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Home >> Jeep >> 2006 >> Commander Base, 3.7 K, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 201 (DRIVEABILITY - Diesel - Non-DTC-Based Diagnostics) >> Diagnosis and Testing >> Checking The ECM Power And Ground Circuits >> Notes

Checking The ECM Power And Ground Circuits: 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: ECM Power And Ground Circuits Schematic
GC0119997Courtesy of CHRYSLER LLC
Possible Causes 
ASD RELAY CONTROL CIRCUIT OPEN
ASD RELAY OUTPUT CIRCUIT(S) OPEN
CHECKING THE ASD RELAY SYSTEM
ECM GROUND CIRCUIT(S) OPEN
FUSED ASD RELAY BATTERY SUPPLY CIRCUIT OPEN
FUSED IGNITION SWITCH (START) OUTPUT CIRCUIT OPEN
FUSED IGNITION SWITCH (START/RUN) OUTPUT CIRCUIT OPEN
SUBSTITUTE ASD RELAY
ASD RELAY CONTROL CIRCUIT SHORTED TO VOLTAGE