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Honda Odyssey 2004. Manual - part 21

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4-4

Starting System

Circuit Diagram

IGNITION SWITCH

BAT

No.41 (120A)

No.42 (50A)

BATTERY

UNDER HOOD FUSE/RELAY BOX

BLU/WHT

BLK/WHT

YEL

BLK

STARTER

SOLENOID

BLK/YEL

WHT

BLK

(Closed : P and N position)

No.13 (7.5A)

BLU/ORN

G101

ST HOT in START (III)

•
•

DRIVER’S
UNDER DASH
FUSE/RELAY BOX

STARTER
CUT
RELAY

TRANSMISSION
RANGE SWITCH

PCM
PGM FI
MAIN RELAY

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Alternate Procedure

YES

4-5

Starter Circuit Troubleshooting

NOTE:

• Air temperature must be between 59° and 100°F (15°

and 38°C) during this procedure.

• After this test, or any subsequent repair, reset the

powertrain control module (PCM) to clear any
diagnostic trouble codes (DTCs) (see page 11-4).

• The battery must be in good condition and fully

charged.

• If you disconnect the battery, do the PCM idle learn

procedure (see page 11-202).

Recommended Procedure:

• Use a starter system tester.
• Connect and operate the equipment in accordance

with the manufacturer’s instructions.

1. Hook up the following equipment:

• Ammeter, 0

400A around both negative battery

cables

• Voltmeter, 0

20 V (accurate within 0.1 volt)

• Tachometer, 0

1,200 rpm

2. Remove the No. 1 (15A) fuse from the under-hood

fuse/relay box.

3. With the shift lever in P or N, turn the ignition

switch to start (III).

The starting system is OK.

Go to step 4.

4. Check the battery condition. Check electrical

connections at the battery, the negative battery
cable to the body, engine ground cables, and the
starter for looseness and corrosion. Then try
starting the engine again.

Repairing the loose connection fixed the

problem. The starting system is now OK.

If the starter will not crank the engine at all, go

to step 5. If it cranks the engine erratically or too
slowly, go to step 7. If it won’t disengage from the
torque converter ring gear when you release the
key, check for the following until you find the cause.

• Solenoid plunger and switch malfunction
• Dirty drive gear or damaged overrunning clutch.

5. Make sure the transmission is in P or N, then

disconnect the BLK/WHT wire (A) from the starter
solenoid (B). Connect a jumper wire from the
battery positive terminal to the solenoid terminal.

Go to step 6.

Remove the starter, repair or replace as

necessary.

(cont’d)

Did the star ter cr ank the engine nor mally?

Did the star ter cr ank the engine?

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YES

4-6

Starting System

Starter Circuit Troubleshooting
(cont’d)

Starter Solenoid Test

6. Check the following items in the order listed until

you find the open circuit.

• Check the BLK/WHT wire and connectors

between the driver’s under-dash fuse/relay box
and the ignition switch, and between the driver’s
under-dash fuse/relay box and the starter.

• Check the ignition switch (see page 22-145).
• Check the transmission range switch and

connector.

• Check the BLU/WHT wire between the starter cut

relay and transmission range switch.

• Substitute a known-good starter cut relay.

7. Check the cranking voltage and current draw.

Go to step 8.

Replace the starter, or remove and

disassemble it, and check for the following until
you find the cause.

• Open circuit in starter armature commutator

segments

• Starter armature dragging
• Shorted armature winding
• Excessive drag in engine

8. Check engine speed during cranking.

Go to step 9.

Remove and disassemble the starter, and

check for the following until you find the cause.

• Excessively worn starter brushes
• Open circuit in commutator brushes
• Dirty or damaged helical spline or drive gear
• Faulty drive gear clutch

9. Remove the starter and inspect its drive gear and

the torque converter ring gear for damage. Replace
any damaged parts.

1. Disconnect the starter cable, BLK/WHT wire and

starter motor wire.

2. Check the hold-in coil for continuity between the

S terminal and the armature housing (ground).
There should be continuity.

• If there is continuity, go to step 3.
• If there is no continuity, replace the solenoid.

3. Check the pull-in coil for continuity between the

S terminal and M terminal. There should be
continuity.

• If there is continuity, the solenoid is OK.
• If there is no continuity, replace the solenoid.

Is cr anking voltage gr eater than or equal to 8.5 V
and cur r ent dr aw less than or equal to 380A?

Is engine speed above 100 r pm?

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Specifications:

1.6 kW

80A or less (Electric current),
2,600 rpm or more (Motor-speed)

4-7

Starter Performance Test

12 V
BATTERY

BODY
(GROUND)

12 V
BATTERY

BODY
(GROUND)

12 V
BATTERY

BODY
(GROUND)

12 V
BATTERY

STARTER

1. Disconnect the wires from the S terminal and the

M terminal.

2. Make the connections as shown using as heavy a

wire as possible (preferably equivalent to the wire
used for the vehicle). To avoid damaging the starter,
never leave the battery connected for more than
10 seconds.

3. Connect the battery as shown. Be sure to

disconnect the starter motor wire from the solenoid.
If the starter pinion pops out, it is working properly.

4. Disconnect the battery from the M terminal. If the

pinion does not retract, the hold-in coil of the
solenoid is working properly.

5. Disconnect the battery also from the starter body. If

the pinion retracts immediately, it is working
properly.

6. Clamp the starter firmly in a vise.

7. Connect the starter to the battery as shown in the

diagram, and confirm that the motor starts and
keeps rotating.

8. If the electric current and motor speed meet the

specifications when the battery voltage is at 11.5 V,
the starter is working properly.

03/07/29 09:07:18 61S0X050_040_0007

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