12-58 FI SYSTEM DIAGNOSIS
“63” (P01771) CRANKSHAFT ROTATION SIGNAL CIRCUIT MALFUNCTION
NOTE:
After repairing the trouble, clear the DTC using SDS tool. (
12-21)
INSPECTION
Step 1
1) Stop the engine.
2) Check the crankshaft rotation signal sensor coupler
1
for
loose or poor contacts.
If OK, then measure the crankshaft rotation signal sensor
resistance.
3) Disconnect the crankshaft rotation signal sensor coupler and
measure the resistance.
Crankshaft rotation signal sensor resistance:
0.1 – 0.8
Ω
(B/R – R/W)
DETECTED CONDITION
POSSIBLE CAUSE
CKP sensor (pick-up coil) signal is produces, but sig-
nal from crankshaft rotation signal sensor is not
input for 3 seconds or more.
• Metal particles or foreign material being stuck on
the crankshaft rotation signal sensor and rotor tip.
• Crankshaft rotation signal sensor circuit open or
short.
• Crankshaft rotation signal sensor malfunction.
• ECM malfunction.
ECM
Crankshaft rotation signal sensor
SIG
B
R/W
B/R
B/W
When using the multi circuit tester, do not strongly touch the terminal of the ECM coupler with
a needle-pointed tester probe to prevent the terminal damage or terminal bend.
1
1
