DTC B1194 (Head Up Display): Inspection

+B_BACK_UP, IG1_METER(VST), GND, HUD_UART Circuit Inspection

Test Procedure

Preparation
- Gauge control module connector A (32P): disconnected
- Gauge control module connector B (12P): disconnected
- Head up display connector (20P): disconnected
Procedure
- Perform the inspection according to the following table.


		(Disconnected) Head up display connector (20P) female terminals	(Disconnected) Gauge control module connector B (12P) female terminals
	IG Mode	Courtesy of HONDA, U.S.A., INC.	Courtesy of HONDA, U.S.A., INC.	Normal Conditions
HUD_UART open wire inspection	OFF			There is less than 1 Ohms
Refer to the Open/Shorted Wire Inspection Description for the method to inspect the shorted circuit below, then start to inspect according to circumstances.
HUD_UART shorted to ground Inspection	OFF			There is more than 1 MOhms


		(Disconnected) Gauge control module connector A (32P) female terminals
	IG Mode	Courtesy of HONDA, U.S.A., INC.	Normal Conditions
+B_BACK_UP circuit inspection	OFF		12 V battery voltage [circuit type 1]
IG1_METER(VST) circuit inspection	ON		12 V battery voltage [circuit type 3]

GND open wire inspection

OFF

There is more than 1 MOhms

Results

If abnormal, there is a problem in the circuit.
If the power supply inspection of the above table showed abnormally, do the additional Power Supply Inspection , to locate the failure.

Gauge Control Module Inspection

NOTE: Since there is no direct method to test the inspection item, troubleshooting is performed using a known-good component.

Test Procedure

Results

Head Up Display Inspection

Test Procedure

If the other inspection item(s) indicated a normal condition, then it is determined that the remaining head up display is the cause.

Results