Dodge Neon / Neon SRT-4. Manual — part 553
TEST
ACTION
APPLICABILITY
6
NOTE: This engine system utilizes three solenoids to control turbocharger
operation. Perform the following four Solenoid Tests on each of the three
solenoids one at a time.
Turn the ignition off.
Disconnect the hoses from the appropriate Solenoid.
Install a plug on the Solenoid hose B connection point.
Connect a vacuum pump to the Solenoid hose A connection point.
With vacuum pump apply 20 inches of vacuum to the Solenoid hose A connection
point.
NOTE: Vacuum reading should not drop below 10 inches within 5 seconds.
Does vacuum read above 10 inches for at least 5 seconds?
All
Yes
→ Go To 7
No
→ Replace the appropriate Solenoid.
7
Turn the ignition off.
Disconnect the hoses from the appropriate Solenoid.
Install a plug on the Solenoid hose C connection point.
Connect a vacuum pump to the Solenoid hose A connection point.
Attempt to apply 20 inches of vacuum to the Solenoid hose A connection point.
NOTE: Vacuum should escape through the Solenoid hose B connection
point.
Does vacuum escape through the Solenoid hose B connection point?
All
Yes
→ Go To 8
No
→ Replace the appropriate Solenoid.
8
Turn the ignition off.
Disconnect the hoses from the appropriate Solenoid.
Install a plug on Solenoid hose C connection point.
Connect a vacuum pump to the Solenoid hose B connection point.
NOTE: For the result of this test to be accurate the solenoid must be turned
on. Apply 12 volts and Ground to the appropriate solenoid terminals to turn
the solenoid on.
With vacuum pump apply 20 inches of vacuum to the Solenoid hose B connection
point.
NOTE: Vacuum reading should not drop below 10 inches within 5 seconds.
Does vacuum read above 10 inches for at least 5 seconds?
All
Yes
→ Go To 9
No
→ Replace the appropriate Solenoid.
9
Turn the ignition off.
Disconnect the hoses from the appropriate Solenoid.
Install a plug on the Solenoid hose A connection point.
Connect a vacuum pump to the Solenoid hose B connection point.
NOTE: For the result of this test to be accurate the solenoid must be turned
on. Apply 12 volts and Ground to the appropriate solenoid terminals to turn
the solenoid on.
Attempt to apply 20 inches of vacuum to the Solenoid hose B connection point.
NOTE: Vacuum should escape through the Solenoid hose C connection
point.
Does vacuum escape through the Solenoid hose C connection point?
All
Yes
→ Go To 10
No
→ Replace the appropriate Solenoid.
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DRIVEABILITY - NGC
P0234-OVERBOOST PERFORMANCE —
Continued
TEST
ACTION
APPLICABILITY
10
Did all the solenoids function correctly?
All
Yes
→ Replace the Turbocharger assembly in accordance with the Ser-
vice Information.
No
→ Replace Solenoid(s) as necessary.
118
DRIVEABILITY - NGC
P0234-OVERBOOST PERFORMANCE —
Continued
Symptom:
P0243-WASTEGATE SOLENOID CIRCUIT
When Monitored and Set Condition:
P0243-WASTEGATE SOLENOID CIRCUIT
When Monitored:
The ignition on or engine running. Battery voltage greater than 10
volts.
Set Condition:
The PCM will set the DTC if the actual state of the solenoid does not
match the intended state.
POSSIBLE CAUSES
GOOD TRIP EQUAL TO ZERO
WASTEGATE SOLENOID OPERATION
(Z1) WASTEGATE SOLENOID GROUND CIRCUIT
(K137) WASTE SOL CONTROL CIRCUIT SHORTED TO BATTERY VOLTAGE
(K137) WASTEGATE SOL CONTROL CIRCUIT OPEN
(K137) WASTEGATE SOL CONTROL CIRCUIT SHORTED TO GROUND
PCM
TEST
ACTION
APPLICABILITY
1
Ignition on, engine not running.
With the DRBIII
t, read PCM DTCs and record the related Freeze Frame data.
Is the Good Trip displayed and equal to zero?
All
Yes
→ Go To 2
No
→ Refer to the INTERMITTENT CONDITION symptom in the
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
2
Turn the ignition off.
Disconnect the Wastegate Solenoid harness connector.
Using a 12-volt test light, jumper across the Wastegate Solenoid harness connector.
NOTE: While actuating the solenoid wiggle the related wiring harness.
With the DRBIII
t, actuate the Wastegate Solenoid.
Does the test light illuminate brightly and flash on and off?
All
Yes
→ Replace the Wastegate Solenoid.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→ Go To 3
119
DRIVEABILITY - NGC
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the Wastegate Solenoid harness connector.
Using a 12-volt test light connected to battery voltage, probe the (Z1) Ground circuit
in the Wastegate harness connector.
Does the test light illuminate brightly?
All
Yes
→ Go To 4
No
→ Repair the (Z1) Ground circuit for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
4
NOTE: The Wastegate Sol Control circuit is a high side control circuit. When
the circuit is operating normally voltage will be present.
Turn the ignition off.
Disconnect the Wastegate Solenoid harness connector.
Disconnect the PCM harness connectors.
Turn the ignition on
Measure the voltage of the (K137) Wastegate Sol Control circuit in the Wastegate
Solenoid harness connector.
Does the voltmeter indicate any voltage present?
All
Yes
→ Repair the short to voltage in the (K137) Wastegate Sol Control
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→ Go To 5
5
Turn the ignition off.
Disconnect the Wastegate Solenoid harness connector.
Disconnect the PCM harness connectors.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the (K137) Wastegate Sol Control circuit from the
Wastegate Solenoid harness connector to the appropriate terminal of special tool
#8815.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 6
No
→ Repair the open in the (K137) Wastegate Sol Control circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
6
Turn the ignition off.
Disconnect the Wastegate Solenoid harness connector.
Disconnect the PCM harness connectors.
Measure the resistance between ground and the (K137) Wastegate Sol Control circuit
at the Wastegate Solenoid harness connector.
Is the resistance below 100 ohms?
All
Yes
→ Repair the short to ground in the (K137) Wastegate Sol Control
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→ Go To 7
120
DRIVEABILITY - NGC
P0243-WASTEGATE SOLENOID CIRCUIT —
Continued
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