DTC Troubleshooting: P0202, P0203 - Honda FIT GK 2014-2020

1.

Problem verification:

Problem verification

?1.	Turn the vehicle to the ON mode.

?2.	Clear the DTC with the HDS.

?3.	Start the engine. (If the engine does not start, crank the engine for 20 seconds).

?4.

Check for Pending or Confirmed DTCs with the HDS.

DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
P0202 No. 2 Cylinder Injector Circuit Malfunction
P0203 No. 3 Cylinder Injector Circuit Malfunction

Is DTC P0202 and/or P0203 indicated?


	YES

The failure is duplicated. Go to step 2.


	NO

Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the injector and the PCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.?

2.

Engine starting check:

Engine starting check

?1.	Try to start the engine.

Does the engine start?


	YES

Go to step 10.


	NO

Go to step 3.

3.

Relay check:

Relay check

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.	Remove the injector relay (A) from the under-hood fuse/relay box.

?3.	Test the injector relay.

Is the relay OK?


	YES

The injector relay is OK. Go to step 4.


	NO

Replace the injector relay.?

4.

Open wire check (FI MAIN RLY OUT line):

Open wire check (FI MAIN RLY OUT line)

?1.	Turn the vehicle to the ON mode.

?2.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode
Test condition	Injector relay: disconnected
Test point 1	Injector relay 4P socket No. 3
Test point 2	Body ground

Is there battery voltage?


	YES

The FI MAIN RLY OUT wire is OK. Go to step 5.


	NO

Repair an open in the FI MAIN RLY OUT wire between PGM-FI main relay 1 and the injector relay. If needed, replace the under-hood fuse/relay box.?

5.

Open wire check (+B INJ line):

Open wire check (+B INJ line)

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
Test condition	Injector relay: disconnected
Test point 1	Injector relay 4P socket No. 1
Test point 2	Body ground

Is there battery voltage?


	YES

The +B INJ wire is OK. Go to step 7.


	NO

Go to step 6.

6.

Fuse check:

Fuse check

?1.

Check the following fuse.

Fuse	No. B10 (20 A)
Location	Under-hood fuse/relay box

Is the fuse OK?


	YES

Repair an open in the +B INJ wire between the No. B10 (20 A) fuse and the injector relay. If needed, replace the under-hood fuse/relay box.?


	NO

Repair a short in the +B INJ wire between the No. B10 (20 A) fuse and the injector relay. If needed, replace the under-hood fuse/relay box. Also replace the No. B10 (20 A) fuse.?

7.

Determine possible failure area (INJ RLY CL- line, others):

Determine possible failure area (INJ RLY CL- line, others)

?1.

Turn the vehicle to the ON mode, and measure the voltage between test points 1 and 2 momentarily.

Test condition	Momentarily after ON mode
Test condition	Injector relay: disconnected
Test point 1	Injector relay 4P socket No. 3
Test point 2	Injector relay 4P socket No. 4

Is there battery voltage momentarily?


	YES

Go to step 9.


	NO

Go to step 8.

8.

Open wire check (INJ RLY CL- line):

Open wire check (INJ RLY CL- line)

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.	Jump the SCS line with the HDS.

?3.

Disconnect the following connector.

PCM connector A (51P)

?4.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Injector relay: disconnected
	PCM connector A (51P): disconnected
Test point 1	Injector relay 4P socket No. 4
Test point 2	PCM connector A (51P) No. 15

Is there continuity?


	YES

The INJ RLY CL- wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If DTC P0202 and/or P0203 goes away and the PCM was updated, troubleshooting is complete. If DTC P0202 and/or P0203 goes away and the PCM was substituted, replace the original PCM.?


	NO

Repair an open in the INJ RLY CL- wire between the injector relay and the PCM (A15).?

9.

Open wire check (INJ RLY OUT line):

Open wire check (INJ RLY OUT line)

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.

Connect terminals A and B with a jumper wire.

Terminal A	Injector relay 4P socket No. 1
Terminal B	Injector relay 4P socket No. 2

?3.	Jump the SCS line with the HDS.

?4.

Disconnect the following connector.

PCM connector A (51P)

?5.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Injector relay: disconnected
	Injector relay 4P socket terminal No. 1 and No. 2: jumped
	PCM connector A (51P): disconnected
Test point 1	PCM connector A (51P) No. 6 and No. 7
Test point 2	Body ground

Are there battery voltage?


