Navistar International DT 466 Diagnostic/Troubleshooting Manual page 358

354 7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS
Harness Resistance Check (Check with breakout box connected to engine harness only. Check from ECM
to sensor harness connector.)
X1–1 to 2
X1–2 to 1
1
Connector 9260 is a 2-wire connector usually located in the battery box. Pin A is the chassis ground connection for
the ECM and IDM. Refer to truck Chassis Electrical Circuit Diagram Manual for complete chassis side ECM and IDM
ground circuit information.
Operational Checks for CKP Sensor (Check with breakout box connected to ECM and engine harness.)
Test Point
X1–1 to X1–6
NOTE: If the tachometer or MasterDiagnostics® display no rpm signal, but both indicate CMP and CKP sensor
activity, check the engine static timing.
CKP Diagnostic Trouble Codes
DTC 146 = CKP signal inactive (CMP signal active and ICP increased)
DTC 147 = Incorrect CKP signal signature
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
< 5 Ω If > 5 Ω, check for open circuit.
< 5 Ω If > 5 Ω, check for open circuit.
Engine Cranking Low Idle
130 Hz - 225 Hz @ 650–700 Hz @
130–225 rpm 700 rpm
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
High Idle
2.80 kHZ - 3.00
kHz @ 2950 rpm
EGES-270-1
Comment
Set DMM to
DCmV-Hz