alternator ACURA CSX 2006 Service User Guide



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4-29
Alternator Control Circuit Troubleshooting
BATTERY
ALTERNATOR
4P CONNECTOR C (WHT/GRN) ALT C
(WHT/GRN)
ECM/PCM CONNECTOR B (44P)
1. Connect the Honda Diagnostic System (HDS) to the
data link connector (DLC) (see step 2 on page 11-3).
2. Turn the ignition switch to ON (II).
3. Make sure the HDS communicates with the vehicle and the engine control module (ECM)/powertrain
control module (PCM). If it does not communicate,
troubleshoot the DLC circuit (see page 11- 204).
4. Check for DTCs (see page 11-3). If a DTC is present, diagnose and repair the cause before continuing
with this test.
5. Disconnect the alternator 4P connector.
6. Start the engine, and turn on the headlights to high beam.
7. Measure the voltage between alternator 4P connector terminal No. 2 and the positive terminal
of the battery.
Go to step 11.
Go to step 8.
8. Jump the SCS line with the HDS, then turn the ignition switch to LOCK (0).
NOTE: This step must be done to protect the ECM/
PCM from damage.
9. Disconnect ECM/PCM connector B (44P). 10. Check for continuity between ECM/PCM connector
terminal B41 and body ground.
Repair short to ground in the wire between
alternator 4P connector terminal No. 2 and ECM/
PCM connector terminal B41.
Update the ECM/PCM if it does not have the
latest software (see page 11-227), or substitute a
known-good ECM/PCM (see page 11-7), then
recheck. If the symptom/indication goes away with
a known-good ECM/PCM, replace the original ECM/
PCM (see page 11-228).
11. Jump the SCS line with the HDS, then turn the ignition switch to LOCK (0).
NOTE: This step must be done to protect the ECM/
PCMfromdamage.
12. Disconnect ECM/PCM connector B (44P).
(cont’d)
Wire side of
female terminals Terminal side of female terminals
Is t her e 1 V or l ess?
Is there continuity?
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4-304-30 Charging System
Alternator Control Circuit
Troubleshooting (cont’d)
Drive Belt Inspection
C (WHT/GRN)
ALTERNATOR
4P CONNECTOR ALT C
(WHT/GRN)
ECM/PCM CONNECTOR B (44P)
A
B
13. Check for continuity between ECM/PCM connector terminal B41 and alternator 4P connector terminal
No. 2.
Replace the alternator (see page 4-34), or
repair the alternator (see page 4-38).
Repair open in the wire between alternator 4P
connector terminal No. 2 and ECM/PCM connector
terminal B41. 1. Inspect the belt for cracks or damage. If the belt is
cracked or damaged, replace it (see page 4-31).
2. Check the position of the auto-tensioner indicator (A) is within the standard range (B) as shown. If it is
out of the standard range, replace the drive belt
(see page 4-31).
Wire side of
female terminals
Terminal side of female terminals
Is there continuity?
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Removal
4-344-34 Charging System
Idler Pulley Replacement
Alternator Removal and Installation
8x1.25mm
22 N·m
(2.2 kgf·m, 16 lbf·ft)
AB
C
A
C
C C
1. Remove the drive belt (see page 4-31).
2. Remove the idler pulley.
3. Install the idler pulley in the reverse order of
removal. 1. Do the battery terminal disconnection procedure
(see page 22-68).
2. Remove the drive belt (see page 4-31).
3. Remove the front grille cover (see page 20-163).
4. Disconnect the fan motor connectors (A) and the hood switch connector (B), then remove the
harnessclamps(C).
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4-35
D
C
A
C B
B
C
A AB
C
5. Disconnect the reservoir hose (A), and remove the radiator cap base mounting bolts (B), the radiator
upper brackets (C) and the bolts (D).
6. Remove the A/C condenser bracket mounting bolts (A) and the bulkhead mounting bolts (B), then
remove the bulkhead (C). 7. Remove the three bolts securing the alternator.
8. Disconnect the alternator connector (A), and the
positive alternator cable (B) and remove the
harness clamp (C), then remove the alternator.
