Honda Odyssey 2004. Manual — part 118
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11-170
PGM-FI System
MIL Circuit Troubleshooting (cont’d)
PCM CONNECTOR E (31P)
MIL (GRN/ORN)
JUMPER WIRE
5. Turn the ignition switch ON (II), and watch the
Malfunction Indicator Lamp (MIL).
If the MIL always come 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 (E16) and the data link connector (DLC)
connector.
• An intermittent short in the wire between the
PCM (E4) 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 E4.
• An intermittent open in the GRN/ORN wire
between the PCM (E4) and the gauge assembly.
• An intermittent short in the wire between the
PCM (A31) and the manifold absolute pressure
(MAP) sensor.
• An intermittent short in the wire between the
PCM (A30) and the throttle position (TP) sensor or
the Exhaust Gas Recirculation (EGR) valve
position sensor.
• An intermittent short in the wire between the
PCM (E6) and the fuel tank pressure (FTP) sensor.
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 E4 and 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 (E4) and the gauge assembly. Also check for a
blown MIL bulb.
Wire side of female terminals
Does the MIL come on and stay on f or mor e than
20 seconds af ter tur ning the ignition switch ON
( II)?
Is the low oil pr essur e indicator on?
Does the engine star t?
Is the MIL on?
03/07/29 09:22:55 61S0X050_110_0170
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11-171
PCM CONNECTORS
VCC2 (YEL/BLU)
VCC1
(YEL/
RED)
VCC3 (YEL/BLU)
A (31P)
E (31P)
PCM CONNECTOR A (31P)
IGP2 (YEL/BLK)
IGP1 (YEL/BLK)
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 A (31P) and E (31P).
15. Check for continuity between body ground and
PCM connector terminals A30, A31, and E6
individually.
Go to step 16.
Go to step 17.
16. Disconnect the 3P connector from each of these
sensors, one at a time, and check for continuity
between body ground and PCM connector
terminals A30, A31, and E6 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 (A31) and the MAP sensor, the PCM
(A30) and the TP sensor, or the EGR valve position
sensor, the PCM (E6), and the 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 A2 and A3 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 A2 and A3.
• 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 connectors A (31P) and E (31P).
(cont’d)
Wire side of female terminals
Wire side of female terminals
Is the f use OK ?
Is the f use OK ?
Is ther e continuity?
Is ther e continuity?
Is ther e batter y voltage?
03/07/29 09:22:56 61S0X050_110_0171
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11-172
PGM-FI System
MIL Circuit Troubleshooting (cont’d)
PCM CONNECTOR A (31P)
PG2 (BLK)
PG1 (BLK)
LG2
(BRN/BLK)
LG1
(BRN/BLK)
SCS (BRN)
PCM CONNECTOR E (31P)
SCS (BRN)
PCM CONNECTOR E (31P)
21. Turn the ignition switch ON (II), and measure
voltage between body ground and PCM connector
terminals A4, A5, A25, and A26 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) that had more
than 1.0 V between G101 and the PCM (A4, A5, A25,
and A26).
22. Turn the ignition switch OFF, then turn it back ON
(II), and measure voltage between PCM connector
terminal E16 and body ground.
Go to step 26.
Go to step 23.
23. Turn the ignition switch OFF.
24. Disconnect PCM connector E (31P).
25. Check for continuity between PCM connector
terminal E16 and body ground.
Repair short in the wire between the data link
connector (DLC) and the PCM (E16).
Substitute a known-good PCM and recheck
(see page 11-5). If the symptom/indication goes
away, replace the original PCM.
26. Turn the ignition switch OFF.
27. Disconnect PCM connector E (31P).
28. Turn the ignition switch ON (II).
Repair short in the wire between the gauge
assembly and the PCM (E4).
Substitute a known-good PCM and recheck
(see page 11-5). If the symptom/indication goes
away, replace the original PCM.
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Is ther e less than 1.0 V ?
Is ther e about 5 V ( or batter y voltage)?
Is ther e continuity?
Does the MIL stay on?
03/07/29 09:22:57 61S0X050_110_0172
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S0X4AZ6A20326919461FAAT00
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’99-00, ’02-04 Models
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11-173
DLC Circuit Troubleshooting
DATA LINK CONNECTOR (DLC)
B
(WHT/GRN)
DATA LINK CONNECTOR (DLC)
GND (BLK)
B (WHT/GRN)
DATA LINK CONNECTOR (DLC)
GND (BRN/YEL)
B (WHT/GRN)
DATA LINK CONNECTOR (DLC)
K-LINE
(GRY)
GND
(BRN/YEL)
NOTE:
• If the PCM does not communicate with the HDS, do
this troubleshooting.
• Check that the MIL circuit is normal, then do this
troubleshooting.
1. Turn the ignition switch ON (II).
2. Measure voltage between data link connector (DLC)
terminal No. 16 and body ground.
Go to step 3.
Repair open in the wire between DLC terminal
No. 16 and the ACGS (15A) fuse in the under-hood
fuse/relay box.
3. Measure voltage between DLC terminal No. 4 and
No. 16.
Go to step 4.
Repair open in the wire between DLC terminal
No. 4 and G501.
4. Measure voltage between DLC terminals No. 5 and
No. 16.
Go to step 5.
Repair open in the wire between DLC terminal
No. 5 and G101.
5. Measure voltage between DLC terminals No. 5 and
No. 7.
Go to step 10.
Go to step 6.
6. Turn the ignition switch off.
(cont’d)
Terminal side of female terminals
Terminal side of female terminals
Terminal side of female terminals
Terminal side of female terminals
Is ther e batter y voltage?
Is ther e batter y voltage?
Is ther e batter y voltage?
Is ther e 8.5 V or mor e?
03/07/29 09:22:57 61S0X050_110_0173
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