P1590

DTC P1590
Rough road signal implausible Drive cycle A:Signal implausible.

Possible causes by suggested order of priority:
- Connectors C504, ECM C637 (B).
- Open circuit - C637/34 (RG) to C504/4 (RG).
- ABS fault.

Connectors C504, ECM C637 (B).
- Check for connector not correctly latched, backed out pins, damaged pins, corroded pins

Open circuit - C637/34 (RG) to C504/4 (RG).
- Check resistance > 1M Ohm

ABS fault.
CHECK THE FOLLOWING:
- Carry out diagnostic checks on the ABS system.
POSSIBLE FAULTS
- Faulty ABS ECU or wiring.