Page 1497 of 2643
5A1 – 148IZF 4 HP 16 AUTOMATIC TRANSAXLE
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE(DTC) P1851
SOLENOID 1 OUTPUT SHORTED TO POWER
Circuit Description
The shift solenoids are two identical, normally open elec-
tronic exhaust valves that control upshifts and downshifts
in all forward gear ranges. These shift solenoids work to-
gether in a combination of ON and OFF sequences to con-
trol the line pressure and shift mechanisms(clutches,
brakes).
Solenoid 1 controls the high or low of the line pressure
(flow to each clutch valve) by the operation type (ON/
OFF), i.e. solenoid 1 is ON, line pressure will be low
(87~116psi (6~8bar)), solenoid 1 is OFF, line pressure will
be high (232~261psi (16~18bar)). Solenoid 2 controls the
oil flow to clutch valve E or lock–up clutch valve by the ON/
OFF signal.
The TCM monitors numerous inputs to determine the ap-
propriate solenoid state combination and transaxle gear
tor the vehicle operating conditions.
Conditions for Setting the DTCS Solenoid wiring shorted to power.
S No DTC P1850, P1852.
S Immediately after the above condition occurs.
Action Taken When The DTC Sets
S The Malfunction Indicator Lamp(MIL) will illuminate.
S The TCM will record operating conditions at the
time the diagnostic fails. This information will be
stored in the Failure Records buffer.
Conditions for Clearing the MIL/DTC
S The MIL will turn OFF when the malfunction has
not occurred after three–ignition cycle.
S A history DTC will clear after 40 consecutive warm
up cycles without a fault.
S Using a scan tool can clear history DTCs.
Diagnostic Aids
S When DTC P1851 sets, the possible cause of fault
could be solenoid 1.
Page 1498 of 2643
ZF 4 HP 16 AUTOMATIC TRANSAXLE 5A1 – 149
DAEWOO V–121 BL4
DTC P1851 – Solenoid 1 Output Shorted To Power
StepActionValue(s)YesNo
1Perform an On–Board Diagnostic (EOBD) System
Check.
Is the check completed?–Go to Step 2Go to ”On–
Board Diagnos-
tic System
Check”
21. Install the scan tool.
2. Turn the ignition ON, with the engine OFF.
3. Select ”Actuating” on the scan tool.
4. Actuate solenoid 1 ON/OFF.
Does the solenoid 1 change ON/OFF?ON/OFFGo to ”Diag-
nostic Aids”Go to Step 3
31. Remove the oil pan.
2. Disconnect the wiring connector of solenoid 1.
3. Turn the ignition ON, with the engine OFF.
4. Measure the voltage of solenoid 1 wiring con-
nector terminal 1.
Is the voltage within the values shown?11–14VGo to Step 4Go to Step 5
4Repair the internal line(solenoid 1) for a short to pow-
er.
Is the repair complete?–System OK–
5Replace the solenoid 1.
Is the replacement complete?–Go to Step 6–
61. Check if any DTCs are set.
2. Are any DTCs displayed that have not been
diagnosed?–Go to ”Applica-
ble DTC table”System OK
Page 1499 of 2643
5A1 – 150IZF 4 HP 16 AUTOMATIC TRANSAXLE
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE(DTC) P1852
SOLENOID 1 OUTPUT OPEN
Circuit Description
The shift solenoids are two identical, normally open elec-
tronic exhaust valves that control upshifts and downshifts
in all forward gear ranges. These shift solenoids work to-
gether in a combination of ON and OFF sequences to con-
trol the line pressure and shift mechanisms(clutches,
brakes).
Solenoid 1 controls the high or low of the line pressure
(flow to each clutch valve) by the operation type (ON/
OFF), i.e. solenoid 1 is ON, line pressure will be low
(87~116psi (6~8bar)), solenoid 1 is OFF, line pressure will
be high (232~261psi (16~18bar)). Solenoid 2 controls the
oil flow to clutch valve E or lock–up clutch valve by the ON/
OFF signal.
The TCM monitors numerous inputs to determine the ap-
propriate solenoid state combination and transaxle gear
tor the vehicle operating conditions.
Conditions for Setting the DTC
S Solenoid wiring open.
S No DTC P1850, P1851.S Immediately after the above condition occurs.
Action Taken When The DTC Sets
S The Malfunction Indicator Lamp(MIL) will illuminate.
S The TCM will record operating conditions at the
time the diagnostic fails. This information will be
stored in the Failure Records buffer.
S Adopt Emergency/ Substitute mode and constant
4th gear by hydraulic control.
S After ignition OFF/ON : 3rd gear by hydraulic con-
trol. Possible P, R and N also possible.
Conditions for Clearing the MIL/DTC
S The MIL will turn OFF when the malfunction has
not occurred after three–ignition cycle.
S A history DTC will clear after 40 consecutive warm
up cycles without a fault.
S Using a scan tool can clear history DTCs.
