## PGM-FI System

#### MIL Circuit Troubleshooting (cont'd)

11-109

69. Check for continuity between ECM/PCM connector terminal A20 and body ground.

ECM/PCM CONNECTOR A (31P)

Wire side of female terminals

Is there continuity?

YES | - Repair short in the wire between the ECM/PCM (A20) and the EGR valve position sensor, knock sensor or TP sensor, or repair short in the wire between the ECM/PCM (A8) and the knock sensor.
NO | - Substitute a known-good ECM/PCM and recheck (see page 11-6). If symptom/indication goes away, replace the original ECM/PCM.

70. Turn the ignition switch OFF.

71. Connect a scan tool/Honda PGM Tester (see page 11-3).
72. Turn the ignition switch ON (II), and read the scan tool/Honda PGM Tester.

Does the scan tool/Honda PGM Tester communicate with the ECM/PCM?

YES | - Go to step 77.
NO | - Go to step 73.

73. Turn the ignition switch OFF.
74. Disconnect ECM/PCM connector E (31P).
75. Check for continuity between body ground and data link connector (DLC) terminal No. 7.

DATA LINK CONNECTOR (DLC)

Terminal side of male terminals

Is there continuity?

YES | - Repair short in the wire between the DLC and the ECM/PCM (E23). After repairing it, check the DTC with the scan tool/Honda PGM Tester and go to the DTC Troubleshooting Index.
NO | - Go to step 76.