TGB BLADE 600 Service Manual page 273

15-2. ELECTRIC POWER STEERING
TROUBLESHOOTING
NO POWER STEERING
1. EPS malfunction.
- If the CHECK ENGINE light is on and a EPS
FAULT message is visible in the dashboard,
check for fault code at the bottom of
dashboard.
2. No power to EPS unit.
- Carry out an EPS unit FUSE test. Replace
as required.
- Carry out an EPS unit INPUT VOLTAGE
test (POWER SIDE). Repair or replace
wiring/connectors as required.
- Carry out an EPS unit INPUT VOLTAGE
test (CONTROL SIDE). Repair or replace
wiring/connectors as required.
3. NO ground to EPS unit.
- Carry out an EPS unit GROUND CIRCUIT
test. Repair or replace wiring/connectors as
required.
4. No engine RPM signal from ECU.
- If engine RPM can be displayed in the
dashboard when the engine is running, carry
out an EPS unit COMMUNICATION LINK
(can) CONTINUITY test. Repair or replace
wiring/connectors as required.
- If engine RPM cannot be displayed in the
dashboard, use diagnostic tool to check for
applicable fault codes. Carry out service
actions.
15-2-6
LOW POWER STEERING ASSIST
1. Low battery voltage.
- Check battery terminals. Clean, repair,
replace or tighten as required.
- Test battery voltage. Recharge or replace
battery as required.
- Carry out an EPS unit INPUT VOLTAGE test
(POWER SIDE) as detailed in this
subsection. Ensure power connector pins
are clean, corrosion free, tight and make
good contact. Repair or replace
wiring/connectors as required.
- Carry out an EPS SYSTEM LOAD TEST as
detailed in this subsection.
2. Low input voltage to EPS unit.
- Carry out an EPS unit INPUT VOLTAGE test
(POWER SIDE) as detailed in this
subsection. Ensure power connector pins
are clean, corrosion free, tight and make
good contact. Repair or replace
wiring/connectors as required.
3. Faulty EPS ground circuit.
- Carry out an EPS GROUND CIRCUIT test.
Ensure EPS ground connector pins and
frame ground post are clean, corrosion free,
tight and make good contact. Repair or
replace wiring/connector as required.
ASYMMETRICAL POWERT STEERING
ASSIST (SIDE TO SIDE)
1. Torque sensor not reset to zero.
- Ensure steering alignment is within
specification and carry out the TORQUE
OFFSET RESET procedure detailed in this
subsection.