Acura CSX. Manual - part 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