Honda Odyssey 2004. Manual — part 117
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S0X4AZ6A20326939902FAAT00
’99-00, ’02-04 Models
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NO
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11-166
PGM-FI System
MIL Circuit Troubleshooting
NOTE: Information marked with an asterisk ( ) applies
to ’02-04 models.
1. Connect the HDS (see page 11-3).
2. Turn the ignition switch ON (II), and read the HDS.
Go to step 3.
Go to step 4.
3. Check the DTCs with the HDS.
Go to the DTC Troubleshooting Index.
Go to step 4.
4. Turn the ignition switch OFF.
5. Turn the ignition switch ON (II), and watch the
malfunction indicator lamp (MIL).
If the MIL always comes on and stays on, go
to step 22. But if the MIL sometimes works
normally, first check for these problems:
• An intermittent short in the wire between the
PCM (A10) and the Data Link Connector (DLC)
connector.
• An intermittent short in the wire between the
PCM (A18) and the gauge assembly.
If the MIL is always off, go to step 6. But if the
MIL sometimes works normally, first check for
these problems:
• A loose No. 9 BACK UP LIGHT, INSTRUMENT
LIGHT (7.5A) fuse in the driver’s under-dash fuse/
relay box.
• A loose ACG S (15A) fuse in the under-hood fuse/
relay box.
• A loose No. 1 FUEL PUMP (15A) fuse in the
driver’s under-dash fuse/relay box.
• A poor connection at PCM terminal A18.
• An intermittent open in the GRN/ORN wire
between the PCM (A18) and the gauge assembly.
• An intermittent short in the wire between the
PCM (C19) and the manifold absolute pressure
(MAP) sensor.
• An intermittent short in the wire between the
PCM (C28) and the throttle position (TP) sensor,
Exhaust Gas Recirculation (EGR) valve position
sensor, or the fuel tank pressure (FTP) sensor.
Does the HDS communicate with the PCM?
Ar e any DT Cs indicated?
Does the MIL come on and stay on f or mor e than
20 seconds af ter tur ning the ignition switch ON
( II)?
03/07/29 09:22:53 61S0X050_110_0166
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11-167
PCM CONNECTOR A (32P)
JUMPER WIRE
MIL (GRN/ORN)
PCM CONNECTOR C (31P)
VCC2
(YEL/BLU)
VCC1
(YEL/RED)
6. Turn the ignition switch OFF and then ON (II) again.
Go to step 7.
Check for these problems:
• A blown No. 9 BACK UP LIGHT, INSTRUMENT
LIGHT (7.5A) fuse in the driver’s under-dash
fuse/relay box.
• A short or open in the wire between No. 9 BACK
UP LIGHT, INSTRUMENT LIGHT (7.5A) fuse and
the gauge assembly.
7. Try to start the engine.
Go to step 8.
Go to step 11.
8. Turn the ignition switch OFF .
9. Connect PCM connector terminal A18 to body
ground with a jumper wire.
10. Turn the ignition switch ON (II).
Substitute a known-good PCM and recheck
(see page 11-5). If the symptom/indication goes
away, replace the original PCM.
Check for an open in the wires between the
PCM (A18) and the gauge assembly. Also check for
a blown MIL bulb.
11. Turn the ignition switch OFF.
12. Inspect the ACGS (15A) fuse in the under-hood
fuse/relay box.
Go to step 13.
Check for these problems:
• A short in the wire between the ACGS (15A) fuse
and the PGM-FI main relay.
• A short in the wire between the PGM-FI main
relay and the PCM, injectors, or IAC valve.
13. Inspect the No. 1 FUEL PUMP (15A) fuse in the
under-dash fuse/relay box.
Go to step 14.
Check for these problems:
• A short in the wire between the No. 1 FUEL
PUMP (15A) fuse and the PGM-FI main relay.
• A short in the wire between the PGM-FI main
relay and the fuel pump.
• A faulty PGM-FI main relay or a faulty fuel pump.
14. Disconnect PCM connector C (31P).
15. Check for continuity between body ground and
PCM connector terminals C19 and C28 individually.
