## PGM-FI System

#### DTC Troubleshooting (cont'd)

11-77

11. Check for continuity between ECM/PCM connector terminal E6 and body ground.

ECM/PCM CONNECTOR E (31P)

Wire side of female terminals

Is there continuity?

YES | - Repair short in the wire between the ECM/PCM (E6) and the secondary HO2S (Sensor 2).
NO | - Substitute a known-good ECM/PCM and recheck (see page 11-6). If symptom/indication goes away, replace the original ECM/PCM.

12. Measure voltage between the secondary HO2S (Sensor 2) 4P connector terminal No. 4 and body ground.

SECONDARY HO2S (SENSOR 2) 4P CONNECTOR

Terminal side of male terminals

Is there battery voltage?

YES | - Go to step 13.
NO | - Check the No. 4 ACG (10A) fuse in the under-dash fuse/relay box. If the fuse is OK, repair open in the wire between the secondary HO2S (Sensor 2) and No. 4 ACG (10A) fuse.

13. Turn the ignition switch OFF.
14. Reconnect the secondary HO2S (Sensor 2) 4P connector.
15. Disconnect ECM/PCM connector E (31P).
16. Turn the ignition switch ON (II).
17. Measure voltage between ECM/PCM connector terminal E6 and A5.

ECM/PCM CONNECTORS

Wire side of female terminals

Is there 0.1 V or less?

YES | - Repair open in the wire between the ECM/PCM (E6) and the secondary HO2S (Sensor 2).
NO | - Substitute a known-good ECM/PCM and recheck (see page 11-6). If symptom/indication goes away, replace the original ECM/PCM.