Heater Control Power and Ground Circuit Troubleshooting
- Check the No. 14(10 A) fuse in the under-dash fuse/relay box.
Is the fuse OK?
YES -Go to step 2.
NO -Replace the fuse, and recheck. If the fuse blows again, check for a short in the No. 14(10 A) fuse circuit.
- Disconnect the heater control panel 30P connector.
- Turn the ignition switch to ON (II).
- Measure the voltage between heater control panel 30P connector terminal No. 3 and body ground.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there battery voltage?
YES -Go to step 5.
NO -Repair an open in the wire between the No. 14 (10 A) fuse in the under-dash fuse/relay box and the heater control panel.
- Turn the ignition switch to LOCK (0).
- Check for continuity between heater control panel 30P connector No. 4 and body ground.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Check for loose wires or poor connections at the heater control panel 30P connector. If the connections are good, substitute a known-good heater control panel, and recheck. If the symptom/indication goes away, replace the original heater control panel (see HEATER CONTROL PANEL REMOVAL/INSTALLATION ).
NO -Check for an open in the wire between the heater control panel and body ground. If the wire is OK, check for poor body ground at G501; '07-08 models (see DASHBOARD WIRE HARNESS A (LEFT BRANCH) ('07-08 MODELS) ), '09-10 models (see DASHBOARD WIRE HARNESS A (LEFT BRANCH) ('09-10 MODEL) ).