Geely CK (2008). Manual part — 46
Geely CK (2008). Manual part - 46
181
3. TACHOMETER MALFUNCTION
CIRCUIT DIAGRAM
Inspection procedure
(a) Inspect the combination meter assembly revolution input signal
1
Remove the combination meter assembly and retain the connection of connectors.
2
Connect the oscilloscope to the terminal B11 and
ground.
3
Start the engine
4
Inspect the signal wave form
Standard:
Show the correct wave form
Result and solution:
Normal Inspect and replace the combination
meter assembly
Abnormal Inspect the engine ECU revolution out-
put signal
Engine ECU
Combined Meter Assembly
Engine Revolution Signal
182
(b) Inspect the engine ECU revolution output signal
1
Remove the engine ECU and retain the connection of connectors.
2
Connect the oscilloscope to the terminal 54 and ground.
3
Start the engine
4
Inspect the signal wave form
Standard:
Show the correct wave form
Result and solution:
Normal Repair or replace the harness or
connector
Abnormal Inspect the engine control system
183
4. WATER TEMPERATURE GAUGE MALFUNCTION
CIRCUIT DIAGRAM
(a) Get the value of water temperature with the diagnosis tester
1
Connect the diagnosis tester to the diagnosis interface
2
Turn the ignition switch to ON
3
Read the value of engine water temperature displayed on the diagnosis tester
Standard: The same with the actual engine coolant temperature.
Result and solution:
If it is normal, the water temperature gauge has no malfunction
If abnormal, Inspect the combination meter assembly
(b) Inspect the combination meter assembly
1
Inspect resistance
Remove the combination meter assembly and disconnect connectors
Inspect continuity between terminals
Water Temperature Sensor
Combined Meter Assembly
Water
Temperature
Signal
184
Standard:
Result and solution:
Normal Replace the combination meter assembly
If abnormal inspect the water temperature sensor
2
Inspect the water temperature sensor
Remove the water temperature sensor and put it into the constant temperature cabinet.
Adjust the temperature in the constant temperature cabinet and measure the resistance of the
water temperature sensor.
Standard:
Result and solution:
Normal Repair or replace the harness and connector
If abnormal replace the water temperature sensor
Tester connection
Condition
Standard condition
C(60℃ )
164.5±5Ω
1/2C(90℃)
56±3Ω
H(115℃)
28.7±2Ω
B5 - ground
Condition
Standard condition
C(60℃
)
164.5±5Ω
1/2C(90℃
)
56±3Ω
H(115℃
)
28.7±2Ω
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