Acura CSX. Instruction — page 81

*06

*07

YES

NO

YES

NO

10-28

Fan Controls

FAN CONTROL RELAY 5P SOCKET

RADIATOR FAN MOTOR 2P CONNECTOR

RED

RADIATOR FAN RELAY 4P SOCKET

9. Check for continuity between fan control relay 5P

socket terminal No. 1 and radiator fan motor 2P
connector terminal No. 1.

Check for poor connections or loose

terminals at the under-hood fuse/relay box, the
radiator fan motor, and body ground (G301), then
go to step 1.

Repair open in the wire between fan control

relay 5P socket terminal No. 1 and radiator fan
motor 2P connector terminal No. 1.

10. Turn the ignition switch to ON (II).

11. Measure the voltage between radiator fan relay 4P

socket terminal No. 3 and body ground.

Go to step 12.

Repair open in the wire between the under-

dash fuse/relay box and the under-hood fuse/relay
box.

12. Turn the ignition switch to LOCK (0).

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

data link connector (DLC) (see step 2 on page 11-3).

14. Turn the ignition switch to ON (II).

15. Make sure the HDS communicates with the vehicle

and the ECM/PCM. If it does not communicate,
troubleshoot the DLC circuit (see page 11-204).

16. 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.

17. Disconnect ECM/PCM connector A (44P).

Terminal side of female termianls

Wire side of female terminals

Terminal side of female terminals

Is ther e continuity?

Is ther e batter y voltage?

08/08/21 14:40:33 61SNR030_100_0028

*08

*09

YES

NO

YES

NO

10-29

RADIATOR FAN RELAY 4P SOCKET

ECM/PCM CONNECTOR A (44P)

PUR

FAN CONTROL RELAY 5P SOCKET

18. Check for continuity between radiator fan relay 4P

socket terminal No. 4 and ECM/PCM connector
terminal A4.

Go to step 19.

Repair open in the wire between radiator fan

relay 4P socket terminal No. 4 and ECM/PCM
connector terminal A4.

19. Turn the ignition switch to ON (II).

20. Measure the voltage between fan motor control

relay 5P socket terminal No. 5 and body ground.

Go to step 21.

Repair open in the wire between the under-

dash fuse/relay box and the under-hood fuse/relay
box.

21. Turn the ignition switch to LOCK (0).

Terminal side of female terminals

Terminal side of female terminals

Terminal side of female terminals

Is ther e continuity?

Is ther e batter y voltage?

08/08/21 14:40:34 61SNR030_100_0029

*10

YES

NO

10-30

Fan Controls

FAN CONTROL RELAY 5P SOCKET

FANH (GRY)

ECM/PCM CONNECTOR A (44P)

22. Check for continuity between fan control relay 5P

socket terminal No. 3 and ECM/PCM connector
terminal A5.

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 goes away with a known-
good ECM/PCM, replace the original ECM/PCM
(see page 11-228).

Repair open in the wire between fan control

relay 5P socket terminal No. 3 and ECM/PCM
connector terminal A5.

Terminal side of female terminals

Terminal side of female terminals

Is ther e continuity?

