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Honda Fit/Jazz - DLC Circuit Troubleshooting
Online Honda Fit/Jazz 2002-2005 Workshop repair manual used by professionals.
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Snip from the Manual
DLC Circuit Troubleshooting
1.Turn the ignition switch ON (II).2.Measure voltage between data link connector (DLC) terminal No. 16 and body ground.
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Is there battery voltage?
YES - Go to 3.
NO - Repair open in the wire between DLC terminal No. 16 and the No. 8 (15A) fuse in the under-hood fuse/relay box.n
3.Measure voltage between DLC terminals No. 4 and No. 16.
IMAGE REPLACED HERE
Is there battery voltage?
YES - Go to 4.
NO - Repair open in the wire between DLC terminal No. 4 and body ground.n
4.Measure voltage between DLC terminals No. 5 and No. 16.
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Is there battery voltage?
YES - Go to 5.
NO - Repair open in the wire between DLC terminal No. 5 and ECM/PCM (E3).n
5.Measure voltage between DLC terminals No. 5 and No. 7.
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Is there 8.5 V or more?
YES - Go to 11.
NO - Go to 6.
6.Turn the ignition switch OFF.
7.Disconnect the negative cable from the battery.
8.Disconnect ECM/PCM connector E (31P).
9.Check for continuity between DLC terminal No. 7 and body ground.
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Is there continuity?
YES - Repair short to ground in the wire between DLC terminal No. 7 and the ECM/PCM (E23). After repairing the wire, check the DTC with the scan tool/Honda PGM Tester and go to the DTC Troubleshooting Index.n
NO - Go to 10.
10.Check for continuity between DLC terminal No. 7 and ECM/PCM terminal E23.
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Is there continuity?
YES - Substitute a known-good ECM/PCM, and recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.n
NO - Repair open in the wire between DLC terminal No. 7 and the ECM/PCM (E23). After repairing the wire, check the DTC with the scan tool/Honda PGM Tester and go to the DTC Troubleshooting Index.n
11.Turn the ignition switch OFF.
12.Disconnect the negative cable from the battery.
13.Disconnect ECM/PCM connector E (31P).
14.Reconnect the negative cable from the battery.
15.Turn the ignition switch ON (II).
16.Measure voltage between DLC terminals No. 5 and No. 7.
IMAGE REPLACED HERE
Is there 0 V?
YES - Substitute a known-good ECM/PCM, and recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.n
NO - Repair short to ground in the wire between DLC terminal No. 7 and the ECM/PCM (E23). After repairing the wire, check the DTC with the scan tool/Honda PGM Tester and go to the DTC Troubleshooting Index.n
NO -