	YES

The INJ RLY OUT wire is OK. Go to step 10.


	NO

Repair an open in the INJ RLY OUT wire between the injector relay and the PCM (A6, A7).?

10.

DTC check:

DTC check

?1.	Check the indicated DTC in step 1.

Is DTC P0202 indicated?


	YES

Go to step 11.


	NO

Go to step 19.

11.

Open wire check (INJH2, INJL2 line):

Open wire check (INJH2, INJL2 line)

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.	Install the injector relay.

?3.	Jump the SCS line with the HDS.

?4.

Disconnect the following connector.

PCM connector B (51P)

?5.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	PCM connector B (51P): disconnected
Test point 1	PCM connector B (51P) No. 5
Test point 2	PCM connector B (51P) No. 6

Is there continuity?


	YES

The INJH2 and INJL2 wires are not open. Go to step 14.


	NO

Go to step 12.

12.

Open wire check (INJH2 line):

Open wire check (INJH2 line)

?1.

Disconnect the following connector.

No. 2 injector 2P connector

?2.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	PCM connector B (51P): disconnected
	No. 2 injector 2P connector: disconnected
Test point 1	PCM connector B (51P) No. 5
Test point 2	No. 2 injector 2P connector No. 1

Is there continuity?


	YES

The INJH2 wire is OK. Go to step 13.


	NO

Repair an open in the INJH2 wire between the No. 2 injector and the PCM (B5).?

13.

Open wire check (INJL2 line):

Open wire check (INJL2 line)

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	PCM connector B (51P): disconnected
	No. 2 injector 2P connector: disconnected
Test point 1	PCM connector B (51P) No. 6
Test point 2	No. 2 injector 2P connector No. 2

Is there continuity?


	YES

The INJL2 wire is OK. Failure in No. 2 injector. Replace all injectors as a set.?


	NO

Repair an open in the INJL2 wire between the No. 2 injector and the PCM (B6).?

14.

Shorted wire check (INJH2 line to power):

Shorted wire check (INJH2 line to power)

?1.

Disconnect the following connector.

No. 2 injector 2P connector

?2.	Turn the vehicle to the ON mode.

?3.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode
	PCM connector A (51P): disconnected
	PCM connector B (51P): disconnected
	No. 2 injector 2P connector: disconnected
Test point 1	PCM connector B (51P) No. 5
Test point 2	Body ground

Is there any voltage?


	YES

Repair a short to power in the INJH2 wire between the No. 2 injector and the PCM (B5).?


	NO

Go to step 15

15.

Shorted wire check (INJL2 line to power):

Shorted wire check (INJL2 line to power)

?1.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode
	PCM connector A (51P): disconnected
	PCM connector B (51P): disconnected
	No. 2 injector 2P connector: disconnected
Test point 1	PCM connector B (51P) No. 6
Test point 2	Body ground

Is there any voltage?


	YES

Repair a short to power in the INJL2 wire between the No. 2 injector and the PCM (B6).?


	NO

Go to step 16.

16.

Shorted wire check (INJH2 line):

Shorted wire check (INJH2 line)

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	PCM connector B (51P): disconnected
	No. 2 injector 2P connector: disconnected
Test point 1	PCM connector B (51P) No. 5
Test point 2	Body ground

Is there continuity?


	YES

Repair a short in the INJH2 wire between the No. 2 injector and the PCM (B5).?


	NO

The INJH2 wire is OK. Go to step 17.

17.

Shorted wire check (INJL2):

Shorted wire check (INJL2)

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	PCM connector B (51P): disconnected
	No. 2 injector 2P connector: disconnected
Test point 1	PCM connector B (51P) No. 6
Test point 2	Body ground

Is there continuity?


	YES

Repair a short in the INJL2 wire between the No. 2 injector and the PCM (B6).?


	NO

The INJL2 wire is OK. Go to step 18.

18.

Shorted wire check (INJH3 line):

Shorted wire check (INJH3 line)

?1.

Disconnect the following connector.

No. 3 injector 2P connector

?2.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	PCM connector B (51P): disconnected
	No. 2 injector 2P connector: disconnected
	No. 3 injector 2P connector: disconnected
Test point 1	PCM connector B (51P) No. 7
Test point 2	Body ground

Is there continuity?


	YES

Repair a short in the INJH3 wire between the No. 3 injector and the PCM (B7).?


