Honda Odyssey 2004. Manual — part 71
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04
YES
NO
YES
NO
YES
NO
Coolant Temperature Gauge Needle Goes
Past the Hot Mark - 2002-2004 models
10-8
Cooling System
Coolant Temperature Gauge Test (cont’d)
PCM CONNECTOR E (31P)
MTRTW
(YEL/GRN)
(YEL/GRN)
GAUGE ASSEMBLY CONNECTOR C (16P)
5. Check for continuity between PCM connector
terminal E14 and gauge assembly connector
terminal C2.
Repair a short in the wire between PCM
connector E14 terminal and gauge connector
terminal C2.
Replace the fuel and temperature gauge
assembly.
1. Turn the ignition switch OFF, and disconnect the
negative cable from the battery. Then disconnect
PCM connector A (32P).
2. Connect the negative cable to the battery. Turn the
ignition switch ON (II) and watch the coolant
temperature gauge.
Go to step 3.
Substitute a known-good PCM and recheck
(see page 11-5). If the symptom/indication goes
away, replace the original PCM (see page 11-4).
3. Turn the ignition switch OFF, then turn it ON (II)
again, and watch the coolant temperature gauge.
Replace the fuel and temperature gauge
assembly.
The temperature gauge needle went past the
Hot mark after about 30 seconds or more. Go to
step 4.
4. Turn the ignition switch OFF, and disconnect the
gauge assembly connector C (16P).
Wire side of female terminals
Is ther e continuity?
Does the temper atur e gauge needle move at all?
( you may have to watch it f or about 30 seconds.)
Does the temper atur e gauge needle immediately
go past the Hot mar k?
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YES
NO
1999-2000 models
10-9
10-9
Sending Unit Test
PCM CONNECTOR A (32P)
ECTOUT
(YEL/GRN)
(YEL/GRN)
GAUGE ASSEMBLY CONNECTOR C (16P)
A
C
B
5. Check for continuity between PCM connector
terminal A31 and gauge assembly connector
terminal C2.
Repair a short in the wire between PCM
connector A31 and gauge connector terminal C2.
Replace the fuel and temperature gauge
assembly.
1. Disconnect the YEL/GRN wire (A) from the coolant
temperature gauge sending unit (B).
2. Using an ohmmeter, measure the change in
resistance between the positive terminal (C) and
the engine (ground) with the engine cold and with
the engine at operating temperature.
Temperature
133°F (56°C)
185°F (85°C)
212°F (100°C)
Resistance (
)
137
46
30
3. If the obtained readings are substantially different
from the specifications above, replace the sending
unit.
Wire side of female terminals
Is ther e continuity?
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10-10
10-10
Cooling System
Radiator Cap Test
Radiator Test
A
B
A
1. Remove the radiator cap (A), wet its seal with
engine coolant, then install it on the pressure tester
(B) (commercially available).
2. Apply a pressure of 93
123 kPa (0.95
1.25
kgf/cm , 14
18 psi).
3. Check for a drop in pressure.
4. If the pressure drops, replace the cap.
1. Wait until the engine is cool, then carefully remove
the radiator cap and fill the radiator with engine
coolant to the top of the filler neck.
2. Attach the pressure tester (A) (commercially
available) to the radiator and apply a pressure of
93
123 kPa (0.95
1.25 kgf/cm , 14
18 psi).
3. Inspect for engine coolant leaks and a drop in
pressure.
4. Remove the tester and reinstall the radiator cap.
2
2
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Standard Thermostat
Lift height:
above 10.0 mm (0.39 in.)
Starts opening:
’99-01 models:
163
171°F (73
77°C)
’02-04 models:
169
176°F (76
80°C)
Fully open:
194°F (90°C)
10-11
10-11
Fan Motor Test
Thermostat Test
A
B
B
A
1. Disconnect the 2P connectors from the radiator fan
motor (A) and condenser fan motor (B).
2. Test the motor by connecting battery power to the
B terminal and, the ground to the A terminal.
3. If the motor fails to run or does not run smoothly,
replace it.
Replace the thermostat if it is open at room
temperature.
To test a closed thermostat:
1. Suspend the thermostat (A) in a container of water.
Do not let the thermometer (B) touch the bottom of
the hot container.
2. Heat the water and check the temperature with a
thermometer. Check the temperature at which the
thermostat first opens, and at which it is fully open.
3. Measure the lift height of the thermostat when it is
fully open.
Terminal side of male terminals
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