DESCRIPTION
While torque sensor system, motor system or ECU system malfunctions are detected, the fail-safe function suspends power assist. However, power assist continues with limited assistance amount if only C1533 or C1534 is output.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Return-to-normal Condition | Note |
---|---|---|---|---|---|---|
C1511 | Torque Sensor1 | Torque sensor malfunction | Rack and pinion power steering gear assembly | EPS warning light: Comes on | Engine switch on (IG) again | - |
C1512 | Torque Sensor2 | Torque sensor malfunction | Rack and pinion power steering gear assembly | EPS warning light: Comes on | Engine switch on (IG) again | - |
C1513 | Torque Sensor Deviation Excessive | Torque sensor malfunction | Rack and pinion power steering gear assembly | EPS warning light: Comes on | Engine switch on (IG) again | - |
C1514 | Torque Sensor Power Supply Voltage | Torque sensor malfunction | Rack and pinion power steering gear assembly | EPS warning light: Comes on | Engine switch on (IG) again | - |
C1521 | Short in Motor Circuit | Motor overcurrent | Rack and pinion power steering gear assembly | EPS warning light: Comes on | Engine switch on (IG) again | - |
C1522 | Power Supply Sensor | Motor current sensor malfunction | Rack and pinion power steering gear assembly | EPS warning light: Comes on | Engine switch on (IG) again | - |
C1523 | Current Deviation Excessive | Excessively large current deviation | Rack and pinion power steering gear assembly | EPS warning light: Comes on | Engine switch on (IG) again | - |
C1528 | Motor Rotation Angle Sensor | Motor rotation angle sensor malfunction | Rack and pinion power steering gear assembly | EPS warning light: Comes on | Engine switch on (IG) again | - |
C1531 | ECU Malfunction | ECU internal malfunction (CPU malfunction) | Rack and pinion power steering gear assembly | EPS warning light: Comes on | Engine switch on (IG) again | - |
C1532 | ECU Malfunction | ECU internal malfunction (Peripheral circuit malfunction) | Rack and pinion power steering gear assembly | EPS warning light: Comes on | Engine switch on (IG) again | - |
C1533 | Temperature Sensor Circuit is Low or High | ECU internal malfunction (Substrate temperature sensor malfunction) | Rack and pinion power steering gear assembly | EPS warning light: Comes on | The ECU judges the system has returned to normal | - |
C1534 | EEPROM | ECU internal malfunction (EEPROM error) | Rack and pinion power steering gear assembly | EPS warning light: Comes on | Engine switch on (IG) again | - |
C1555 | Motor Relay Welding Failure | Motor relay circuit malfunction | Rack and pinion power steering gear assembly | EPS warning light: Comes on | Engine switch on (IG) again | - |
CAUTION / NOTICE / HINT
NOTICE:
If the rack and pinion power steering gear assembly has been replaced, perform assist map writing and torque sensor zero point calibration.
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PROCEDURE
1. | CHECK FOR DTC |
(a) Clear the DTCs.
Chassis > EMPS > Clear DTCs(b) Check for DTCs.
Chassis > EMPS > Trouble Codes Result | Proceed to |
---|---|
DTCs other than C1511, C1512, C1513, C1514, C1521, C1522, C1523, C1528, C1531, C1532, C1533, C1534 or C1555 are not output. | A |
DTCs other than C1511, C1512, C1513, C1514, C1521, C1522, C1523, C1528, C1531, C1532, C1533, C1534 or C1555 are output. | B |
DTCs are not output. | C |
A | REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY |
B | GO TO DIAGNOSTIC TROUBLE CODE CHART |
C | USE SIMULATION METHOD TO CHECK |