The crankshaft angular sensor detects and counts the teeth on the crankshaft and provides ECM with the information on the current position of crank angle and cylinder. This signal is fed to ECM to be used to determine the engine speed and adjust the fuel injection timing. The camshaft position sensor detects the teeth target wheel and provides ECM with the information on the current position of piston and cylinder.
This signal is fed to ECM to be used to determine the sequence of fuel injection.
In case of the the crankshaft angular sensor or the camshaft position sensor failure, the engine symptoms will occur a running engine stall, starting impossible and rough idle with noise.
If the CMP signal is not geneated, the ECM judged this as a fault and DTC is set.
Item | Detecting Condition | Possible Cause |
DTC Strategy | ● Signal check | ● Open or short in power circuit ● Open or short in signal circuit ● Open in ground circuit ● Faulty CMP ● Faulty CMP dowel pin ● Faulty ECM |
Enable Conditions | ● Engine run | |
Threshold Value | ● Cam signal fails at the condition of crank signal generation. (Cam signal static defection) | |
Diagnostic Time | ● 0.7 sec. | |
MIL Fuel Limit Fuel Cut EGR Off | ● No ● No ● Yes ● No |
CKP | |
Resistance | 860 ± 10% Ω at 20°C |
