Honda Civic 2002-2003 Service Manual page 297

PGM-FI System
DTe Troubleshooting (cont'd)
9. Connect ECM connector terminal E8 to body
ground with a jumper wire, then measure voltage
between ECM connector terminals AI and A24.
ECM CONNECTORS
E 131 PI AFSHTCRIORNI
1 2 3 4 5 6 7
141516 18 2021
26 27 2930 31
AI31 PI
9
Wire side of female terminals
Is there battery voltage?
JUMPER
WIRE
=
YES- Update the ECM if it does not have the latest
software, or substitute a known-good ECM, then
recheck (see page 11-61. If the symptom/indication
goes away with a known-good ECM, replace the
original ECM .•
NO-Repair open in the wire between the NF
sensor (Sensor 11 and ECM (All .•
10. Turn the ignition switch OFF.
11. Disconnect the ECM connector A (31 PI and the NF
sensor (Sensor 11 4P connector.
12. Check for continuity between the NF sensor
(Sensor 11 4P connector terminal NO.3 and body
ground.
11-90
A/F SENSOR ISENSOR 11 4P CONNECTOR
AF2HTC+
IWHTI
=
Wire side of female terminals
Is there continuity?
YES-Repair short in the wire between the NF
sensor relay, NF sensor (Sensor 11 and ECM
(A221 .•
NO-Go to step 13.
13. Turn the ignition switch ON (III.
14. Measure voltage between ECM connector
terminals E8 and A24.
ECM CONNECTORS
E 131 PI
A 131 PI
Wire side of female terminals
Is there battery voltage?
YES-Repair open in the wire between the ECM
(A221 and the NF sensor (Sensor 11 .•
NO-Go to step 15.
15. Check for continuity in the wires between the NF
sensor and the fuses.
Is there continuity?
YES- The wires are OK. Replacethe NF sensor
relay .•
NO-Repair open in the wire between the NF
sensor relay and the fuses .•
•
•