Go to step 16.
Go to step 17.
(cont’d)
Wire side of female terminals
Wire side of female terminals
Is the low oil pr essur e indicator on?
Does the engine star t?
Is the MIL on?
Is the f use OK ?
Is the f use OK ?
Is ther e continuity?
03/07/29 09:22:54 61S0X050_110_0167
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*01
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11-168
PGM-FI System
MIL Circuit Troubleshooting (cont’d)
PCM CONNECTOR B (25P)
IGP2
(YEL/BLK)
IGP1
(YEL/BLK)
PCM CONNECTOR B (25P)
LG1
(BRN/BLK)
(BRN/YEL)*
LG2
(BRN/BLK)
(BRN/YEL)*
PG2
(BLK)
PG1 (BLK)
SCS (BRN)
PCM CONNECTOR A (32P)
16. Disconnect the 3P connector from each of these
sensors, one at a time, and check for continuity
between body ground and PCM connector terminal
C19 and C28 individually.
• Manifold Absolute Pressure (MAP) sensor
• Exhaust Gas Recirculation (EGR) valve position
sensor
• Throttle Position (TP) sensor
• Fuel Tank Pressure (FTP) sensor
Repair short to body ground in the wire
between PCM (C19) and the MAP sensor, or PCM
(C28) and the TP sensor, EGR valve position sensor
or FTP sensor.
Replace the sensor that made continuity to
body ground go away when disconnected.
17. Disconnect the injectors and IAC valve connectors.
18. Turn the ignition switch ON (II).
19. Measure voltage between body ground and PCM
connector terminals B1 and B9 individually.
Go to step 20.
Check for these problems:
• An open in the wire(s) between the PGM-FI main
relay and PCM connector terminals B1 and B9.
• Poor connections at the PGM-FI main relay.
• A faulty PGM-FI main relay (see page 11-209).
20. Reconnect the connectors to the sensors, then
reconnect PCM connector C (31P).
21. Turn the ignition switch ON (II), and measure
voltage between body ground and PCM connector
terminals B2, B10, B20, and B22 individually.
Substitute a known-good PCM and recheck
(see page 11-5). If the symptom/indication goes
away, replace the original PCM.
Repair the open in the wire(s) between G101
and the PCM (B2, B10, B20, B22) that had more
than 1.0 V.
22. Turn the ignition switch OFF, then turn it back ON
(II), and measure voltage between PCM connector
terminal A10 and body ground.
Go to step 26.
Go to step 23.
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Is ther e continuity?
Is ther e batter y voltage?
Is ther e less than 1.0 V ?
Is ther e about 5 V ( or batter y voltage)?
03/07/29 09:22:54 61S0X050_110_0168
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02
S0X4AZ1A20326939902FAAT00
YES
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YES
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’01 Model
11-169
11-169
SCS (BRN)
PCM CONNECTOR A (32P)
23. Turn the ignition switch OFF.
24. Disconnect PCM connector A (32P).
25. Check for continuity between PCM connector
terminal A10 and body ground.
Repair short in the wire between the data link
connector (DLC) and the ECM/PCM (A10).
Substitute a known-good ECM/PCM and
recheck (see page 11-5). If the symptom/indication
goes away, replace the original ECM/PCM.
26. Turn the ignition switch OFF.
27. Disconnect PCM connector A (32P).
28. Turn the ignition switch ON (II).
Repair short in the wire between the gauge
assembly and the PCM (A18).
Substitute a known-good PCM and recheck
(see page 11-5). If the symptom/indication goes
away, replace the original PCM.
1. Connect the HDS (see page 11-4).
2. Turn the ignition switch ON (II), and read the HDS.
Go to step 3.
Go to step 4.
3. Check the DTCs with the HDS.
Go to the DTC Troubleshooting Index.
Go to step 4.
4. Turn the ignition switch OFF.
(cont’d)
Wire side of female terminals
Is ther e continuity?
Does the MIL stay on?
Does the HDS communicate with the PCM?
Ar e any DT Cs indicated?
03/07/29 09:22:55 61S0X050_110_0169
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