P1538

DTC 1535
A/C Compressor request plausibility fault Drive cycle A:Signal implausible.
DTC 1536
no additional description given (except as shown on image).
DTC 1537
no additional description given (except as shown on image).
DTC 1538
no additional description given (except as shown on image).

Possible causes by suggested order of priority:
^ Connectors C793, ECM C637 (B).
^ Open circuit - C637/38 (PW) to C793/12 (PB).
^ Short circuit C637/38 (PW) to vehicle earth.

Connectors C793, ECM C637 (B).
CONNECTOR
^ Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.

Open Circuit - C637/38 (PW) to C793/12 (PB).
OPEN_CIRCUIT
^ Check resistance > 1M Ohm

Short Circuit C637/38 (PW) to Vehicle Earth.
SHORT_CIRCUIT
^ Check resistance < 5.0 ohms