AUTOMATIC TRANSAXLE DIAGNOSIS
The crankshaft position sensor power is supplied
from the MFI relay (terminal 3), and the ground
(terminal 1) is provided on the vehicle body. The
PCM supplies a five-volts voltage to crankshaft
position sensor output terminal (terminal 2). The
crankshaft position sensor generates a pulse signal
when the output terminal is opened and grounded.
The sensor is opened and closed as the flat on the
crankshaft passes by.
DTC SET CONDITIONS
If no output pulse is detected from the crankshaft
position sensor for five seconds or more while driving
at 25 km/h (16 mph) or more, it is judged that there is
an open circuit in the crankshaft position sensor and
diagnostic trouble code number "21" is sent.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set:)
Malfunction of the crankshaft position sensor
Damaged harness, connector
Malfunction of the PCM
Required Special Tool:
MB991502: Scan Tool (MUT-II)