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Defender 90 First Edition
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Repair and Diagnosis
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General Information
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Specifications Index
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Diagnostic Trouble Code Index DTC: Transmission Control Module (TCM) -- Defender/L663
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Diagnostic Trouble Code Index - DTC: Transmission Control Module (TCM) (G3187879)
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Description And Operation
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Transmission Control Module (TCM) - 8HP70/45 Transmissions
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DTC U0121-87: Lost Communication With Anti-Lock Brake System (ABS) Control Module - Missing message
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Possible Causes
Possible Causes
Anti-lock brake system control module power or ground circuit open circuit, high resistance
FlexRay bus circuit short circuit to ground, short circuit to power, open circuit, high resistance
Anti-lock brake system fault