Diagnostic Aids
S When DTC P1852 sets, the possible cause of fault
could be solenoid 1.
Page 1500 of 2643
ZF 4 HP 16 AUTOMATIC TRANSAXLE 5A1 – 151
DAEWOO V–121 BL4
DTC P1852 – Solenoid 1 Output Open
StepActionValue(s)YesNo
1Perform an On–Board Diagnostic (EOBD) System
Check.
Is the check completed?–Go to Step 2Go to ”On–
Board Diagnos-
tic System
Check”
21. Install the scan tool.
2. Turn the ignition On, with the engine OFF.
3. Select ”Actuating” on the scan tool.
4. Actuate solenoid 1 ON/OFF.
Does the solenoid 1 change ON/OFF?ON/OFFGo to ”Diag-
nostic Aids”Go to Step 3
31. Turn the ignition OFF.
2. Disconnect the transaxle wiring connector.
3. Measure the resistance between terminals 3
and 12 of the transaxle wiring connector.
Is the resistance within the values shown?TFT
25°C (77°F)
6 ΩGo to Step 7Go to Step 4
41. Remove the oil pan.
2. Disconnect the wiring connector of solenoid 1.
3. Measure the resistance between terminal 1 of
solenoid 1 and terminal 12 of the transaxle wir-
ing connector.
4. Measure the resistance between terminal 2 of
solenoid 1 and terminal 3 of the transaxle wir-
ing connector.
Is the resistance within the values shown? 0 WGo to Step 6Go to Step 5
51. Repair the line(between terminal 1 and terminal
12) for an open.
2. Repair the line(between terminal 2 and terminal
3) for an open.
Is the repair complete?–System OK–
6Replace the solenoid 1.
Is the replacement complete?–System OK–
71. Disconnect the transaxle wiring connector and
TCM connector.
2. Measure the resistance between terminal 3 of
the transaxle wiring connector and terminal C8
of the TCM wiring connector.
3. Measure the resistance between terminal 12 of
the transaxle wiring connector and terminal A9
of the TCM wiring connector.
Is the resistance within the values shown? 0 WGo to Step 9Go to Step 8
8Repair the transaxle wiring harness for an open.
Is the repair complete?–System OK–
9Replace the TCM.
Is the replacement complete?–Go to Step 10–
101. After the repair, use a scan tool ”clear info”
function and road test the vehicle.
2. Review the ”DTC info”.
3. Has the last test failed or is the current DTC
displayed?–Begin diagno-
sis againRepair verified
exit DTC chart
Page 1501 of 2643
5A1 – 152IZF 4 HP 16 AUTOMATIC TRANSAXLE
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE(DTC) P1853
SOLENOID 2 OUTPUT SHORTED TO GROUND
Circuit Description
The shift solenoids are two identical, normally open elec-
tronic exhaust valves that control upshifts and downshifts
in all forward gear ranges. These shift solenoids work to-
gether in a combination of ON and OFF sequences to con-
trol the line pressure and shift mechanisms(clutches,
brakes).
Solenoid 2 controls the high or low of the line pressure
(flow to each clutch valve) by the operation type (ON/
OFF), i.e. solenoid 2 is ON, line pressure will be low
(87~116psi (6~8bar)), solenoid 1 is OFF, line pressure will
be high (232~261psi (16~18bar)). Solenoid 2 controls the
oil flow to clutch valve E or lock–up clutch valve by the ON/
OFF signal.
The TCM monitors numerous inputs to determine the ap-
propriate solenoid state combination and transaxle gear
tor the vehicle operating conditions.
Conditions for Setting the DTC
S Solenoid wiring shorted to ground.
S No DTC P1854, P1855.S Immediately after the above condition occurs.
Action Taken When The DTC Sets
S The Malfunction Indicator Lamp(MIL) will illuminate.
S The TCM will record operating conditions at the
time the diagnostic fails. This information will be
stored in the Failure Records buffer.
S Adopt Emergency/ Substitute mode and constant
4th gear by hydraulic control.
S After ignition OFF/ON : 3rd gear by hydraulic con-
trol. Possible P, R and N also possible.
Conditions for Clearing the MIL/DTC
S The MIL will turn OFF when the malfunction has
not occurred after three–ignition cycle.
S A history DTC will clear after 40 consecutive warm
up cycles without a fault.
S Using a scan tool can clear history DTCs.
Diagnostic Aids
S When DTC P1853 sets, the possible cause of fault
could be solenoid 2.
Page 1502 of 2643
ZF 4 HP 16 AUTOMATIC TRANSAXLE 5A1 – 153
DAEWOO V–121 BL4
DTC P1853 – Solenoid 2 Output Shorted To Ground
StepActionValue(s)YesNo
1Perform an On–Board Diagnostic (EOBD) System
Check.
