Component Tests and General Diagnostics
LIGHTING: LIGHTING SYSTEM: Taillight Circuit
Taillight Circuit
DESCRIPTION
When the light control switch, located on the headlight dimmer switch, is turned to the TAIL position, the front parking lights, front side marker lights, rear taillights and license plate light illuminate.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. CHECK WHETHER LIGHTS ILLUMINATE
(a) Check whether the following lights illuminate: Front parking light, Front side marker lights, Rear taillights and License plate light.
Result:
E -- INSPECT BULB (LICENSE PLATE LIGHT BULB)
D -- INSPECT BULB (REAR TAILLIGHT BULB)
C -- INSPECT BULB (FRONT SIDE MARKER LIGHT)
B -- INSPECT BULB (FRONT PARKING LIGHT BULB)
A -- Continue to next step.
2. INSPECT FUSE (TAIL)
(a) Remove the TAIL fuse from the main body ECU.
(b) Measure the resistance according to the value (s) in the table below.
Standard resistance:
(c) Reinstall the TAIL fuse.
NG -- REPLACE FUSE
OK -- Continue to next step.
3. INSPECT HEADLIGHT DIMMER SWITCH (LIGHT CONTROL SWITCH)
(a) Remove the headlight dimmer switch assembly.
(b) Inspect the light control switch.
(c) Measure the resistance according to the value (s) in the table below.
Standard resistance:
(d) Reinstall the headlight dimmer switch.
NG -- REPLACE HEADLIGHT DIMMER SWITCH
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (HEADLIGHT DIMMER SWITCH - MAIN BODY ECU, BODY GROUND)
(a) Disconnect the C11 headlight dimmer switch connector.
(b) Disconnect the 2S main body ECU connector.
(c) Measure the resistance according to the value (s) in the table below.
Standard resistance:
(d) Reconnect the main body ECU connector.
(e) Reconnect the headlight dimmer switch connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (BATTERY - MAIN BODY ECU)
(a) Disconnect the 2G main body ECU connector.
(b) Measure the voltage according to the value (s) in the table below.
Standard voltage:
(c) Reconnect the main body ECU connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MAIN BODY ECU
6. INSPECT BULB (FRONT PARKING LIGHT BULB)
(a) Remove the front parking lights
(b) Apply battery voltage to the terminals and check that the front parking light illuminates.
OK:
(c) Reinstall the front parking lights.
NG -- REPLACE BULB
OK -- Continue to next step.
7. CHECK HARNESS AND CONNECTOR (FRONT PARKING LIGHT - MAIN BODY ECU, BODY GROUND)
(a) Disconnect the A6 and A12 front parking light connectors.
(b) Disconnect the 2B main body ECU connector.
(c) Measure the resistance according to the value (s) in the table below.
Standard resistance:
(d) Reconnect the front parking light connectors.
(e) Reconnect the main body ECU connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MAIN BODY ECU
8. INSPECT BULB (FRONT SIDE MARKER LIGHT)
(a) Remove the front side marker lights
(b) Apply battery voltage to the terminals and check that the front side marker light illuminates.
OK:
(c) Reinstall the front side marker lights.
NG -- REPLACE BULB
OK -- Continue to next step.
9. CHECK HARNESS AND CONNECTOR (FRONT SIDE MARKER LIGHT - MAIN BODY ECU)
(a) Disconnect the A5 and A21 front side marker light connectors.
(b) Disconnect the 2B main body ECU connector.
(c) Measure the resistance according to the value (s) in the table below.
Standard resistance:
(d) Reconnect the front side marker light connectors.
(e) Reconnect the main body ECU connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MAIN BODY ECU
10. INSPECT BULB (REAR TAILLIGHT BULB)
(a) Remove the rear combination light assembly.
(b) Apply battery voltage to the terminals and check that the taillight illuminates.
OK:
(c) Reinstall the rear combination light assembly.
NG -- REPLACE BULB
OK -- Continue to next step.
11. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT - MAIN BODY ECU, BODY GROUND)
(a) Disconnect the H5 and H6 rear combination light assembly connectors.
(b) Disconnect the 2A main body ECU connector.
(c) Measure the resistance according to the value (s) in the table below.
Standard resistance:
(d) Reconnect the rear combination light assembly connectors.
(e) Reconnect the main body ECU connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MAIN BODY ECU
12. INSPECT BULB (LICENSE PLATE LIGHT BULB)
(a) Remove the license plate light assembly.
(b) Apply battery voltage to the terminals and check that the license plate light illuminates.
OK:
(c) Reinstall the license plate light assembly.
NG -- REPLACE BULB
OK -- Continue to next step.
13. CHECK HARNESS AND CONNECTOR (LICENSE PLATE LIGHT - MAIN BODY ECU, BODY GROUND)
(a) Disconnect the L5 and L6 license plate light assembly connectors.
(b) Disconnect the 2A main body ECU connector.
(c) Measure the resistance according to the value (s) in the table below.
Standard resistance:
(d) Reconnect the license plate light assembly connector.
(e) Reconnect the main body ECU connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MAIN BODY ECU