Injector Control Module Circuit Troubleshooting

Turn the ignition switch to LOCK (0).
Disconnect the injector control module 26P connector (see FUEL TEMPERATURE SENSOR REPLACEMENT ).
Disconnect the injector 2P connectors.

Check for continuity between each injector 2P connector terminal No. 2 and body ground (see table).

CONNECTOR PINOUTS DESCRIPTION CHART

INJECTOR	INJECTOR CONTROL MODULE TERMINAL	WIRE COLOR
No. 1	No. 2	BRN
No. 2	No. 1	RED
No. 3	No. 15	BLU
No. 4	No. 14	YEL

Fig 1: Checking Continuity Between Each Injector 2P Connector Terminal No. 2 And Body Ground

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair short in the wire between the injector control module and the injector.

NO -Go to step 5.

Connect each injector 2P connector terminal No. 2 to body ground with a jumper wire.

Fig 2: Connecting Injector 2P Connector Terminal No. 2 To Body Ground With Jumper Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Check for continuity between body ground and injector control module 26P connector terminals No. 1, No. 2, No. 14, and No. 15.

Fig 3: Checking Continuity Between Body Ground And Injector Control Module 26P Connector Terminals No. 1, No. 2, No. 14, And No. 15
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 7.

NO -Repair open in the wire between the injector control module and the injector.
Jump the SCS line with the HDS.
Disconnect PCM connectors A (44P) and C (44P).

Check for continuity between body ground and the PCM connector terminals (see table).

CONNECTOR PINOUTS DESCRIPTION CHART

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

Fig 4: Checking Continuity Between Body Ground And PCM Connector Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair short in the wire between the PCM and the injector control module.

NO -Go to step 10.

Connect injector control module 26P connector terminals No. 8, No. 9, No. 10, No. 11, and No. 24 to body ground with a jumper wire (see table).

CONNECTOR PINOUTS DESCRIPTION CHART

PCM TERMINAL	PCM TERMINAL NAME	INJECTOR CONTROL MODULE TERMINAL	WIRE COLOR
C5	INJCNTL1	No. 11	YEL
C6	INJCNTL2	No. 10	GRY
C7	INJCNTL3	No. 9	PNK
C8	INJCNTL4	No. 8	LT GRN
A43	INJMODE	No. 24	ORN

Fig 5: Connecting Injector Control Module 26P Connector Terminals No. 8, No. 9, No. 10, No. 11, And No. 24 To Body Ground With Jumper Wire

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Check for continuity between body ground and the PCM connector terminals (see table).

CONNECTOR PINOUTS DESCRIPTION CHART

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

Fig 6: Checking Continuity Between Body Ground And PCM Connector Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 12.

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

Turn the ignition switch to ON (II), then measure the voltage between body ground and injector control module 26P connector terminals No. 13 and No. 26, and injector 2P connector terminal No. 1 within 2 seconds.

Fig 7: Measuring Voltage Between Body Ground And Injector Control Module 26P Connector Terminals No. 13 And No. 26
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 8: Measuring Voltage Between Body Ground And Injector Control Module Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES -Go to step 13.

NO -Check the injector control module relay circuit (see INJECTOR CONTROL MODULE RELAY CIRCUIT TROUBLESHOOTING ).
Check for continuity between body ground and injector control module 26P connector terminals No. 3, No. 12, No. 16, and No. 25 individually.

Fig 9: Checking Continuity Between Body Ground And Injector Control Module 26P Connector Terminals No. 3, No. 12, No. 16, And No. 25
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 14.

NO -Repair open in the wire(s) between the injector control module, G101, and the PCM.
Turn the ignition switch to LOCK (0).
Substitute a known-good injector control module (see FUEL TEMPERATURE SENSOR REPLACEMENT ).
Reconnect all connectors.
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.
Turn the ignition switch to LOCK (0).
Turn the ignition switch to ON (II), and listen for a clicking sound from the injectors within 2 seconds.
Do all the injectors click?

YES -Update the PCM if it does not have the latest software (see PCM UPDATE ), or substitute a known-good PCM (see SUBSTITUTING THE PCM ), then recheck. If the symptom/indication goes away and the PCM was updated, troubleshooting is complete. If the symptom/indication goes away and the PCM was substituted, replace the original PCM, refer to ECM/PCM REPLACEMENT .

NO -Go to step 20.
Disconnect the injector 2P connector from the problem cylinder.
At the injector side, measure the resistance between injector 2P connector terminals No. 1 and No. 2.

Fig 10: Measuring Resistance Between Injector 2P Connector Terminals No. 1 And No. 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there 1.14-1.26 Ω 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 ).