AFS ECU Power Source Circuit

LIGHTING SYSTEM: AFS ECU Power Source Circuit

AFS ECU Power Source Circuit

DESCRIPTION

This circuit detects the state of the ignition switch and send it to the AFS ECU.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE
(a) Inspect the ECU-IG No.2 fuse and AM1 fuse in the instrument panel junction block assembly.
Resistance:
Below 1 Ohms
NG -- REPLACE FUSE
OK -- Continue to next step.
2. INSPECT RELAY
(a) Remove the IG1 relay from the instrument panel J/B assembly.





(b) Measure the resistance according to the value(s) in the table below.
Resistance:






NG -- REPLACE RELAY
OK -- Continue to next step.
3. INSPECT AFS ECU





(a) Measure the voltage according to the value(s) in the table below.
Voltage:






NG -- CHECK HARNESS AND CONNECTOR (AFS ECU - BODY GROUND)
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
4. CHECK HARNESS AND CONNECTOR (AFS ECU - BODY GROUND)





(a) Disconnect the A14 connector from headlight swivel ECU assembly.
(b) Measure the resistance according to the value(s) in the table below.
Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. INSPECT INSTRUMENT PANEL J/B ASSEMBLY
(a) Measure the voltage according to the value(s) in the table below.





Voltage:






NG -- INSPECT INSTRUMENT PANEL J/B ASSEMBLY (POWER SOURCE CIRCUIT)
OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL J/B ASSEMBLY - AFS ECU)
6. INSPECT INSTRUMENT PANEL J/B ASSEMBLY (POWER SOURCE CIRCUIT)
(a) Measure the voltage according to the value(s) in the table below.





Voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - INSTRUMENT PANEL J/B ASSEMBLY)
OK -- Continue to next step.
7. INSPECT IGNITION SWITCH





(a) Disconnect the ignition switch connector.
(b) Measure the resistance according to the value(s) in the table below.
Resistance:






NG -- REPLACE IGNITION SWITCH
OK -- Continue to next step.
8. INSPECT INSTRUMENT PANEL J/B ASSEMBLY
(a) Measure the voltage according to the value(s) in the table below.





Voltage:






NG -- REPLACE INSTRUMENT PANEL J/B ASSEMBLY
OK -- Continue to next step.
9. INSPECT INSTRUMENT PANEL J/B ASSEMBLY
(a) Measure the voltage according to the value(s) in the table below.





Voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
10. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL J/B ASSEMBLY - BODY GROUND)
(a) Disconnect the 1F connector from the instrument panel junction block assembly.
(b) Measure the resistance according to the value(s) in the table below.





Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE INSTRUMENT PANEL J/B ASSEMBLY