DTC No | Condition | Possible Caese |
C1274 | When the voltage of Gsensor signal is more than 4.5V or less than 0.6V for 250msec continuously. | - Open/short in G-sensor circuit. - Faulty G-sensor - Faulty installing of G-sensor - Faulty HECU |
Only the ABS, TCS(ESP) functions are inhibited. The ABS,TCS(ESP) warning lamps are ON, but the EBD warning lamp OFF.
CHECK SHORT IN CIRCUIT TO BATTERY(+).
Disconnect the connector from the HECU.
Turn the ignition switch ON.
Measure the voltage between terminal 13 of the HECU connector and the body ground.
Is the voltage above 4.5V?
▶ Repair short in the circuit to battery(+) between the G-sensor and the HECU.
▶ Check short in circuit to ground.
CHECK SHORT IN CIRCUIT TO GROUND.
Disconnect the connector from the HECU.
Measure the resistance between terminal 13 of the HECU connector and the body ground.
Is the resistance below 1Ω?
▶ Repair short in the circuit to the body ground between the G-sensor and the HECU.
▶ Check output in HECU connector
CHECK OUTPUT IN HECU CONNECTOR.
Disconnect the connector from the HECU and turn the ignition switch ON.
Measure the voltage between terminals 13(+) and 15(-) of the HECU connector.
Is the voltage within 0.6V ~ 4.5V?
▶ Check the HECU harness or connector.
▶ If necessary, replace the HECU then recheck.
CHECK OUTPUT IN G-SENSOR CONNECTOR.
Turn the ignition switch ON.
Measure the voltage between terminals 2(+) and 3(-) of the G-sensor connector.
Specification: approximately 3.5V
Is the voltage within the specification?
▶ Replace the G-sensor.
▶ Replace the HECU then recheck.
