Injector Harness Inspection - Honda BF135A Manual

BF135A•BF150A

• Injector Harness Inspection

Check with test harness:
1. Turn the ignition switch OFF and disconnect each 2P
connector from the respective injectors.
2. Connect the test harness.
• Disconnect the connector A, B, and C from the ECM.
3. Check for the continuity between the test harness and
each injector harness side 2P connector:
B-21 No.2 (Brown) of the No.1 injector
B-23 No.2 (Red) of the No.2 injector
B-27 No.2 (Blue) of the No.3 injector
B-29 No.2 (Yellow) of the No.4 injector
B-21
B-23
RED
BROWN
No. 1
No. 2
INJECTOR HARNESS
SIDE 2P CONNECTORS
VIEWED FROM THE TERMINAL SIDE
Is there the continuity?
YES – Go to the step 4.
NO – Repair open in the wire between the injector
and ECM.
4. Check for the continuity between the test harness and
engine ground:
B-21 terminal and the engine ground,
B-23 terminal and the engine ground
B-27 terminal and the engine ground
B-29 terminal and the engine ground.
B-21
B-23
B-29
B-27
YELLOW
BLUE
No. 4
No. 3
B-29
B-27
Is there the continuity?
YES – Repair open in the wire between the ECM
and the injector
NO – Go to the step 5.
5. Connect each injector 2P connector.
6. Turn the ignition switch ON. Check for the voltage
between the test harness and engine ground:
B-21 terminal and the engine ground
B-23 terminal and the engine ground
B-27 terminal and the engine ground
B-29 terminal and the engine ground
B-21
B-23
Is there the battery voltage?
YES – End of the check (Good)
NO – Check the injector (P . 5-105). If it is normal,
repair open in the wire between the No.4
(15A) fuse and the injector.
B-29
B-27
5-100