08/08/21 14:40:34 61SNR030_100_0030

SNR9A000000000J1101ZCAT00

Fuel and Emissions

Fuel and Emissions Systems

PGM-FI System

Electronic Throttle Control System

VTEC/VTC

Idle Control System

Fuel Supply System

Intake Air System

Catalytic Converter System

EGR System

PCV System

EVAP System

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Special Tools

. 11-2

General Troubleshooting Information

. 11-3

DTC Troubleshooting Index

. 11-9

Symptom Troubleshooting Index

. 11-13

System Description

. 11-15

How to Set Readiness Codes

. 11-69

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Component Location Index

. 11-72

DTC Troubleshooting

. 11-74

F-CAN Circuit Troubleshooting

. 11-191

MIL Circuit Troubleshooting

. 11-203

DLC Circuit Troubleshooting

. 11-204

Injector Replacement

. 11-219

A/F Sensor Replacement

. 11-221

Secondary HO2S Replacement

. 11-221

CMP Sensor B Replacement

. 11-222

CKP Sensor Replacement

. 11-222

Output Shaft (Countershaft) Speed Sensor

Replacement

. 11-223

Knock Sensor Replacement

. 11-223

MAP Sensor Replacement

. 11-224

MAF Sensor/IAT Sensor Replacement

. 11-224

ECT Sensor 1 Replacement

. 11-225

ECT Sensor 2 Replacement

. 11-225

ELD Replacement

. 11-226

ECM/PCM Update

. 11-227

ECM/PCM Replacement

. 11-228

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Component Location Index

. 11-231

DTC Troubleshooting

. 11-232

APP Sensor Signal Inspection

. 11-268

Accelerator Pedal Module

Removal/Installation

. 11-269

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Component Location Index

. 11-273

DTC Troubleshooting

. 11-274

VTC Oil Control Solenoid Valve

Removal/Test/Installation

. 11-294

CMP Sensor A Replacement

. 11-295

Rocker Arm Oil Control Valve

Removal/Installation

. 11-296

Rocker Arm Oil Pressure Switch

Removal/Installation

. 11-296

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Component Location Index

. 11-297

DTC Troubleshooting

. 11-298

A/C Signal Circuit Troubleshooting

. 11-306

Alternator FR Signal Circuit

Troubleshooting

. 11-307

Brake Pedal Position Switch Signal Circuit

Troubleshooting

. 11-308

Idle Speed Inspection

. 11-309

ECM/PCM Idle Learn Procedure

. 11-310

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Component Location Index

. 11-311

DTC Troubleshooting

. 11-313

Fuel Pump Circuit Troubleshooting

. 11-318

Fuel Pressure Relieving

. 11-322

Fuel Pressure Test

. 11-325

Fuel Tank Draining

. 11-325

Fuel Line Inspection

. 11-326

Fuel Line/Quick-Connect Fitting

Precautions

. 11-328

Fuel Line/Quick-Connect Fitting

Removal

. 11-329

Fuel Line/Quick-Connect Fitting

Installation

. 11-331

Fuel Tank Unit Removal and Installation

. 11-334

Fuel Pressure Regulator Replacement

. 11-337

Fuel Filter Replacement

. 11-337

Fuel Pump/Fuel Gauge Sending Unit

Replacement

. 11-338

Fuel Tank Replacement

. 11-339

Fuel Gauge Sending Unit Test

. 11-340

Low Fuel Indicator Test

. 11-341

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Component Location Index

. 11-342

Throttle Body Test

. 11-343

Throttle Body Cleaning

. 11-344

Intake Air Bypass Control Thermal Valve

Test

. 11-344

Air Cleaner Removal/Installation

. 11-345

Air Cleaner Element

Inspection/Replacement

. 11-346

Intake Air Resonator Removal/Installation

. 11-346

Throttle Body Removal/Installation

. 11-348

Throttle Body Disassembly/Reassembly

. 11-350

Intake Air Bypass Control Thermal Valve

Replacement

. 11-351

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Component Location Index

. 11-352

DTC Troubleshooting

. 11-353

Catalytic Converter Removal/Installation

. 11-355

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Component Location Index

. 11-356

DTC Troubleshooting

. 11-357

EGR Valve Replacement

. 11-370

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Component Location Index

. 11-371

PCV Valve Inspection

. 11-372

PCV Valve Replacement

. 11-373

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Component Location Index

. 11-374

DTC Troubleshooting

. 11-375

Fuel Cap Warning Message System

Troubleshooting

. 11-405

EVAP Canister Replacement

. 11-407

FTP Sensor Replacement

. 11-408

EVAP Canister Vent Shut Valve

Replacement

. 11-409

EVAP Canister Purge Valve

Replacement

. 11-409

08/08/21 14:12:30 61SNR030_110_0001

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