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Home >> Toyota >> 2022 >> 4Runner TRD Pro >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Transfer Case (VF4BM) - Diagnostic Codes & Circuit Tests) >> Transfer System >> DTC P163B: 4WD ECU Malfunction [08/2019 - ] >> Description

DTC P163B: 4WD ECU Malfunction [08/2019 - ]: Description

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This DTC is output when a malfunction is detected in the 4 wheel drive control ECU internal circuit.

DTC No. DTC Detection Condition
  1. Diagnosis Condition
  2. Malfunction Status
  3. Malfunction Time
  4. Other
Trouble Area
P163B
  1. While the ignition switch is turned to ON or directly after the ignition switch is turned to ON
  2. 4 wheel drive control ECU internal circuit malfunction
  3. 0.5 seconds or more (if directly after the ignition switch is turned to ON, 0.05 seconds or more)
  4. 1 trip detection logic
  • Wire harness and connector
  • Transfer shift actuator assembly
  • 4 wheel drive control ECU