Acura RSX Honda Integra. Manual — part 26
05
01
*01
S6M6A11A14100012905FAAT00
−
−
−
−
K20A3 Engine
YES
NO
2002-2004 Models
2005-2006 Models
YES
NO
4-40
Charging System
Alternator Control Circuit Troubleshooting
ENGINE WIRE HARNESS 8P CONNECTOR
C (WHT/GRN)
BATTERY
ECM/PCM CONNECTOR B (24P)
ALTC (WHT/GRN)
ECM/PCM CONNECTOR B (24P)
ALTC (WHT/GRN)
1. Check for proper operation of the electrical load
detector (ELD) by checking the malfunction
indicator lamp (MIL) (see page 11-3).
2. Connect the Honda Diagnostic System (HDS) to the
data link connector (DLC), and check for DTCs (see
step 2 on page 11-3). If a DTC is present, diagnose
and repair the cause before continuing with this
test.
3. Disconnect the engine wire harness 8P connector
from the starter subharness 8P connector.
4. Start the engine, and turn on the headlights to high
beam.
5. Measure the voltage between engine wire harness
8P connector terminal No. 3 and the positive
terminal of the battery.
Go to step 6.
Go to step 9.
6. Jump the SCS line with the HDS, then turn off the
headlights and ignition switch.
NOTE: This step must be done to protect the engine
control module (ECM)/powertrain control module
(PCM) from damage.
7. Disconnect ECM/PCM connector B (24P).
8. Check for continuity between ECM/PCM connector
terminal B18 and body ground.
Repair a short in the wire between the
alternator and the ECM/PCM.
Update the ECM/PCM if it does not have the
latest software (see page 11-6), 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 11-284).
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Is ther e 1 V or less?
Is ther e continuity?
02
*02
09
S6M6A10A14100012905FAAT00
−
−
−
−
2002-2004 Models
2005-2006 Models
YES
NO
YES
NO
K20A2, K20Z1 Engines
4-41
4-41
ECM/PCM CONNECTOR B (24P)
ENGINE WIRE HARNESS 8P CONNECTOR
ALTC (WHT/GRN)
C (WHT/GRN)
ENGINE WIRE HARNESS 8P CONNECTOR
ALTC (WHT/GRN)
C (WHT/GRN)
ECM/PCM CONNECTOR B (24P)
ENGINE WIRE HARNESS 6P CONNECTOR
C (WHT/GRN)
BATTERY
9. Jump the SCS line with the HDS, then turn off the
headlights and ignition switch.
NOTE: This step must be done to protect the ECM/
PCM for damage.
10. Disconnect ECM/PCM connector B (24P).
11. Check for continuity between ECM/PCM connector
terminal B18 and the engine wire harness 8P
connector terminal No. 3.
Replace the alternator (see page 4-46) or
repair the alternator (see page 4-48).
Repair an open in the wire between the
alternator and the ECM/PCM.
1. Check for proper operation of the electrical load
detector (ELD) by checking the malfunction
indicator lamp (MIL) (see page 11-3).
2. Connect the Honda Diagnostic System (HDS) to the
data link connector (DLC), and check for DTCs (see
step 2 on page 11-3). If a DTC is present, diagnose
and repair the cause before continuing with this
test.
3. Disconnect the engine wire harness 6P connector
from the starter subharness 6P connector.
4. Start the engine, and turn on the headlights to high
beam.
5. Measure the voltage between engine wire harness
6P connector terminal No. 2 and the positive
terminal of the battery.
Go to step 6.
Go to step 9.
6. Jump the SCS line with the HDS, then turn off the
headlights and ignition switch.
NOTE: This step must be done to protect the engine
control module (ECM) from damage.
7. Disconnect ECM connector B (24P).
(cont’d)
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Is ther e continuity?
Is ther e 1 V or less?
*01
*02
*04
*03
−
−
−
−
2002-2004 Models
2005-2006 Models
YES
NO
2002-2004 Models
2005-2006 Models
YES
NO
4-42
Charging System
Alternator Control Circuit Troubleshooting (cont’d)
ALTC (WHT/GRN)
ECM/PCM CONNECTOR B (24P)
ALTC (WHT/GRN)
ECM/PCM CONNECTOR B (24P)
ENGINE WIRE HARNESS 6P CONNECTOR
ALTC (WHT/GRN)
C (WHT/GRN)
ECM/PCM CONNECTOR B (24P)
ENGINE WIRE HARNESS 6P CONNECTOR
ALTC (WHT/GRN)
C (WHT/GRN)
ECM/PCM CONNECTOR B (24P)
8. Check for continuity between ECM connector
terminal B18 and body ground.
Repair a short in the wire between the
alternator and the ECM.
Update the ECM if it does not have the latest
software (see page 11-6), or substitute a known-
good ECM (see page 11-7), then recheck. If the
symptom/indication goes away with a known-good
ECM, replace the original ECM (see page 11-284).
9. Jump the SCS line with the HDS, then turn off the
headlights and ignition switch.
NOTE: This step must be done to protect the ECM
for damage.
10. Disconnect ECM connector B (24P).
11. Check for continuity between ECM connector
terminal B18 and the engine wire harness 6P
connector terminal No. 2.
Replace the alternator (see page 4-46) or
repair the alternator (see page 4-53).
Repair an open in the wire between the
alternator and the ECM.
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Is ther e continuity?
Is ther e continuity?
01
S6M6A00A14100022201MAAT00
01
S6M6A00A14100022201KBAT00
Special Tools Required
4-43
4-43
Drive Belt Inspection
Drive Belt Replacement
B
A
A
B
1. Inspect the belt for cracks and damage. If the belt is
cracked or damaged, replace it.
2. Check that 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
4-40).
Belt tension release tool Snap-on YA9317 or equivalent,
commercially available
1. Unclip the power steering reservoir.
2. Move the auto-tensioner (A) with the belt tension
release tool to relieve tension from the drive belt
(B), and remove the drive belt.
3. Install the new belt in the reverse order of removal.
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