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No Response From TCM (Powertrain Control Module) - NGC: Notes

WARNING: This page is about a different car, the 2009 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: PCM - NGC Circuit Schematic
GC0120707Courtesy of CHRYSLER LLC

For complete wiring diagrams, refer to SYSTEM WIRING DIAGRAMS .

Possible Causes 
(A209) FUSED B(+) CIRCUIT OPEN OR SHORTED
(Z903) GROUND CIRCUIT OPEN
(F942) (F26) FUSED IGNITION SW OUTPUT CIRCUIT OPEN OR SHORTED
(D65) CAN C BUS (+) CIRCUIT OPEN
(D64) CAN C BUS (-) CIRCUIT OPEN
POWERTRAIN CONTROL MODULE (PCM)