S2000 L4-2.2L (2004)
7. Check for continuity between the No.26 terminal of the heater control panel 30P connector and body ground.
Is there continuity?
YES - Go to step 8.
NO - Check for an open in the wire between the heater control panel and body ground. If the wire is OK, check for poor ground at G402.
8. Disconnect the air mix control motor 7P connector.
9. Check for continuity between the No.5 terminal of the heater control panel 30P connector and body ground.
Is there continuity?
YES - Repair short to body ground in the wire between the heater control panel and the air mix control motor.
NO - 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.