3.
ARE THE WIRES O.K ? & ARE THE CONNECTIONS O.K ?
YES
a.
Go to "Signal Circuit Inspection" procedure
NO
a.
Repair as necessary and go to " Verification of Vehicle Repair " procedure
Check for damaged harness and terminals including rubber seals :
-. contact resistance, oxidation, corrosion, bent or broken terminals
-. harness connector connection, loose wires etc.
Check for poor connection between ECM and component :
-. backed out terminal, improper mating, broken locks and poor terminal to wire connection
ARE THE WIRES O.K ? & ARE THE CONNECTIONS O.K ?
YES
Go to "Signal Circuit Inspection" procedure
NO
Repair as necessary and go to " Verification of Vehicle Repair " procedure
DTCs listed below is stored in the scan tool
P0703
Check items with the scan tool and the multimeter
① Wiring harness inspection
② Check the fuse
③ Check the brake switch
Specification
Resitance : below 1 Ω for open in the wire
Resitance : infinite for short to ground in the wire
Voltage : below 0.5V for short to power in the wire
Battery voltage: Approx. 12V
Refer to the component and full circuit for connector configrations details
Disconnect the brake switch and turn the ignition switch ON, measure the voltage at the brake switch terminal 2 and the brake switch terminal 4 individually.
To be sure the brake switch terminal number, in according to the with or without the cruise control system, go to "Component Inspection" procedure
ARE THERE THE BATTERY VOLTAGE ?
YES
Go to step 4
NO
Go to step 3
ARE THE FUSES BLOWN ?
YES
Repair open or short in the wire between the brake s/w terminal 2 and the fuse No.19 (15A).
Repair open or short in the wire between the brake s/w terminal 4 and the injector fuse (15A).
Replace the fuse if the fuse is broken
Go to step 4
NO
Go to step 4
Connect the scan tool to the data link connector(DLC) and start the engine
Fix the brake switch current data.
Press the brake pedal and check the brake switch the current data
IS THE BRAKE SWITCH ON WITH THE BRAKE LIGHTS ON ?
YES
Go to "Verification of Vehicle Repair" procedure
NO
Repair open or short in the wire between the brake s/w terminal 3 and the ECM terminal 54/C230-1.
Repair open or short in the wire between the brake s/w terminal 1 and the ECM terminal 59/C230-1.
Go to step 8
Press the brake pedal and check the brake switch the current data again ?
IS THE BRAKE SWITCH ON WITH THE BRAKE LIGHTS ON ?
YES
Go to "Verification of Vehicle Repair" procedure
NO
Replace the brake switch for checking the brake s/w, Go to "Component Inspection" procedure
Replace a known - good ECM and recheck. If the brake switch signal ON is displayed, replace the ECM.
