Code 41 - Crankshaft Position Sensor Signal

NOTE: See appropriate wiring diagram in WIRING DIAGRAMS article for terminal and connector identification.

NOTE: Test number refers to number on diagnostic chart.

1. Inspecting Crankshaft Position (CKP) sensor circuit:
   • Disconnect CKP sensor and ECM connectors.
   • Turn ignition on.
   • Measure CKP sensor voltage and resistance values. See CKP SENSOR SPECIFICATIONS table.
   • If values are not within specification, repair or replace appropriate harness or connector.
   • Reconnect CKP and ECM connectors.

CKP SENSOR SPECIFICATIONS

Between Terminals (1)	Resistance	Voltage
20 & Black/White	0	N/A
7 & Green/Yellow	0	N/A
Green/Black & Ground	0	10-14
Black & Ground	0	N/A
(1) Circuit numbers refer to ECM terminal numbers, and wire colors refer to CKP sensor wire colors at connector.

Fig 1: Code 41 - Diagnostic Flowchart

Courtesy of ISUZU MOTOR CO.