4. Start the engine. Hold the engine speed at

3,000 rpm without load (A/T in P or N, M/T in
neutral) until the radiator fan comes on, then let it
idle.

5. Check the idle speed without load conditions:

headlights, blower fan, radiator fan, and air
conditioner off.

6. Let the engine idle for 1 minute with high electric

load (A/C switch on, temperature set to max cool,
blower fan on high, and headlights on high beam).

NOTE: If the idle speed is not within specification,
do the ECM/PCM idle learn procedure (see page
11-310). If the idle speed is still not within
specification, go to the symptom troubleshooting.

7. Reconnect the EVAP canister purge valve

connector.

The idle learn procedure must be done so the ECM/PCM
can learn the engine idle characteristics.

Do the idle learn procedure whenever you do any of
these actions:

• Replace the ECM/PCM.
• Reset the ECM/PCM.
• Update the ECM/PCM.
• Replace or clean the throttle body.
• Disassemble the engine or the transmission.

NOTE: Erasing DTCs with the HDS does not require you
to do the idle learn procedure.

1. Make sure all electrical items (A/C, audio, lights, etc.)

are off.

2. Reset the ECM/PCM with the HDS.

3. Turn the ignition switch to ON (II), and wait

2 seconds.

4. Start the engine. Hold the engine speed at

3,000 rpm without load (A/T in P or N, M/T in
neutral) until the radiator fan comes on, or until the
engine coolant temperature reaches 90 °C (194 °F).

5. Let the engine idle for about 5 minutes with the

throttle fully closed.

NOTE: If the radiator fan comes on, do not include
its running time in the 5 minutes.

08/08/21 14:29:38 61SNR030_110_0310

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11-311

Fuel Supply System

Component Location Index

FUEL FEED LINE

FUEL VAPOR LINE

FUEL RAIL

QUICK-CONNECT FITTING

QUICK-CONNECT FITTING

FUEL FILL CAP

FUEL TANK

FUEL PUMP

FUEL GAUGE SENDING UNIT

FUEL PRESSURE REGULATOR

FUEL FILTER

FUEL TANK UNIT

FUEL LINE/

FUEL LINE/

Precautions, page 11-328
Removal, page 11-329
Installation, page 11-331

Precautions, page 11-328
Removal, page 11-329
Installation, page 11-331

Draining, page 11-325
Replacement, page 11-339

Replacement, page 11-338

Test, page 11-340
Replacement, page 11-338

Replacement, page 11-337

Replacement, page 11-337

Removal and Installation,

page 11-334

08/08/21 14:29:41 61SNR030_110_0311

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11-312

Fuel Supply System

PGM-FI MAIN RELAY 1

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

PGM-FI MAIN
RELAY 2
(FUEL PUMP)

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

08/08/21 14:29:42 61SNR030_110_0312

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