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Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe™ Online for applicable fixes to the calibration stored in the ECM. If necessary, calibrate the ECM. The turbocharger inlet air temperature sensor shares return wires in the engine harness with other sensors. An open return can cause multiple fault codes to be active. Before troubleshooting Fault Code 691, check for multiple fault codes. An extension harness between the main engine harness and the turbocharger compressor inlet temperature sensor can be used depending on the turbocharger arrangement. On ISB with CM2150 engines, an extension...

Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM. An extension harness between the main engine harness and the turbocharger compressor inlet temperature sensor can be used, depending on the turbocharger arrangement. On ISB with CM2150 engines, an extension harness between the main harness and the ambient air temperature/pressure sensor is always used. Possible causes: 1)Signal circuit shorted to ground in the harness2)Signal circuit shorted to return or ground in the sensor3)Damaged sensor. Possible repairs: 1)Replace...

Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM. This sensor is located internally to the ECM. No troubleshooting is possible for this fault code. If the fault code is active, the ECM must be replaced. Possible repairs: 1)Replace the ECM. PACCAR PX-6 CM2150 (2007-09) Fault Code: 692 PID: 692 SPN: 1172 FMI: 4 Turbocharger 1 Compressor Inlet Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the...

Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM. The ECM monitors the position of the missing tooth on the crankshaft speed sensor target and the camshaft speed sensor target. If the two positions do not match, the ECM then determines that there is a mechanical misalignment between the two sensors. This fault code is logged when there is a mechanical misalignment between the crankshaft engine position sensor and the camshaft engine position sensor. Possible causes:...

Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe™ Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM. This fault is logged when the ECM does not receive a valid camshaft position signal. Possible causes: 1)Open or short circuit of the 5 volt SUPPLY, SIGNAL, or RETURN wire in the engine harness2)Damaged or malfunctioning camshaft position sensor. Possible repairs: 1)Replace the sensor.2)Replace the engine wiring harness.3)Replace or shim the sensor if the air gap is out of specification. If the target runout is excessive, replace...