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STEP 7. Using scan tool MB991958, read the diagnostic (1) Turn the ignition switch to the "ON" position. (2) Read the DTC. (3) Turn the ignition switch to the "LOCK" (OFF) position. Q:Is DTC P1540 or P1541 set? YES: Repeat the troubleshooting. NO: The procedure is complete. DTC P1543: DOR Tampering Monitor (Temperature Check After Thermostat Open) M11310100412USA0000010000 RADIATOR SENSOR CIRCUIT CIRCUIT OPERATION MONITOR EXECUTION ⦆ Once per driving cycle MONITOR EXECUTION CONDITIONS (OTHER Other Monitor (There is no temporary DTC stored in ⦆ Not applicable Sensor (The sensor below is determined to be ⦆ Not applicable MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS> 13Ab-663 DIAGNOSTIC TROUBLE CODE PROCEDURES |