Navigation cannot control HVAC by voice command

WARNING: This page is about a different car, the 2008 Honda Pilot, 2007 Honda Pilot, and 2006 Honda Pilot. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Always check the connectors for poor connections or loose terminals.
Before troubleshooting, get the navigation system anti-theft codes.
After troubleshooting, enter the navigation system anti-theft codes.
Verify that the correct navigation unit is installed for this model. Go into the Diagnostic Menu, and use "Version" (see VERSION ).
Always check for and resolve all CAN DTCs before troubleshooting the navigation system.
Make sure the DVD is not scratched or damaged.
Make sure the correct DVD color and version is installed.

Turn the ignition switch ON (II).
Check the navigation system function.
Does the navigation system function normally all other aspects of operation?

YES - Go to step 3.

NO - Refer to the navigation system symptom troubleshooting. Resolve any other problems and then recheck the system function.
Check the HVAC function.
Does the HVAC system function normally all other aspects of operation?

YES - Go to step 4.

NO - Refer to the HVAC system symptom troubleshooting. Resolve any other problems and then recheck the system function.
Go into the Diagnostic mode and use the Navi System Link diagnostic (see NAVI SYSTEM LINK ).
Is the Air-con icon red?

YES - Go to step 5.

NO - Substitute a known-good climate control units and navigation unit one at a time, in this order. Recheck the system operation after each unit substitution until the problem is resolved, then replace the malfunction unit.
Turn the ignition switch OFF.
Disconnect climate control unit connector A (20P) and navigation unit connector A (20P).
Check for continuity between body ground and the navigation unit connector A (20P) terminals No. 4, No. 14, and No. 15 individually.

Fig 1: Checking For Continuity Between Body Ground And Navigation Unit Connector A (20P) Terminals No. 4, No. 14, And No. 15
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Repair short to body ground in the wire(s) between the navigation unit connector A (20P) and climate control unit connector A (20P).

NO - Go to step 8.
Turn the ignition switch ON (II).
Measure the voltage between body ground and the navigation unit connector A (20P) terminals No. 4, No. 14, and No. 15 individually.

Fig 2: Measuring Voltage Between Body Ground And Navigation Unit Connector A (20P) Terminals No. 4, No. 14, And No. 15
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there 0.2V or more?

YES - Repair short to power in the wire(s) between the navigation unit connector A (20P) and climate control unit connector A (20P).

NO - Go to step 10.
Turn the ignition switch OFF.

Check for continuity between the navigation unit connector A (20P) and the climate control unit connector A (20P) according to the table.

CONNECTOR REFERENCE

Navigation unit connector	Climate control unit connector
A4	A17
A14	A19
A15	A18

Fig 3: Checking For Continuity Between Navigation Unit Connector A (20P) And Climate Control Unit Connector A (20P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Go to step 12.

NO - Repair open in the wire(s) between the navigation unit connector A (20P) and the climate control unit connector A (20P).

Substitute a known-good climate control unit (see CLIMATE CONTROL UNIT REMOVAL AND INSTALLATION ), and recheck.
Does the problem goes away?

YES - Replace the original climate control unit.

NO - Replace the navigation unit (see NAVIGATION UNIT REMOVAL/INSTALLATION ).