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Acura RSX Honda Integra. Manual - part 26

０５

０１

＊０１

Ｓ６Ｍ６Ａ１１Ａ１４１０００１２９０５ＦＡＡＴ００

−

K20A3 Engine

YES

2002-2004 Models

2005-2006 Models

YES

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

Is ther e 1 V or less?

Is ther e continuity?

０２

＊０２

０９

Ｓ６Ｍ６Ａ１０Ａ１４１０００１２９０５ＦＡＡＴ００

−

2002-2004 Models

2005-2006 Models

YES

K20A2, K20Z1 Engines

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

Is ther e continuity?

Is ther e 1 V or less?

＊０１

＊０２

＊０４

＊０３

−

2002-2004 Models

2005-2006 Models

YES

2002-2004 Models

2005-2006 Models

YES

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

Is ther e continuity?

０１

Ｓ６Ｍ６Ａ００Ａ１４１０００２２２０１ＭＡＡＴ００

０１

Ｓ６Ｍ６Ａ００Ａ１４１０００２２２０１ＫＢＡＴ００

Special Tools Required

4-43

Drive Belt Inspection

Drive Belt Replacement

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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