Is the check completed?–Go to Step 2Go to ”On–
Board Diagnos-
tic System
Check”
21. Install the scan tool.
2. Turn the ignition On, with the engine OFF.
3. Record then clear DTC(s).
4. Select ”Actuating” on the scan tool.
5. Actuate solenoid 2 ON/OFF.
Does the solenoid 2 change ON/OFF?ON/OFFGo to ”Diag-
nostic Aids”Go to Step 3
31. Turn the ignition OFF.
2. Disconnect the transaxle wiring connector.
3. Measure the resistance between terminals 3
and 12 of the transaxle wiring connector.
Is the resistance within the values shown?TFT
25°C (77°F)
26~34.5 ΩGo to Step 7Go to Step 4
41. Remove the oil pan.
2. Disconnect the wiring connector of solenoid 2.
3. Measure the resistance between terminal 2 of
solenoid 2 and ground.
4. Measure the resistance between terminal 1 of
solenoid 2 and ground.
Is the resistance within the values shown?Go to Step 6Go to Step 5
5Repair the internal line(solenoid 2) for a short to
ground.
Is the repair complete?–System OK–
6Replace the solenoid 2.
Is the replacement complete?–System OK–
71. Disconnect the transaxle wiring connector and
TCM connector.
2. Measure the resistance between terminal 3 of
the transaxle wiring connector and ground.
3. Measure the resistance between terminal 13 of
the transaxle wiring connector and ground.
Is the resistance within the values shown?Go to Step 9Go to Step 8
8Repair the transaxle wiring harness for a short to
ground.
Is the repair complete?–System OK–
9Replace the TCM.
Is the replacement complete?–Go to Step 10–
101. After the repair, use a scan tool ”clear info”
function and road tests the vehicle.
2. Review the ”DTC info”.
3. Has the last test failed or is the current DTC
displayed?–Begin diagno-
sis againRepair verified
exit DTC chart
Page 1503 of 2643
5A1 – 154IZF 4 HP 16 AUTOMATIC TRANSAXLE
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE(DTC) P1854
SOLENOID 2 OUTPUT SHORTED TO POWER
Circuit Description
The shift solenoids are two identical, normally open elec-
tronic exhaust valves that control upshifts and downshifts
in all forward gear ranges. These shift solenoids work to-
gether in a combination of ON and OFF sequences to con-
trol the line pressure and shift mechanisms(clutches,
brakes).
Solenoid 2 controls the high or low of the line pressure
(flow to each clutch valve) by the operation type (ON/
OFF), i.e. solenoid 2 is ON, line pressure will be low
(87~116psi (6~8bar)), solenoid 1 is OFF, line pressure will
be high (232~261psi (16~18bar)). Solenoid 2 controls the
oil flow to clutch valve E or lock–up clutch valve by the ON/
OFF signal.
The TCM monitors numerous inputs to determine the ap-
propriate solenoid state combination and transaxle gear
tor the vehicle operating conditions.
Conditions for Setting the DTC
S Solenoid wiring shorted to power.S No DTC P1853, P1855.
S Immediately after the above condition occurs.
Action Taken When The DTC Sets
S The Malfunction Indicator Lamp(MIL) will illuminate.
S The TCM will record operating conditions at the
time the diagnostic fails. This information will be
stored in the Failure Records buffer.
S Adopt Emergency/ Substitute mode and constant
4th gear.
Conditions for Clearing the MIL/DTC
S The MIL will turn OFF when the malfunction has
not occurred after three–ignition cycle.
S A history DTC will clear after 40 consecutive warm
up cycles without a fault.
S Using a scan tool can clear history DTCs.
Diagnostic Aids
S When DTC P1854 sets, the possible cause of fault
could be solenoid 2.
Page 1504 of 2643
ZF 4 HP 16 AUTOMATIC TRANSAXLE 5A1 – 155
DAEWOO V–121 BL4
DTC P1854 – Solenoid 2 Output Shorted To Power
StepActionValue(s)YesNo
1Perform an On–Board Diagnostic (EOBD) System
Check.
Is the check completed?–Go to Step 2Go to ”On–
Board Diagnos-
tic System
Check”
21. Install the scan tool.
2. Turn the ignition On, with the engine OFF.
3. Select ”Actuating” on the scan tool.
4. Actuate solenoid 2 ON/OFF.
Does the solenoid 2 change ON/OFF?ON/OFFGo to ”Diag-
nostic Aids”Go to Step 3
31. Remove the oil pan.
2. Disconnect the wiring connector of solenoid 2.
3. Turn the ignition ON, with the engine OFF.
4. Measure the voltage of solenoid 2 wiring con-
nector terminal 1.
Is the voltage within the values shown?11–14VGo to Step 4Go to Step 5
4Repair the internal line(solenoid 2) for a short to pow-
er.
Is the repair complete?–System OK–
5Replace the solenoid 2.
Is the replacement complete?–Go to Step 6–
61. Check if any DTCs are set.
2. Are any DTCs displayed that have not been
diagnosed?–Go to ”Applica-
ble DTC table”System OK
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