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Acura RSX Honda Integra. Manual - part 25

０３

＊０１

＊０２

−

YES

4-36

Charging System

Charging System Indicator Circuit Troubleshooting (cont’d)

ENGINE WIRE HARNESS 6P CONNECTOR

IG (BLK/YEL)

ALTL (WHT/BLU)

L (WHT/BLU)

ENGINE WIRE
HARNESS
6P CONNECTOR

ECM/PCM CONNECTOR B (24P)

ALTL (WHT/BLU)

ECM/PCM CONNECTOR B (24P)

7. Measure the voltage between engine wire harness

6P connector terminal No. 3 and body ground.

Go to step 8.

Check for a blown No. 4 (10 A) fuse in the

under-dash fuse/relay box. If the fuse is OK, repair
open in the wire between the alternator and under-
dash fuse/relay box.

8. Turn the ignition switch OFF.

NOTE: This step must be done to protect the engine
control module (ECM) from damage.

9. Disconnect ECM connector B (24P).

10. Check for continuity between ECM connector

terminal B10 and engine wire harness 6P connector
terminal No. 6.

Go to step 11.

Repair an open in the wire between the

alternator and the ECM.

11. Check for continuity between ECM connector

terminal B10 and body ground.

Repair a short in the wire between the

alternator and the ECM.

Go to the Alternator and Regulator Circuit

Troubleshooting (see page 4-39).

Wire side of female terminals

Is ther e batter y voltage?

Is ther e continuity?

＊０１

Ｓ６Ｍ６Ａ１３Ａ１４１００００００００ＦＡＡＴ００

−

K20Z1 Engine (2005-2006 Models)

YES

4-37

ALTL (WHT/BLU)

ECM/PCM CONNECTOR B (24P)

1. Turn the ignition switch ON (II).

Go to step 2.

Go to step 11.

2. Shift to Neutral, and start the engine. Hold the

engine speed at 2,000 rpm for 1 minute.

Charging system indicator circuit is OK. Go

to the Alternator and Regulator Circuit
Troubleshooting (see page 4-39).

Go to step 3.

3. Do the gauge assembly self-diagnostic function

procedure (see page 22-68).

Go to step 4.

Replace the gauge assembly (see page 22-74).

4. Turn the ignition switch OFF.

5. Disconnect the engine wire harness 6P connector

from the starter subharness 6P connector.

6. Turn the ignition switch ON (II).

Replace the alternator (see page 4-46) or

repair the alternator (see page 4-53).

Go to step 7.

7. Turn the ignition switch OFF.

8. Connect the Honda Diagnostic System (HDS) to the

data link connector (DLC) (see step 2 on page 11-3).
Turn the ignition switch ON (II), and jump the SCS
line with the HDS, then turn the ignition switch OFF.

NOTE: This step must be done to protect the engine
control module (ECM) from damage.

9. Disconnect ECM connector B (24P).

10. Check for continuity between ECM connector

terminal B10 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).

(cont’d)

Wire side of female terminals

Does the char ging system indicator come on?

Does the char ging system indicator go of f ?

Does the char ging system indicator f lash?

Does the char ging system indicator go of f ?

Is ther e continuity?

０２

＊０２

−

YES

4-38

Charging System

Charging System Indicator Circuit Troubleshooting (cont’d)

ENGINE WIRE HARNESS 6P CONNECTOR

L
(WHT/BLU)

JUMPER
WIRE

ALTL (WHT/BLU)

ECM/PCM CONNECTOR B (24P)

11. Do the gauge assembly self-diagnostic function

procedure (see page 22-68).

Go to step 12.

Replace the gauge assembly (see page 22-74).

12. Turn the ignition switch OFF.

13. Disconnect the engine wire harness 6P connector

from the starter subharness 6P connector.

14. Connect engine wire harness 6P connector terminal

No. 6 and body ground with a jumper wire.

15. Turn the ignition switch ON (II).

Replace the alternator (see page 4-46) or

repair the alternator (see page 4-53).

Go to step 16.

16. Connect the HDS to the DLC. Turn the ignition

switch ON (II), and jump the SCS line with the HDS,
then turn the ignition switch OFF.

NOTE: This step must be done to protect the ECM
from damage.

17. Disconnect ECM connector B (24P).

18. Check for continuity between ECM connector

terminal B10 and body ground.

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).

Repair an open in the wire between the

alternator and the ECM.

Wire side of female terminals

Does the char ging system indicator f lash?

Does the char ging system indicator come on?

Is ther e continuity?

−

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０７

Ｓ６Ｍ６Ａ００Ａ１４１０００１２９０１ＦＡＡＴ００

−

YES

4-39

Alternator and Regulator Circuit Troubleshooting

1. Make sure the battery is sufficiently charged

(see page 22-61).

2. Raise the hoist to full height.

3. Hook up the ammeter, 0

400 A, to the starter

subharness.

4. Lower the hoist.

5. Hook up the voltmeter, 0

20 V (accurate within

0.1 V), to T101.

6. Start the engine. Hold the engine speed at

3,000 rpm without load (in Park or Neutral) until the
radiator fan comes on, then let it idle.

7. Raise the engine speed to 2,000 rpm, and hold it

there.

8. Turn on the headlights to high beam, and measure

voltage at the under-hood fuse/relay box terminal.

Go to step 9.

Repair the alternator components:

• K20A3 engine (see page 4-46).
• K20A2, K20Z1 engines (see page 4-53).

9. Read the amperage at 13.5 V.

NOTE: Adjust the voltage by turning on the blower
motor, rear window defogger, brake lights, etc.

Alternator/regulator operation is OK. Go to

Alternator Control Circuit Troubleshooting
(see page 4-40).

Repair the alternator components:

• K20A3 engine (see page 4-46).
• K20A2, K20Z1 engines (see page 4-53).

Is the voltage between 13.9 and 15.1 V ?

Is the amper age 60 A or mor e?

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