Symptom Related Diagnostic Procedures
METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: head-up Display Malfunction
- head-up Display Malfunction
DESCRIPTION
This circuit is the power source circuit for the head-up display (combination meter mirror ECU). This circuit provides two types of power sources; one is a constant power source mainly used as a backup power source, and the other is a power source mainly used for signal transmission.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT
Before starting the following inspection, confirm the head-up display (combination meter mirror ECU) position and illuminance, then perform the on-vehicle inspection On-Vehicle Inspection.
PROCEDURE
1. SYSTEM CHECK
(a) Check the symptom of the head-up display (combination meter mirror ECU).
Result:
B -- SYSTEM CHECK
A -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (HEAD-UP DISPLAY CIRCUIT)
(a) Disconnect the F118 connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
(c) Measure the resistance according to the value(s) in the table below
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (HEAD-UP DISPLAY - HEAD-UP DISPLAY SWITCH ASSEMBLY)
(a) Disconnect the F117 and F118 connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. INSPECT HEAD-UP DISPLAY SWITCH ASSEMBLY
(a) Disconnect the F117 connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPLACE HEAD-UP DISPLAY SWITCH ASSEMBLY Removal
OK -- REPLACE HEAD-UP DISPLAY (COMBINATION METER MIRROR ECU) Removal
5. SYSTEM CHECK
(a) Check the symptom of the head-up display (combination meter mirror ECU).
Result:
B -- CONFIRM DTC OUTPUT
A -- Continue to next step.
6. CONFIRM DTC OUTPUT
(a) Check for DTCs On-Vehicle Inspection.
Result:
B -- REPLACE HEAD-UP DISPLAY (COMBINATION METER MIRROR ECU)
A -- Continue to next step.
7. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - HEAD-UP DISPLAY)
(a) Disconnect the F4 and F118 connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
8. REPLACE HEAD-UP DISPLAY (COMBINATION METER MIRROR ECU)
(a) Replace the head-up display (combination meter mirror ECU) with a new or a known good one Removal.
OK:
The operation of the head-up display (combination meter mirror ECU) returns to normal.
NG -- REPLACE COMBINATION METER ASSEMBLY Removal
OK -- END
9. CONFIRM DTC OUTPUT
(a) Check for DTCs On-Vehicle Inspection.
Result:
B -- REPLACE COMBINATION METER ASSEMBLY
A -- Continue to next step.
10. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - HEAD-UP DISPLAY)
(a) Disconnect the F4 and F118 connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
11. REPLACE COMBINATION METER ASSEMBLY
(a) Replace the combination meter assembly with a new or a known good one Removal.
OK:
The operation of the head-up display (combination meter mirror ECU) returns to normal.
NG -- REPLACE HEAD-UP DISPLAY (COMBINATION METER MIRROR ECU)
OK -- END
12. REPLACE HEAD-UP DISPLAY (COMBINATION METER MIRROR ECU)
(a) Replace the head-up display (combination meter mirror ECU) with a new or a known good one Removal.
OK:
The operation of the head-up display (combination meter mirror ECU) returns to normal.
NG -- REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Removal
OK -- END