(cont’d)
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Installation
4-36Charging System
Alternator Removal and Installation (cont’d)
A
B
C 6x1.0mm
8 N·m (0.8 kgf·m,
6lbf·ft)
8x1.25mm
22 N·m
(2.2 kgf·m, 16 lbf·ft) 8x1.25mm
22 N·m
(2.2 kgf·m, 16 lbf·ft) A
B
6x1.0mm
10 N·m (1.0 kgf·m, 7.2 lbf·ft)
C
6x1.0mm
10 N·m (1.0 kgf·m, 7.2 lbf·ft) A
D
A
C
6x1.0mm
10 N·m (1.0 kgf·m, 7.2 lbf·ft)
B
6x1.0mm
10 N·m (1.0 kgf·m, 7.2 lbf·ft)
1. Install the alternator, then connect the alternator
connector (A) and the positive alternator cable (B)
and install the harness clamp (C). Make sure the
crimped side of the ring terminal faces away from
the alternator when you connect it.
2. Tighten the three bolts securing the alternator. 3. Install the bulkhead (A), then install the bulkhead
mounting bolts (B) and the A/C condenser bracket
mounting bolts (C).
4. Apply body paint to the bulkhead mounting bolts.
5. Install the radiator upper brackets (A), the radiator cap base mounting bolts (B), and the bolts (C), and
connect the reservoir hose (D).
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Exploded View
4-38Charging System
Alternator Overhaul
ROTOR
FRONT BEARING
RETAINERFRONT BEARING
DRIVE-END
HOUSING
PULLEYPULLEY
LOCKNUT
TERMINAL
INSULATOR BRUSH HOLDER
ASSEMBLY REAR HOUSING
ASSEMBLY
END COVER WASHER
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Special Tools Required
4-39
B
A
 Driver 07749-0010000
 Attachment, 42 x 47 mm 07746-0010300
NOTE: Refer to the Exploded View as needed during
this procedure.1. Test the alternator and regulator before you remove them (see page 4-28).
2. Remove the alternator (see page 4-34).
3. If the front bearing needs replacing, remove the pulley locknut with a 10 mm wrench (A) and a
22 mm wrench (B). If necessary, use an impact
wrench.
4. Remove the harness stay and the three flange nuts from the alternator. 5. Remove the end cover.
6. Remove the brush holder assembly.
(cont’d)
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4-40Charging System
Alternator Overhaul (cont’d)
B
A
7. Remove the four through bolts, then remove the
rear housing assembly (A), and washer (B).
8. If you are not replacing the front bearing, go to step 13. Remove the rotor from the drive-end
housing. 9. Inspect the rotor shaft for scoring, and inspect the
bearing journal surface in the drive-end housing for
seizure marks.
 If the rotor is damaged, replace the rotor assembly.
 If the rotor is OK, go to step 10.
10. Remove the front bearing retainer.
11. Drive out the front bearing with a brass drift and a hammer.
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Alternator Brush Inspection Alternator Brush Length
Standard (New): 10.5 mm (0.41 in.)
Service Limit: 1.5 mm (0.06 in.) Rotor Slip Ring Test
4-41
07749-0010000
07746-0010300
B AA
BC
12. Install a new front bearing in the drive-end housing
with a hammer, the driver, and the attachment,
42x47mm.
13. Measure the length of both brushes (A) with a vernier caliper (B).
 If either brush is shorter than the service limit, replace the brush holder assembly.
 If brush length is OK, go to step 14. 14. Check for continuity between the slip rings (A).
 If there is continuity, go to step 15.
 If there is no continuity, replace the rotorassembly.
15. Check for continuity between each slip ring and the rotor (B) and the rotor shaft (C).
 If there is no continuity, replace the rear housing assembly, and go to step 16.
 If there is continuity, replace the rotor assembly.
(cont’d)
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Alternator Reassembly
4-42Charging System
Alternator Overhaul (cont’d)
A
B
16. If you removed the pulley, put the rotor in the drive- end housing, then tighten its locknut to 110 N·m
(11.2 kgf·m, 81.0 lbf·ft).
17. Remove any grease or any oil from the slip rings.
18. Put the rear housing assembly and the drive-end housing/rotor assembly together, tighten the four
through bolts.
19. Push the brushes (A) in, then insert a pin or drill bit (B) (about 1.6 mm (0.06 in.) diameter) to hold them
there.
20. Install the brush holder assembly, and pull out the pin or drill bit.
21. Install the end cover.
22. After assembling the alternator, turn the pulley by hand to make sure the rotor turns smoothly and
without noise.
23. Install the alternator (see page 4-36) and the drive belt (see page 4-31).
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