Stop Light Does Not Illuminate

LIGHTING (EXT): LIGHTING SYSTEM: Stop Light does not Illuminate

Stop Light does not Illuminate

DESCRIPTION

When the stop light switch is turned on, current flows to the stop lights to illuminate them.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH)
(a) Using the Techstream, read the Data List.

Main Body

OK:
On the Techstream screen, each item changes between ON and OFF according to above chart.
NG -- INSPECT STOP LIGHT SWITCH
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (STOP LIGHT CONTROL RELAY - BATTERY AND BODY GROUND)

(a) Disconnect the A39 stop light relay connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (STOP LIGHT CONTROL RELAY - STOP LIGHT SWITCH)

(a) Disconnect the A30 stop light switch connector.
(b) Disconnect the A39 relay connector.
(c) 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 BRAKE LIGHT RELAY (BRK LP)

(a) Remove the brake light relay from the engine room relay block.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:

NG -- REPLACE BRAKE LIGHT RELAY
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (STOP LIGHT CONTROL RELAY - BRAKE LIGHT RELAY)

(a) Remove the brake light relay from the engine room relay block.
(b) Disconnect the A39 stop light control relay connector.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:

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.
6. CHECK HARNESS AND CONNECTOR (BRAKE LIGHT RELAY - STOP LIGHT AND BODY GROUND)

(a) Remove the brake light relay from the engine room relay block.
(b) Rear Combination Light:
(1) Disconnect the K4 and L3 light connectors.
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:

for LH

for RH

(c) High Mount Stop Light:
(1) Disconnect the S4 light connector.
(2) 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.
7. CHECK HARNESS AND CONNECTOR (BRAKE LIGHT RELAY - BATTERY)

(a) Remove the brake light relay from the engine room relay block.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
8. CHECK HARNESS AND CONNECTOR (BRAKE LIGHT RELAY - SKID CONTROL ECU)

(a) Remove the brake light relay from the engine room relay block.
(b) Disconnect the A24 ECU connector.
(c) 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.
9. CHECK STOP LIGHT CONTROL RELAY
(a) Temporarily replace the stop light control relay with a new or normally functioning one Testing and Inspection.
(b) Check the stop light operation.
OK:
Stop light operation is normal.
NG -- REPLACE MASTER CYLINDER SOLENOID (SKID CONTROL ECU)
OK -- REPLACE STOP LIGHT CONTROL RELAY
10. INSPECT STOP LIGHT SWITCH

(a) Remove the stop light switch Component Tests and General Diagnostics.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:

NG -- REPLACE STOP LIGHT SWITCH
OK -- Continue to next step.
11. CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH - BATTERY)

(a) Disconnect the A30 stop light switch connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
12. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - STOP LIGHT SWITCH)

(a) Disconnect the A30 stop light switch connector.
(b) Disconnect the 2B ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MAIN BODY ECU