DTC
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Diagnostic Trouble Code Storage Condition
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C1508
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Internal Motor Circuit Malfunction
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- Engine starting
- The voltage in the motor circuit is implausible.
Effect:
- The system function is not affected.
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Concerned Terminals: -
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Remedy:
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C1512
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Temperature Sensor Short Circuit
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- The ascertained Control Unit temperature is out of range.
- Above condition must be fulfilled for at least 0.1 s .
Effect:
- The steering boost is switched off.
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Concerned Terminals: -
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Remedy:
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C1512
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Temperature Sensor Open Circuit
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- The ascertained Control Unit temperature is out of range.
- Above condition must be fulfilled for at least 0.1 s .
Effect:
- The system function is not affected.
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Concerned Terminals: -
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Remedy:
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C1517
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Overheat Protection Mode Active
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- Ignition ON
- The internal Control Unit temperature is for at least 0.1 s greater than 122 °C (252 °F).
or
- Engine running
- The internal Control Unit temperature is for at least 0.1 s greater than 130 °C (266 °F).
Effect:
- The steering boost is switched off.
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Concerned Terminals: -
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Remedy:
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C1523
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Battery Voltage High
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- The voltage at the control unit input (terminal RD ) is greater than 16 V .
- Above condition must be fulfilled for at least 0.1 s .
Effect:
- The steering boost is decreased step-wise.
Recovery Condition:
The trouble code is deleted, after the system was switched on 60 times and there was no fault recognised.
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Concerned Terminals: 1 (X12), RD, BN
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Remedy:
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C1523
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Battery Voltage Low
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- The voltage at the control unit input (terminal RD ) is less than 9 V .
- Above condition must be fulfilled for at least 0.3 s .
Effect:
- The steering boost is decreased step-wise.
Recovery Condition:
The trouble code is deleted, after the system was switched on 60 times and there was no fault recognised.
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Concerned Terminals: 1 (X12), RD, BN
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Remedy:
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C1525
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Engine Running Signal (D+) Intermittent
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- Engine running
- Intermittent problems to control unit terminal 5 (X12)
- Above condition must be fulfilled for at least 0.1 s .
Effect:
- The steering boost is increased step-wise.
Recovery Condition:
The trouble code is deleted, after the system was switched on 1 times and there was no fault recognised.
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Concerned Terminals: 5 (X12)
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Remedy:
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C1525
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Engine Running Signal (D+) No Signal
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- Engine running
- Short to ground or interruption in circuit to control unit terminal 5 (X12)
- Above conditions must be fulfilled for at least 0.1 s .
Effect:
- The steering boost is decreased step-wise.
Recovery Condition:
The trouble code is deleted, after the system was switched on 1 times and there was no fault recognised.
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Concerned Terminals: 5 (X12)
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Remedy:
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C1526
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Motor Lock Protection Active
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- Control unit temperature is greater than 63 °C (145 °F)
- Actual motor current is greater than 20 A
- Engine speed is less than 100 rpm
Effect:
- The current is limited to 20 A .
Recovery Condition:
The trouble code is deleted, after the system was switched on 60 times and there was no fault recognised.
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Concerned Terminals: -
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Remedy:
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C1527
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Motor High Current
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- Ignition ON
- Engine running
- Actual motor current is greater than 75 A
- Above condition must be fulfilled for at least 1 s .
Effect:
- The steering boost is switched off.
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Concerned Terminals: -
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Remedy:
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C1528
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Motor Speed Invalid Signal
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- Sensor signal is out of range
- Above condition must be fulfilled for at least 0.2 s .
Effect:
- The system function is not affected.
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Concerned Terminals: -
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Remedy:
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C1529
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Motor Low Current
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- Engine starting
- Actual motor current is less than 11 A
Effect:
- The system function is not affected.
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Concerned Terminals: -
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Remedy:
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C1530
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Battery Voltage Range/Performance
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- The voltage measurement results an implausible value.
- Above condition must be fulfilled for at least 0.1 s .
Effect:
- The system function is not affected.
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Concerned Terminals: -
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Remedy:
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C1550
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Replace Electronic Control Unit (ECU)
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- Control unit software/hardware failure
- Above condition must be fulfilled for at least 0 s .
Effect:
- The steering boost is switched off.
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Concerned Terminals: -
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Remedy:
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C1550
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Replace Electronic Control Unit (ECU) - EEPROM Failure
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- Control unit software/hardware failure
- Above condition must be fulfilled for at least 0 s .
Effect:
- No steering boost function
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Concerned Terminals: -
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Remedy:
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C1550
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Electronic Control Unit (ECU) Internal Fault
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- Control unit software/hardware failure
- Above condition must be fulfilled for at least 0 s .
Effect:
- The steering boost is switched off.
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Concerned Terminals: -
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Remedy:
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C1550
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Electronic Control Unit (ECU) Internal Fault
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- Engine starting
- Control unit software/hardware failure
- Above condition must be fulfilled for at least 0 s .
Effect:
- The system function is not affected.
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Concerned Terminals: -
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Remedy:
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C1550
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Electronic Control Unit (ECU) Fault - Random Access Memory (RAM)
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- Engine starting
- Control unit software/hardware failure
- Above condition must be fulfilled for at least 0 s .
Effect:
- The system function is not affected.
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Concerned Terminals: -
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Remedy:
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