Civic (1.6L SOHC VTEC-E With M/T) & Prelude
CAUTION:
If vehicle has immobilizer system, when substituting a known-good ECM, immobilizer code must be rewritten using Honda PGM tester, or engine will not start.
- Turn ignition off. Disconnect 4-pin generator harness connector. Start engine and turn headlights on (high beam). Check voltage between battery positive terminal and generator harness connector terminal No. 2 (White/Green wire). See Figure . If voltage reading is one volt or less, go to next step. If voltage reading is more than one volt, go to step 3 .
- Turn ignition and headlights off. Disconnect ECM/PCM 32-pin harness connector. Check continuity of White/Green wire between ECM/PCM harness connector terminal No. 19 and generator harness connector terminal No. 2. See Figure and Fig 1 . If continuity exists, test generator/regulator. See GENERATOR/REGULATOR TEST . If continuity does not exist, repair open White/Green wire between generator and ECM/PCM.
- Turn ignition and headlights off. Disconnect ECM/PCM 32-pin harness connector. Check continuity between chassis ground and ECM/PCM 32-pin harness connector terminal No. 19 (White/Green wire). If continuity exists, repair short to ground in White/Green wire between ECM/PCM and generator harness connectors.
- If continuity does not exist, substitute a known-good ECM/PCM. Recheck system operation. If specified voltage is now available, replace original ECM/PCM.