Honda Civic. Manual — part 672

Fig. 58: Checking Continuity Between Body Ground And PCM Connector
Terminals

CONTINUITY REFERENCE

Is there continuity?

YES -Go to step 12.

NO -Repair open in the wire between the PCM and the injector control
module.

PCM

TERMINAL

PCM

TERMINAL

NAME

INJECTOR CONTROL

MODULE TERMINAL

WIRE

COLOR

C5

INJCNTL1

No. 11

BRN/BLK

C6

INJCNTL2

No. 10

RED/BLK

C7

INJCNTL3

No. 9

BLU/BLK

C8

INJCNTL4

No. 8

YEL/BLK

A43

INJMODE

No. 24

ORN

2008 Honda Civic GX

2006-08 ENGINE PERFORMANCE Fuel Supply System - Civic GX

12. Turn the ignition switch ON (II), then measure voltage between body ground

and injector control module 26P connector terminals No. 13, No. 26, and
injector 2P connector terminal No. 1 within 2 seconds.

Fig. 59: Measuring Voltage Between Body Ground And Injector Control
Module 26P Connector Terminals No. 13 And 26

Fig. 60: Measuring Voltage Between Body Ground And Injector 2P
Connector Terminal No. 1

Is there battery voltage?

YES -Go to step 13.

NO -Check the injector relay circuit (see INJECTOR CONTROL MODULE
RELAY CIRCUIT TROUBLESHOOTING ).

13. Check for continuity between body ground and injector control module 26P

connector terminals No. 3, No. 12, No. 16, and No. 25 individually.

2008 Honda Civic GX

2006-08 ENGINE PERFORMANCE Fuel Supply System - Civic GX

Fig. 61: Checking Continuity Between Body Ground And Injector Control
Module 26P Terminals

Is there continuity?

YES -Go to step 14.

NO -Repair open in the wire(s) between the injector control module, G101,
and the PCM.

14. Turn the ignition switch OFF.
15. Substitute a known-good injector control module (see FUEL

TEMPERATURE SENSOR REPLACEMENT ).

16. Reconnect all connectors.
17. Try to start the engine.

Does the engine start?

YES -Replace the original injector control module (see FUEL
TEMPERATURE SENSOR REPLACEMENT ).

NO -Go to step 18.

18. Turn the ignition switch OFF.
19. Turn the ignition switch ON (II), and listen for a clicking sound from the

injectors within 2 seconds.

Do all the injectors click?

2008 Honda Civic GX

2006-08 ENGINE PERFORMANCE Fuel Supply System - Civic GX

YES -Update the PCM if it does not have the latest software (see UPDATING
THE PCM ), or substitute a known-good PCM (see SUBSTITUTING THE
PCM ), then recheck. If the symptom/indication goes away with a known-good
PCM, replace the original PCM, refer to the ECM/PCM REPLACEMENT .

NO -Go to step 20.

20. Disconnect the injector 2P connector from the problem cylinder.
21. At injector side, measure resistance between injector 2P connector terminals

No. 1 and No. 2.

Fig. 62: Measuring Resistance Between Injector 2P Connector Terminals
No. 1 And 2

Is there 1.14-1.26 ohms at 68 °F (20 °C)?

YES -Check for poor connections or loose terminals at the injector control
module, the injector, and the PCM.

NO -Replace the injector(s) (see INJECTOR REPLACEMENT ).

INJECTOR CONTROL MODULE RELAY CIRCUIT TROUBLESHOOTING

1. Turn the ignition switch OFF.
2. Remove the driver's dashboard undercover, refer to the DRIVER'S

DASHBOARD UNDERCOVER REMOVAL/INSTALLATION .

3. Remove the injector control module relay (A).

2008 Honda Civic GX

2006-08 ENGINE PERFORMANCE Fuel Supply System - Civic GX