The main body ECU receives headlight dimmer switch information signals and illuminates the clearance lights, taillights and license plate lights.
Inspect the fuses and bulbs for circuits related to this system before performing the following inspection procedure.
PERFORM ACTIVE TEST USING INTELLIGENT TESTER (TAILLIGHT RELAY)
Using the intelligent tester, perform the Active Test Click here.
|Tester Display||Test Part||Control Range||Diagnostic Note|
|Taillight Relay||Taillight relay||ON/OFF||-|
|Taillight relay operates (taillights illuminate).|
CHECK HARNESS AND CONNECTOR (BATTERY - MAIN BODY ECU) Click here
CHECK HARNESS AND CONNECTOR (BATTERY - MAIN BODY ECU)
Front view of wire harness connector
(to Main Body ECU)
Remove the main body ECU Click here.
Measure the voltage according to the value(s) in the table below.
REPAIR OR REPLACE HARNESS OR CONNECTOR
INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY
Remove the driver side junction block assembly Click here.
Remove the main body ECU from the driver side junction block assembly Click here.
Measure the resistance according to the value(s) in the table below.
REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY