Honda Odyssey 2004. Manual — part 76
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S0X4A000000000J1101PAAT00
Ref. No.
Tool Number
Description
Qty
11-2
Fuel and Emissions Systems
Special Tools
A973X-041-XXXXX
Vacuum Pump/Gauge, 0
30 in.Hg
1
07JAZ-001000B
Vacuum/Pressure Gauge, 0
4 in.Hg
1
07SAZ-001000A
Backprobe Set
2
07VAJ-0040100
Fuel Pressure Gauge Attachment
1
07XAA-001010A
Fuel Sender wrench
1
07406-004000A
Fuel Pressure Gauge
1
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S0X4A00K77100000000BBAT10
Intermittent Failures
Opens and Shorts
How to Use the HDS or a Scan Tool
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
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 wires at
all connectors related to the circuit that 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 PCM’s) this can sometimes mean something
works, but not the way it’s supposed to.
1. Start the engine, and check the MIL.
’01-04 Models
NOTE: If the ignition switch is turned ON (II), and
the engine is not started, the MIL will stay on for
15
20 seconds (see page 11-89).
2. If the MIL stays on, connect the HDS or an OBD II
scan tool to the Data Link Connector (DLC) (A)
located under the driver’s side of the dashboard.
3. Turn the ignition switch ON (II).
4. Check the Diagnostic Trouble Code (DTC) and note
it. Also check the freeze data. Refer to the DTC
Troubleshooting Index and begin the appropriate
troubleshooting procedure.
NOTE:
• Freeze data indicates the engine conditions when the
first malfunction, misfire or fuel trim malfunction was
detected.
• The HDS can read the DTC, freeze data, current data,
and other powertrain control module (PCM) data.
• For specific operations, refer to the user’s manual
that came with the HDS.
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
PCM and try to duplicate the DTC. If the problem is
intermittent and you can’t duplicate the DTC, do not
continue through the procedure. To do so will only
result in confusion and, possibly, a needlessly replaced
PCM.
(cont’d)
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How to Reset the PCM
How to End a Troubleshooting Session
(required after any troubleshooting)
How to Remove the PCM for Testing
11-4
Fuel and Emissions Systems
General Troubleshooting Information (cont’d)
B
A
12 N·m (1.2 kgf·m, 8.7 lbf·ft)
A
D
C
E
F
B
You can reset the PCM in either of 2 ways:
• Use the OBD II scan tool or HDS to clear the PCM’s
memory.
See the OBD II scan tool or HDS user’s manuals for
specific instructions.
• Turn the ignition switch OFF, and remove the No. 13
CLOCK BACKUP fuse (7.5A) (A) from the passenger’s
under-dash fuse/relay box (B) for 10 seconds.
1. Reset the PCM as described above.
2. Turn the ignition switch OFF.
3. Disconnect the OBD II scan tool or HDS from the
DLC.
4. Do the idle learn procedure (see page 11-202).
NOTE: The PCM is part of the immobilizer system. If
you replace the PCM, it will have a different immobilizer
code. In order for the engine to start, you must rewrite
the immobilizer code with the HDS.
If the inspection for a trouble code requires voltage or
resistance checks at the PCM connectors, remove the
PCM and test it:
1. Pull back the carpet and remove the passenger’s
and driver’s side center lower console covers
(A and B) to expose the PCM (C).
2. Remove the PCM cover (D) from the passenger’s
side under-dash to access the PCM mounting nut
(E).
3. Remove the PCM mounting bolt (F) and remove the
PCM.
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How to Troubleshoot Circuits at the PCM
How to Substitute the PCM for Testing
Purposes
Special Tools Required
11-5
A
B
07SAZ-001000A (2)
C
A
B
A
B
• Digital Multimeter KS-AHM-32-003 (1) or a
commercially available digital multimeter
• Backprobe Set 07SAZ-001000A (2)
1. Connect the backprobe adapters (A) to the stacking
patch cords (B), and connect the cords to a digital
multimeter (C).
2. Using the wire insulation as a guide for the
contoured tip of the backprobe adapter, gently slide
the tip into the connector from the wire side until it
touches the end of the wire terminal.
3.
Do not puncture the insulation on a wire.
Punctures can cause poor or intermittent
electrical connections.
Use this procedure if you need a known-good PCM to
test a vehicle. It allows you to swap a PCM from a
‘‘donor’’ vehicle without having to program it to the test
vehicle’s ignition key.
1. Cut a temporary ignition key for the test vehicle
with a non-immobilizer key blank.
2. Remove the PCM from the test vehicle.
3. Write the test vehicle’s VIN on the PCM you just
removed to avoid confusing it with the donor
vehicle’s PCM.
4. Remove the known-good PCM from the donor
vehicle, and install it in the test vehicle.
5. Tape the donor vehicle’s ignition key head-to-head
to the test vehicle’s temporary key (A). The PCM
will recognize the code from the donor vehicle’s
key (B) and allow you to start the engine with the
temporary key.
6. After completing your tests, reinstall both PCMs,
and destroy the temporary key.
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If you cannot get to the wire side of the connector
or the wire side is sealed (A), disconnect the
connector and use the backprobe set to probe
the terminals (B) from the terminal side. Do not
force the probe into the connector.
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