DTC 2: A Problem in the Mode Control Motor Circuit

WARNING: This page is about a different car, the 2009 Honda S2000 and 2008 Honda S2000. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the mode control motor 7P connector.
Test the mode control motor (see MODE CONTROL MOTOR TEST ).
Is the mode control motor OK?

YES- Go to step 3.

NO- Go to step 7.
Disconnect the heater control panel 30P connector.
Check for continuity between body ground and the heater control panel 30P connector No. 3, 4,8, 9, 10,21, and 22 terminals individually.

Fig 1: Checking Continuity Between Body Ground And Heater Control Panel 30P Connector No. 3, 4,8, 9, 10,21, And 22 Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES- Repair short to body ground in the wire(s) between the heater control panel and the mode control motor.

NO- Go to step 5.
Turn the ignition switch to ON (II), and measure the same terminals for voltage.

Fig 2: Measuring Terminals Voltage
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there any voltage?

YES- Repair short to power in the wire(s) between the heater control panel and the mode control motor. This short may also damage the heater control panel. Repair the short to power before replacing the heater control panel.

NO- Go to step 6.

Turn the ignition switch to LOCK (0), and check for continuity between the following terminals of the heater control panel 30P connector and the mode control motor 7P connector.

30P	7P
No. 3	No. 2
No. 4	No. 1
No. 8	No. 5
No. 9	No. 6
No. 10	No. 7
No. 21	No. 3
No. 22	No. 4

Fig 3: Checking Continuity Between Terminals Of Heater Control Panel 30P Connector And Mode Control Motor 7P Connector

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 and at the mode control motor 7P 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.

NO- Repair open in the wire(s) between the heater control panel and mode control motor.

Remove the mode control motor (see Mode Control Motor Replacement ).
Check the mode control linkage and doors for smooth movement.
Do the mode control linkage and doors move smoothly?

YES- Replace the mode control motor.

NO- Repair the mode control linkage or doors.