Suzuki Jimny Service Manual page 437

6-80 ENGINE GENERAL INFORMATION AND DIAGNOSIS
INSPECTION
Step
1 Was "Engine Diag. Flow Table" performed?
2 Check CKP Sensor and connector for proper
installation.
Is CKP sensor installed properly and connector
connected securely?
3 Check Wire Harness and Connection.
1) Disconnect connector from CKP sensor.
2) Check for proper connection to CKP sensor at
each terminal.
3) If OK, turn ignition switch ON and check for
voltage at each terminal of sensor connector
disconnected. See Fig. 1.
Terminal "B+" : 10 – 14 V
Terminal "Vout" : 4 – 5 V
Terminal "GND" : 0 V
Is check result satisfactory?
4 Was terminal "Vout" voltage out of specification in
Step 3 check?
5 Check Ground Circuit for Open.
1) Turn ignition switch OFF.
2) Check for continuity between "GND" terminal
of CKP sensor connector and engine ground.
Is continuity indicated?
6 Check CKP Sensor for Operation.
1) Remove CKP sensor from sensor case.
2) Remove metal particles on end face of CKP
sensor, if any.
3) Connect each connector to ECM and CKP
sensor.
4) Turn ignition switch ON.
5) Check for voltage at terminal E19-23 of con-
nector connected to ECM by passing magnetic
substance (iron) (1) while keeping approxi-
mately 1 mm (0.03 in.) gap with respect to end
face of CKP sensor. See Fig. 2 and 3.
Does voltage vary from low (0 – 1 V) to high (4 – 5
V) or from high to low?
7 Check signal rotor for the following. See Fig. 4.
• Damage
• No foreign material attached
Is it in good condition?
Action Yes
Go to Step 2.
Go to Step 3.
Go to Step 5.
"G/R" wire open, short or
poor connection.
If wire and connection are
OK, substitute a known-
good ECM and recheck.
Go to Step 6.
Go to Step 7.
Intermittent trouble or
faulty ECM.
Check for intermittent
referring to "Intermittent
and Poor Connection" in
Section 0A.
No
Go to "Engine Diag.
Flow Table".
Correct.
Go to Step 4.
"Bl/B" or "B/R" wire
open, short or poor
connection.
"B/R" wire open or
poor ground connec-
tion.
Replace CKP sensor.
Clean rotor teeth or
replace CKP sensor.