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DRIVEABILITY - DIESEL
Symptom List:
P0703-BRAKE SWITCH SIGNAL CIRCUITS PLAUSIBILITY WITH
REDUNDANT CONTACT
P0703-BRAKE SWITCH SIGNAL CKTS PLAUS W/REDUNDANT
CONTACT AFTER INITIALIZATION
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P0703-BRAKE SWITCH SIGNAL
CIRCUITS PLAUSIBILITY WITH REDUNDANT CONTACT.
When Monitored and Set Condition:
P0703-BRAKE SWITCH SIGNAL CIRCUITS PLAUSIBILITY WITH REDUNDANT
CONTACT
When Monitored: With the ignition on.
Set Condition: The ECM detects the Primary Brake Switch Signal circuit and Secondary
Brake Switch Signal circuit inputs to the ECM do not agree.
P0703-BRAKE SWITCH SIGNAL CKTS PLAUS W/REDUNDANT CONTACT AF-
TER INITIALIZATION
When Monitored: With the ignition on.
Set Condition: The ECM detects the Primary Brake Switch Signal circuit and Secondary
Brake Switch Signal circuit inputs to the ECM do not agree.
INTERMITTENT CONDITION
BRAKE LAMP SWITCH - SECONDARY OPEN
BRAKE LAMP SWITCH FUSED B+ CIRCUIT OPEN
SECONDARY BRAKE SWITCH SIGNAL CIRCUIT SHORTED TO GROUND
BRAKE LAMP SWITCH - PRIMARY OPEN
SECONDARY BRAKE SWITCH GROUND CIRCUIT OPEN
SECONDARY BRAKE SWITCH SIGNAL CIRCUIT OPEN
PRIMARY BRAKE SWITCH SIGNAL CIRCUIT SHORTED TO VOLTAGE
PRIMARY BRAKE SWITCH SIGNAL CIRCUIT OPEN
ENGINE CONTROL MODULE - INTERNAL
ENGINE CONTROL MODULE - PRIMARY BRAKE SIGNAL
ENGINE CONTROL MODULE - SECONDARY BRAKE SIGNAL
POSSIBLE CAUSES
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