NO.3 EVEN WHEN HEADLIGHT SWITCH IS TURNED ON, DAYTIME SCREEN DOES NOT CHANGE TO NIGHT TIME SCREEN. (FRONT AND REAR COMBINATION LIGHTS OPERATE NORMALLY.)

BME090366900W04

3

Even when headlight switch is turned on, daytime screen does not change to night time screen. (Front and rear combination lights operate normally.)

TROUBLESHOOTING HINTS

• Malfunction in TNS (+) signal line of car-navigation unit
- Car-navigation unit malfunction
- Malfunction in wiring harness between car navigation unit and TNS relay

Diagnostic procedure

STEP

INSPECTION

ACTION

1*
• Turn headlight switch on.
• Measure voltage at the following terminal of car-navigation unit connector (24-pin):
- Terminal 1E (TNS (+) signal)
• Is voltage 10 V or more?
Yes
Replace car navigation unit (available at Clarion service center) or get it repaired at Clarion service center, then go to next step.
No
Repair wiring harness between car navigation unit and TNS relay, then go to next step.
2
• When headlight switch is turned on, does daytime screen change to night time screen?
Yes
Complete troubleshooting, then explain repairs to customer.
No
Recheck malfunction symptoms, then repeat from Step 1 if malfunction recurs.