NO.8 SPEECH RECOGNITION DOES NOT START [CAR-NAVIGATION SYSTEM]

id0903e8812500

8

Speech recognition does not start.

POSSIBLE CAUSE

•  Poor connection of car-navigation unit connector, terminal damage

•  Open or short circuit in wiring harness between microphone and car-navigation unit.

•  Microphone unit malfunction

•  Car-navigation unit malfunction

8	Speech recognition does not start.
POSSIBLE CAUSE	• Poor connection of car-navigation unit connector, terminal damage • Open or short circuit in wiring harness between microphone and car-navigation unit. • Microphone unit malfunction • Car-navigation unit malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	• Turn the ignition switch to the ACC position. • Start the car-navigation. • Display the map screen. • Press the voice recognition/hands-free switch (with RDS (radio data system)) or Voice switch (without RDS (radio data system). (at audio control switch) • Is the speech recognition icon displayed on the screen upper left?	Yes	Go to the next step.
1		No	Go to Step 4.
2	• Start diagnostic function and indicate “Microphone Check” screen. (See DIAGNOSTIC CHECK [CAR-NAVIGATION SYSTEM].) • Speak greatly toward a microphone. • Inspect the “Microphone input level judging”. • Is a judging “OK” (green display)?	Yes	The system is normal. Caution • Sound may not be recognized by the influence of the following. ― Speaker’s utterance method ― Road noise ― Other noises
2		No	Replace the microphone, then go to the next step.
3	• Does the fault phenomenon improve?	Yes	Troubleshooting is completed.
3	• Does the fault phenomenon improve?	No	Replace the car-navigation unit. (See CENTER PANEL UNIT REMOVAL/INSTALLATION.) (See CENTER PANEL UNIT REMOVAL/INSTALLATION.)
4	• Start diagnostic function and indicate “Vehicle Signal” check screen. (See DIAGNOSTIC CHECK [CAR-NAVIGATION SYSTEM].) • Inspect the display of “Microphone” in vehicle signal screen. • Is it display “OK”?	Yes	Go to the next step.
4		No	Go to Step 6.
5	• Turn on the audio function (RADIO or CD). • Press the voice recognition/hands-free switch (at audio control switch). • Does it mute?	Yes	Replace the car-navigation unit. (See CENTER PANEL UNIT REMOVAL/INSTALLATION.) (See CENTER PANEL UNIT REMOVAL/INSTALLATION.)
5		No	Audio control switch related part malfunction. Go to the audio system troubleshooting.
6	• Turn the ignition switch to the LOCK position. • Remove the microphone. • Inspect the connection of the microphone connector (6-pin). • Is the connector securely connected?	Yes	Go to the next step.
6		No	Securely connect the microphone connector.
7	• Disconnect the microphone connector (6-pin). • Inspect both microphone connector and wiring harness-side connector for poor connection (such as damaged/pulled out pins, corrosion). • Are all the pins normal?	Yes	Go to the next step.
7		No	If the microphone connector is wrong: • Replace the car-navigation unit. (See MICROPHONE REMOVAL/INSTALLATION.) If the wiring harness-side connector is wrong: • Repair or replace the pins and/or the connector.
8	• Remove the car-navigation unit. (See CENTER PANEL UNIT REMOVAL/INSTALLATION.) (See CENTER PANEL UNIT DISASSEMBLY/ASSEMBLY.) • Inspect the connection of the car-navigation unit connector (6-pin). • Is the connector securely connected?	Yes	Go to the next step.
8		No	Securely connect the car-navigation unit connector.
9	• Disconnect the car-navigation unit connector (6-pin). • Inspect both car-navigation unit connector and wiring harness-side connector for poor connection (such as damaged/pulled out pins, corrosion). • Are all pins normal?	Yes	With hands-free telephone (HF/TEL) system • Go to the next step. Without hands-free telephone (HF/TEL) system • Go to the step 12.
9		No	If the car-navigation unit connector is wrong: • Replace the car-navigation unit. (See CENTER PANEL UNIT REMOVAL/INSTALLATION.) (See CENTER PANEL UNIT REMOVAL/INSTALLATION.) If the wiring harness-side connector is wrong: • Repair or replace the pins and/or the connector.
10	• Inspect the following wiring harness between the microphone and HF/TEL unit. ― Terminal A(6-pin, MIC+) — Terminal B (24-pin, MIC+) ― Terminal B (6-pin, MIC-) — Terminal D (24-pin, MIC-) ― Terminal C (6-pin, MIC B+) — Terminal U (24-pin, MIC B+) ― Terminal D (6-pin, GND) — Terminal F (24-pin, MIC GND) ― Terminal E (L.H.D)/terminal F (R.H.D) (6-pin, MIC SENSE)— Terminal J (24-pin, MIC SENSE) • Is there open or short circuit?	Yes	Repair or replace suspected wiring harness.
10		No	Go to the next step.
11	• Inspect the following wiring harness between the HF/TEL unit and car-navigation unit. ― Terminal A (24-pin, MIC+) — Terminal 3A (6-pin, MIC+) ― Terminal C (24-pin, MIC-) — Terminal 3B (6-pin, MIC-) ― Terminal U (24-pin, MIC B+) — Terminal 3C (6-pin, MIC B+) ― Terminal E (24-pin, MIC SHIELD) — Terminal 3D (6-pin, GND) ― Terminal J (24-pin, MIC SENSE) — Terminal 3E (6-pin, MIC SENSE) • Is there open or short circuit?	Yes	Repair or replace suspected wiring harness.
11		No	Replace the microphone. (See MICROPHONE REMOVAL/INSTALLATION.) Then go to the step 13.
12	• Inspect the following wiring harness between the microphone and car-navigation unit. ― Terminal A(6-pin, MIC+) — Terminal 3A (6-pin, MIC+) ― Terminal B (6-pin, MIC-) — Terminal 3B (6-pin, MIC-) ― Terminal C (6-pin, MIC B+) — Terminal 3C (6-pin, MIC B+) ― Terminal D (6-pin, GND) — Terminal 3D (6-pin, MIC GND) ― Terminal E (L.H.D)/terminal F (R.H.D) (6-pin, MIC SENSE)— Terminal 3E (6-pin, MIC SENSE) • Is there open or short circuit?	Yes	Repair or replace suspected wiring harness.
12		No	Replace the microphone. (See MICROPHONE REMOVAL/INSTALLATION.) Then go to the next step.
13	• Does the fault phenomenon improve?	Yes	Troubleshooting is completed.
13	• Does the fault phenomenon improve?	No	Replace the car-navigation unit. (See CENTER PANEL UNIT REMOVAL/INSTALLATION.) (See CENTER PANEL UNIT REMOVAL/INSTALLATION.)