	NO

The INJH3 wire is OK. The INJ RLY CL- wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If DTC P0202 and/or P0203 goes away and the PCM was updated, troubleshooting is complete. If DTC P0202 and/or P0203 goes away and the PCM was substituted, replace the original PCM.?

19.

Open wire check (INJH3, INJL3 line):

Open wire check (INJH3, INJL3 line)

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.	Install the injector relay.

?3.	Jump the SCS line with the HDS.

?4.

Disconnect the following connector.

PCM connector B (51P)

?5.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	PCM connector B (51P): disconnected
Test point 1	PCM connector B (51P) No. 7
Test point 2	PCM connector B (51P) No. 8

Is there continuity?


	YES

The INJH3 and INJL3 wires are not open. Go to step 22.


	NO

Go to step 20.

20.

Open wire check (INJH3 line):

Open wire check (INJH3 line)

?1.

Disconnect the following connector.

No. 3 injector 2P connector

?2.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	PCM connector B (51P): disconnected
	No. 3 injector 2P connector: disconnected
Test point 1	PCM connector B (51P) No. 7
Test point 2	No. 3 injector 2P connector No. 1

Is there continuity?


	YES

The INJH3 wire is OK. Go to step 21.


	NO

Repair an open in the INJH3 wire between the No. 3 injector and the PCM (B7).?

21.

Open wire check (INJL3 line):

Open wire check (INJL3 line)

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	PCM connector B (51P): disconnected
	No. 3 injector 2P connector: disconnected
Test point 1	PCM connector B (51P) No. 8
Test point 2	No. 3 injector 2P connector No. 2

Is there continuity?


	YES

The INJL3 wire is OK. Failure in No. 3 injector. Replace all injectors as a set.?


	NO

Repair an open in the INJL3 wire between the No. 3 injector and the PCM (B8).?

22.

Shorted wire check (INJH3 line to power):

Shorted wire check (INJH3 line to power)

?1.

Disconnect the following connector.

No. 3 injector 2P connector

?2.	Turn the vehicle to the ON mode.

?3.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode
	PCM connector A (51P): disconnected
	PCM connector B (51P): disconnected
	No. 3 injector 2P connector: disconnected
Test point 1	PCM connector B (51P) No. 7
Test point 2	Body ground

Is there voltage?


	YES

Repair a short to power in the INJH3 wire between the No. 3 injector and the PCM (B7).?


	NO

Go to step 23.

23.

Shorted wire check (INJL3 line to power):

Shorted wire check (INJL3 line to power)

?1.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode
	PCM connector A (51P): disconnected
	PCM connector B (51P): disconnected
	No. 3 injector 2P connector: disconnected
Test point 1	PCM connector B (51P) No. 8
Test point 2	Body ground

Is there voltage?


	YES

Repair a short to power in the INJL3 wire between the No. 3 injector and the PCM (B8).?


	NO

Go to step 24.

24.

Shorted wire check (INJH3 line):

Shorted wire check (INJH3 line)

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	PCM connector B (51P): disconnected
	No. 3 injector 2P connector: disconnected
Test point 1	PCM connector B (51P) No. 7
Test point 2	Body ground

Is there continuity?


	YES

Repair a short in the INJH3 wire between the No. 3 injector and the PCM (B7).?


	NO

The INJH3 wire is OK. Go to step 25.

25.

Shorted wire check (INJL3):

Shorted wire check (INJL3)

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	PCM connector B (51P): disconnected
	No. 3 injector 2P connector: disconnected
Test point 1	PCM connector B (51P) No. 8
Test point 2	Body ground

Is there continuity?


	YES

Repair a short in the INJL3 wire between the No. 3 injector and the PCM (B8).?


	NO

The INJL3 wire is OK. Go to step 26.

26.

Shorted wire check (INJH2 line):

Shorted wire check (INJH2 line)

?1.

Disconnect the following connector.

No. 2 injector 2P connector

?2.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	PCM connector B (51P): disconnected
	No. 2 injector 2P connector: disconnected
	No. 3 injector 2P connector: disconnected
Test point 1	PCM connector B (51P) No. 5
Test point 2	Body ground

Is there continuity?


	YES

Repair a short in the INJH2 wire between the No. 2 injector and the PCM (B5).?


	NO

The INJH2 wire is OK. The INJ RLY CL- wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If DTC P0202 and/or P0203 goes away and the PCM was updated, troubleshooting is complete. If DTC P0202 and/or P0203 goes away and the PCM was substituted, replace the original PCM.?