engine controls DAEWOO LACETTI 2004 Service Repair Manual

9E – 10IINSTRUMENTATION/DRIVER INFORMATION
DAEWOO V–121 BL4
SPEEDOMETER
Speedometer Inoperative, Other Gauges and Warning Lamps Are
OK
StepActionValue(s)YesNo
11. Connect a scan tool.
2. Check for engine control diagnostic trouble
codes (DTCs).
Is the vehicle speed sensor DTC set?–Go to
Section 1F, En-
gine ControlsGo to Step 2
21. Turn the ignition OFF.
2. Disconnect the engine control module (ECM)
connector.
3. Remove the instrument cluster.
4. Check continuity between ECM terminal K6
(B23 ; HV–240, 51 ; SIRIUS D4) and the in-
strument cluster connector terminal B5.
Does the ohmmeter indicate the specified value?0 WGo to Step 4Go to Step 3
3Repair the open circuit between the instrument clus-
ter connector terminal B5 and the ECM.
Is the repair complete?–System OK–
4Replace the speedometer.
Is the repair complete?–System OK–
FUEL GAUGE
Fuel Gauge Inoperative, Other Gauges and Warning Lamps are OK
StepActionValue(s)YesNo
11. Connect a scan tool.
2. Check for engine control diagnostic trouble
codes (DTCs).
Is the vehicle speed sensor DTC set?–Go to
Section 1F, En-
gine ControlsGo to Step 2
21. Turn the ignition OFF.
2. Disconnect engine control module (ECM) con-
nector.
3. Remove the instrument cluster.
4. Check continuity between ECM terminal K30
(B31 ; HV–240, 40 ; SIRIUS D4) and the in-
strument cluster terminal B3.
Does the ohmmeter indicate the specified value?0 WGo to Step 4Go to Step 3
3Repair the open circuit between the instrument clus-
ter connector terminal B3 and the ECM terminal K30
(B31; HV–240, 40 ; SIRIUS D4).
Is the repair complete?–System OK–
4Replace the fuel gauge.
Is the repair complete?–System OK–

INSTRUMENTATION/DRIVER INFORMATION 9E – 11
DAEWOO V–121 BL4
TEMPERATURE GAUGE
Temperature Gauge Inoperative, Other Gauges and Warning
Lamps are OK
StepActionValue(s)YesNo
1Allow the engine to cool to room temperature.
With the ignition ON, does the temperature gauge al-
ways read at the high end of the scale?–Go to Step 7Go to Step 2
2Disconnect ECM electrical connector.
Does the temperature gauge indicator drop to the
low end of the scale?–Go to
Section 1F, En-
gine ControlsGo to Step 3
3Check for a short to ground between the ECM and
the temperature gauge.
Is there a short to ground?–Go to Step 4Go to Step 5
4Repair the short to ground.
Is the repair complete?–System OK–
5Replace the temperature gauge.
Is the repair complete?–System OK–
61. Disconnect the ECM.
2. Turn the ignition ON.
3. Check the voltage at the ECM.
Does the the voltage equal the value specified?11–14 vGo to Step 9Go to Step 7
7Check for an open circuit between the ECM and the
temperature gauge.
Is there an open circuit?–Go to Step 8Go to Step 5
8Repair the open circuit between the ECM and the
temperature gauge.
Is the repair complete?–System OK–
91. Disconnect the ECM.
2. Connect a jumper wire between the ECM con-
nector and ground.
3. Turn the ignition ON.
Does the temperature gauge move to the high end
of the scale?–Go to
Section 1F, En-
gine ControlsGo to Step 5