Checking Of Engine Speed Signal(Ess)Circuit - DAELIM Roadwin R Service Manual

EMS(Engine Management System)

12.CHECKING OF ENGINE SPEED SIGNAL(ESS)CIRCUIT

Fault code number is displayed by MIL
CHECKING CIRCUIT
TACHOMETER
ECU
32 : ESS(ENGINE SPEED SIGNAL)
Coupler terminal is based on the side of Wire-Harness.
CHECK PROCEDURE
1) Turn off the ignition key .
2) Check the ESS coupler is loose, or bad.
If there is no problem, check the resistance of tachometer.
3) Check the resistance between each terminals and ground.
Measuring terminal:
The resistance between each terminals and ground : ∞[ ]
If the measured resistance value is abnormal, replace the part with new one.
Refer to ( ) for assembly and disassembly
Remark : Measuring unit of voltage : Resistance [ ]
4) If the measured resistance and continuity are abnormal,
. Replace the tachometer with new one, and it rechecks.
5) If the resistance and continuity are normal, contact the tachometer coupler.
6)Turn on the ignition key.
7) Measure the voltage or tachometer of wire harness for ECU check.
Measuring terminal:
Measuring terminal: ECU No. 32(B/Y: BLACK/YELLOW) ~ G electric wire =>Output voltage: 9[V]~15[V]
Measuring terminal: ECU No. 32(B/Y: BLACK/YELLOW) ~
wire, using the PVA(peak voltage adapter) multi-tester tool.
Remark : Measuring unit of voltage : Voltage[V]
If the measured voltage is normal,
Check the 'B/Y' electric wire, 'B' electric wire, 'G' electric wire to see
if they have been broken or have short- circuited if there is a bad
contact of terminal No. 32 of ECU coupler.
If there is no problem in wires, ECU has is broken.
Replace the ECU with new one, and recheck it.
If the measured voltage is abnormal,
Check the 'B/Y' electric wire, 'B' electric wire, 'G' electric wire to see if they have been
broken or have short- circuited.
8) After fault repaired, To erase the memorized fault code in the ECU is refer to how to remove the fault code(5-10)
5-30
B electric wire ~ EARTH,
B electric wire ~ G electric wire => Output Voltage: battery voltage
ECU NO. 32 (B/Y:BLACK/YELLOW) ~
G Measuring the output voltage of electric
EARTH