- Engine:
- CG137-08 (S/N: WWF1-UP)
- CG137-12 (S/N: WRX1-UP)
Introduction
The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.
Problem
If, the engine does crank but will not start and does not have any active codes, inspect the secondary speed timing sensor, sensor wiring and and the wiring harness. Ensure that the sensor is installed correctly and free of debris and damage.
This engine utilizes two speed/timing sensors to detect the speed and the timing for the engine. The primary (camshaft) speed/timing sensor is used to detect engine speed and camshaft position during engine starting and also while the engine is running. The secondary (crankshaft) speed timing sensor is used only during engine cranking in order to determine top center of the No. 1 cylinder.
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| Illustration 1 | g02644459 |
Features machined into the flywheel for speed/timing detection. | |
The secondary engine speed/timing sensor utilizes a series of holes that are machined into the outer surface of the flywheel to establish a signal.
The pattern of holes includes two holes that are strategically spaced in order to provide a unique signal pattern to the ECM. The ECM utilizes the signal pattern to locate top center for the No. 1 cylinder.
If the ECM loses the signal from the secondary speed/timing sensor with the engine stopped, the engine will crank but the engine will not start. If a problem with the signal from the secondary speed/timing sensor occurs while the engine is running, the engine will continue to run.
Solution
Clean debris if found, reinstall the sensor. Replace the sensor if damage is found. Repair or replace any wiring damage found.