Acura CSX. Instruction — page 82

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SNR9A000000000J1101PAAT00

Ref. No.

Tool Number

Description

Qty

11-2

Fuel and Emissions Systems

Special Tools

07AAA-SNAA100

Fuel Pump Module Locknut Wrench

1

07AAJ-S6MA150

Fuel Pressure Gauge Attachment Set

1

07JAZ-001000B

Vacuum/Pressure Gauge, 0

4 in.Hg

1

07NAJ-P07010A

Pressure Gauge Adapter

1

07ZAJ-S5AA200

Oil Pressure Hose

1

-1

07406-0020201

A/T Pressure Hose

1

-2

07406-0070301

A/T Low Pressure Gauge W/Panel

1

-3

07MAJ-PY4011A

A/T Pressure Hose, 2,210 mm

1

-4

07MAJ-PY40120

A/T Pressure Adapter

1

07406-004000B

Fuel Pressure Gauge

1

-1,

-2,

-3,

-4

08/08/21 14:12:31 61SNR030_110_0002

05

02

SNR9AA7K72100000000BBAT00

Intermittent Failures

Service Information

Opens and Shorts

How to Use the HDS (Honda Diagnostic
System)

If the MIL (malfunction indicator lamp) has come on

If the MIL did not stay on

If you can’t duplicate the DTC

11-3

General Troubleshooting Information

A

A

The term intermittent failure means a system may have
had a failure, but it checks OK now. If the malfunction
indicator lamp (MIL) on the dash does not come on,
check for poor connections or loose terminals at all
connectors related to the circuit that you are
troubleshooting. If the MIL was on but then went out,
the original problem may have been intermittent.

Periodically, new ECM/PCM software or new service
procedures may become available. Always check
online for the latest software or service information
related to the DTCs or symptoms you are
troubleshooting.

Open and short are common electrical terms. An open
is a break in a wire or at a connection. A short is an
accidental connection of a wire to ground or to another
wire. In simple electronics, this usually means
something won’t work at all. With complex electronics
(such as ECMs or PCMs) this can sometimes mean
something works, but not the way it’s supposed to.

1. Start the engine, and check the MIL (A).

NOTE: If the ignition switch is turned to ON (II), and
the engine is not started, the MIL stays on for
15

20 seconds (see page 11-69).

2. If the MIL stays on, connect the HDS to the data link

connector (DLC) (A) located under the driver’s side
of the dashboard.

3. Turn the ignition switch to ON (II).

4. Make sure the HDS communicates with the ECM/

PCM and other vehicle systems. If it doesn’t, go to
the DLC circuit troubleshooting (see page 11-204).

5. Check the diagnostic trouble code (DTC) and note it.

Also check the freeze data and/or on-board
snapshot data, and download any data found. Then
refer to the indicated DTC’s troubleshooting, and
begin the appropriate troubleshooting procedure.

NOTE:

• Freeze data indicates the engine conditions when

the first malfunction, misfire, or fuel trim
malfunction that activated the MIL was detected.

• The HDS can read the DTC, freeze data, on-board

snapshot, current data, and other engine control
module (ECM) or powertrain control module
(PCM) data.

• For specific operations, refer to the user’s

manual that came with the HDS.

6. If no DTCs are found, go to MIL troubleshooting

(see page 11-203).

If the MIL did not stay on but there is a driveability
problem, do the symptom troubleshooting.

Some of the troubleshooting requires you to reset the
ECM/PCM and try to duplicate the DTC. If the problem is
intermittent and you can’t duplicate the code, do not
continue through the procedure. To do so will only
result in confusion and possibly, a needlessly replaced
ECM/PCM.

08/08/21 14:12:32 61SNR030_110_0003

03

HDS Clear Command

Scan Tool Clear Command

DTC Clear

ECM/PCM Reset

CKP Pattern Clear/CKP Pattern Learn

Clear/Learn Procedure (with the HDS)

11-4

Fuel and Emissions Systems

A

The ECM/PCM stores various specific data to correct the
system even if there is no electrical power, such as
when the battery negative terminal or the No. 19
FI MAIN (15 A) fuse is disconnected. Stored data based
on failed parts should be cleared by using the CLEAR
COMMAND of the HDS, if parts are replaced.

The HDS has three kinds of clear commands to meet
this purpose. They are DTC clear, ECM/PCM reset, and
CKP pattern clear. DTC clear command erases all stored
DTC codes, freeze data, on-board snapshot, and
readiness codes. This must be done with the HDS after
reproducing the DTC during troubleshooting.
The ECM/PCM reset command erases all stored DTC
codes, freeze data, on-board snapshot, readiness codes,
and all specific data to correct the system except CKP
pattern. If the CKP pattern data in the ECM/PCM was
cleared, you must do the CKP pattern learn procedure.
The CKP pattern clear command erases only CKP
pattern data. This command is for repair of a misfire or
the CKP sensor.

If you are using a generic scan tool to clear commands,
be aware that there is only one setting for clearing the
ECM/PCM, and it clears all commands at the same time
(CKP pattern learn, idle learn, readiness codes, freeze
data, on-board snapshot, and DTCs). After you clear all
commands, you then need to do these procedures, in
this order: ECM/PCM idle learn procedure (see page
11-310); CKP pattern learn procedure;
Test-drive to set readiness codes to complete (see page
11-69).

1. Clear the DTC with the HDS while the engine is

stopped.

2. Turn the ignition switch to LOCK (0).

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

30 seconds.

4. Turn the ignition switch to LOCK (0), and

disconnect the HDS from the DLC.

1. Reset the ECM/PCM with the HDS while the engine

is stopped.

2. Turn the ignition switch to LOCK (0).

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

30 seconds.

4. Turn the ignition switch to LOCK (0), and

disconnect the HDS from the DLC.

5. Do the ECM/PCM idle learn procedure (see page

11-310).

1. Connect the HDS to the data link connector (DLC)

(A) located under the driver’s side of the dashboard.

2. Turn the ignition switch to ON (II).

3. Make sure the HDS communicates with the ECM/

PCM and other vehicle systems. If it doesn’t, go to
the DLC circuit troubleshooting (see page 11-204).

4. Select CRANK PATTERN in the ADJUSTMENT

MENU with the HDS.

5. Select CRANK PATTERN LEARNING with the HDS,

and follow the screen prompts.

08/08/21 14:12:32 61SNR030_110_0004

Learn Procedure (without the HDS)

How to End a Troubleshooting Session
(required after any troubleshooting)

11-5

1. 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.

2. Test-drive the vehicle on a level road: Decelerate

(with the throttle fully closed) from an engine speed
of 2,500 rpm down to 1,000 rpm with the A/T in
S in 1st or 2nd, or M/T in 1st.

3. Test-drive the vehicle on a level road: Decelerate

(with the throttle fully closed) from an engine speed
of 5,000 rpm down to 3,000 rpm with the A/T in
S in 1st or 2nd, or M/T in 1st.

4. Repeat step 2 and 3 several times.

5. Turn the ignition switch to LOCK (0).

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

30 seconds.

1. Reset the ECM/PCM with the HDS.

2. Do the ECM/PCM idle learn procedure (see page

11-310).

3. Turn the ignition switch to LOCK (0).

4. Disconnect the HDS from the DLC.

NOTE: The ECM/PCM is part of the immobilizer
system. If you replace the ECM/PCM, it will have a
different immobilizer code. For the engine to start,
you must rewrite the immobilizer code with the
HDS.

08/08/21 14:12:33 61SNR030_110_0005

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