Suzuki 2000 Grand Vitara SQ625 Service Manual page 202

DTC TROUBLESHOOTING
STEP
1 Was "ENGINE DIAG. FLOW TABLE" performed?
2 CKP Sensor and Its Circuit Resistance check:
(1) With ignition switch OFF, disconnect ECM (PCM)
coupler (C51-3).
(2) Check resistance between C51-3-2 and C51-3-3.
Is the resistance 484 – 656 W?
3 CKP Sensor Resistance check:
(1) With ignition switch OFF, disconnect CKP sensor
coupler.
(2) Check resistance between "2" and "3" terminal of
CKP sensor coupler.
Is the resistance 485 – 655 W?
4 CKP Sensor Visual inspection:
(1) Check CKP sensor installation and teeth of
crankshaft referring to "ENGINE MECHANICAL"
section.
Are they OK?
Fig. for STEP 3
ACTION
ENGINE (H25 ENGINE) 6-1-91
YES
Go to Step 2.
Go to Step 4.
Faulty "W/Bl" wire
or "Or/B" wire.
Poor C51-3-2 and/or
C51-3-3 terminal of
ECM (PCM) coupler
connection.
"W/Bl" wire or "Or/Bl"
wire shorted to other
circuit.
If OK, substitute a
known-good ECM
(PCM) and recheck.
NO
Go to "ENGINE
DIAG. FLOW
TABLE".
Go to Step 3.
Faulty CKP sensor.
Replace or reinstall.