Daewoo CIELO EURO III, Manual

Page: 267 / 603

ENGINE CONTROLS 1F – 98
DAEWOO T-154 BL2,3
Important: After repairs, use the scan tool BLOCK
LEARN RESET function to reset long-term fuel trim to
128 (0%).
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Table.
1. The On-Board Diagnostic (EOBD) System Check
prompts the technician to complete some basic
checks and store the freeze frame and failure re-
cords data on the scan tool if applicable. This
creates an electronic copy of the data taken when
the malfunction occurred. The information is then
stored on the scan tool for later reference.
2. This step will determine if DTC P0107 is the result of
a hard failure or an intermittent condition.
3. Jumpering harness terminals B to C (signal circuit to
5 volts) will determine if the sensor is malfunctioning
or if there is a problem with the ECM or wiring.
6. The scan tool may not display 5 volts. The important
thing is that the ECM recognizes the voltage
as more than 4 volts, indicating that the and
the signal circuit are OK.
7. A short to ground in the 5 volt reference circuit could
also set additional DTCs.
11. The replacement ECM must be repro-
grammed. Refer to the latest Techline procedure for
the ECM reprogramming.
DTC P0107 Manifold Absolute Pressure (MAP) Sensor Low Voltage
Step Action Value Yes No
1
Perform an On-Board Diagnostic (EOBD) System
Check.
Is the system check complete?
–
Go to Step 2
Go to
“On-Board
Diagnostic
System Check”
2
With engine idling, install a scan tool.
Does the scan tool display Manifold Absolute
Pressure (MAP) voltage below the specified value?
12 kPa Go to Step 3 Go Step 4
3
1. Turn the ignition switch OFF.
2. Disconnect the MAP sensor electrical connector.
3. Jumper the MAP signal circuit at terminal B to the
5 volt reference circuit at terminal C.
4. Turn the ignition switch ON.
Does the MAP sensor read more than the specified
value?
96 kPa Go to Step 5 Go to Step 6
4
1. Turn the ignition switch ON with the engine OFF,
review the Freeze Frame data, and note the
parameters.
2. Operate the vehicle within the freeze frame
conditions and Conditions For Setting the DTC as
noted.
Does the scan tool display MAP sensor below the
specified value?
12 kPa Go to Step 3
Go to
“Diagnostic
Aids”
5
Inspect the MAP sensor harness electrical
connector terminals for the following conditions:
Poor connections
Proper contact tension
Poor terminal to wire connection
Is a problem found?
–
Go to Step 8 Go to Step 9
6
1. Turn the ignition switch OFF.
2. Remove the jumper wire.
3. Probe the MAP sensor signal circuit terminal
B with a test light to B+.
4. Turn the ignition switch ON.
Does the scan tool read over the specified value?
90 kPa Go to Step 7 Go to Step 12