DTC B257A

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Diagnostic Instructions

  • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

  • Review Strategy Based Diagnosis for an overview of the diagnostic approach.

  • Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descr

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You may preview the service manual table of contents by clicking below.

Service Manual Table of Contents

Document Tags

Document Title: DTC B257A

diagnostic

instructions

system

headlamp

switch

malfunction

information

circuit

short

ground

open

resistance

voltage

signal

park

lamps

description

operation

control

module

auto

position

running

grounded

exterior

conditions

detects

present

beam

ignition

reference

connector

testing

scan

tool

disconnect

harness

test

terminal

greater

repair

verify

parameter

inactive

kbody

infinite

replace

install

fused

jumper

wire

active

short voltage

switch park

lamps signal

switch headlamps

headlamps signal

position headlamp

signal circuit

circuit grounded

present headlamp

beam headlamps

harness connector

ground circuit

circuit terminal

terminal ground

repair open

resistance circuit

verify scan

switch parameter

inactive inactive

inactive ignition

ignition disconnect

connector kbody

kbody control

test infinite

infinite resistance

resistance signal

ground infinite

resistance repair

repair short

resistance replace

replace kbody

module inactive

inactive install

wire signal

parameter active

active active

active ignition

module ignition

voltage circuit

module active

headlamp switch park

switch park lamps

park lamps signal

headlamp switch headlamps

switch headlamps signal

three signal circuits

headlamp switch headlamp

position headlamp switch

headlamps signal circuit

signal circuit grounded

circuit grounded indicating

lamps signal circuit

detects short ground

short ground headlamp

ground headlamp switch

present headlamp switch

control module references

circuit terminal ground

greater repair open

repair open resistance

open resistance circuit

verify scan tool

scan tool automatic

tool automatic headlamps

automatic headlamps disable

headlamps disable switch

disable switch parameter

switch parameter inactive

parameter inactive inactive

inactive inactive ignition

inactive ignition disconnect

harness connector kbody

connector kbody control

kbody control module

test infinite resistance

infinite resistance signal

resistance signal circuit

signal circuit terminal

terminal ground infinite

ground infinite resistance

infinite resistance repair

resistance repair short

repair short ground

short ground circuit

infinite resistance replace

resistance replace kbody

replace kbody control

control module inactive

module inactive install

jumper wire signal

wire signal circuit

switch parameter active

parameter active active

active active ignition

active ignition disconnect

control module ignition

greater repair short

repair short voltage

short voltage circuit

control module active

module active verify

active verify scan

scan tool park

tool park lamps

park lamps switch

lamps switch parameter

scan tool headlamps

tool headlamps switch

headlamps switch parameter