C1500 - TRANSFER CASE CONTACT PLATE 'B' ENCODER CIRCUIT FAILURE

POST UPDATED IN January, 2023

Description of DTC code C1500 Generic

The transfer case is an essential part of the powertrain system in vehicles with four-wheel drive or all-wheel drive. The function of this component is to transmit the power coming from the transmission to the front and rear axles. It is also responsible for synchronizing the difference between the rotation of the front and rear wheels. Generally, the transfer case has one or more sets of gears through which the power from the transmission is received and sent.

The ABS (Anti-lock Brake System) control module is responsible for monitoring the operation of the transfer case. If the transfer case has an unstable operation, a fault code will be stored, and this code will alert the situation. In the case of the C1500 OBDII code, it is set when a failure occurs in the transfer case encoder circuit.

Symptoms of fault code C1500 Generic

Causes of OBD2 C1500 Generic

The reasons for setting the C1500 OBD2 diagnostic code are:

  • The encoder circuit may have defects in its wires or respective connectors.
  • The electrical connections of the encoder circuit may be deficient.
  • There may be damage to the transfer case.

Possible solutions of the DTC code C1500 Generic

The steps to solve the DTC C1500 OBDII code are as follows:

  • As a first step, we recommend that you consult the TSB (Technical Service Bulletins).
  • Check the cables, connectors, and other components of the electrical circuit of the box board decoder, check them for damage due to burns or corrosion. Make any necessary repairs or replacements.
  • Make voltage checks on the system circuit, and compare these results with those indicated in the service manual. If you detect an out-of-range value during the test, make the necessary corrections.

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