Chrysler Pacifica. Manual - part 374

TEST

ACTION

APPLICABILITY

Turn the ignition off.
Disconnect the A/C Pressure Sensor harness connector.
Turn the ignition on.
Measure the voltage on the (C18) A/C Pressure Sensor Signal circuit at the A/C
Pressure Sensor harness connector.
Is the voltage above 5.2 volts?

All

Yes

→ Repair the (C18) A/C Pressure Signal circuit for a short to battery

voltage.
Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.

→ Go To 4

Turn the ignition off.
Disconnect the A/C Pressure Sensor harness connector.
Connect a jumper wire between the (C18) A/C Pressure Signal circuit and the (K4)
Sensor ground circuit.
With the DRBIII

t, monitor the A/C Pressure Sensor voltage.

Turn the ignition on.
Is the voltage below 1.0 volt?

All

Yes

→ Replace the A/C Pressure Sensor.

Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.

→ Go To 5

Turn the ignition off.
Disconnect the A/C Pressure Sensor harness connector.
Disconnect the PCM harness connector.
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 (C18) A/C Pressure Sensor Signal circuit from the A/C
Pressure Sensor harness connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 6

→ Repair the (C18) A/C Pressure Signal circuit for an open.

Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.

Turn the ignition off.
Disconnect the A/C Pressure Sensor harness connector.
Disconnect the PCM harness connector.
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 (K4) Sensor ground circuit from the A/C Pressure
Sensor harness connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 7

→ Repair the (K4) Sensor ground circuit for an open.

Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.

217

DRIVEABILITY - NGC

P0533-A/C PRESSURE SENSOR HIGH —

Continued

TEST

ACTION

APPLICABILITY

NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
If there are no possible causes remaining, view repair.

All

Repair

Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.

218

DRIVEABILITY - NGC

P0533-A/C PRESSURE SENSOR HIGH —

Continued

Symptom:

P0562-BATTERY VOLTAGE LOW

When Monitored and Set Condition:

P0562-BATTERY VOLTAGE LOW

When Monitored:

Engine Running. RPM greater than 1152.

Set Condition:

The battery sensed voltage is 1 volt below the charging goal for 13.47

seconds. The PCM senses the battery voltage turns off the field driver and senses the
battery voltage again. If the voltages are the same, the code is set. One trip Fault.

POSSIBLE CAUSES

GOOD TRIP EQUAL TO ZERO

B+ CIRCUIT HIGH RESISTANCE

GENERATOR GROUND HIGH RESISTANCE

GENERATOR OPERATION

(Z1) GENERATOR FIELD GROUND CIRCUIT OPEN

(K20) GEN FIELD CONTROL CIRCUIT SHORTED TO GROUND

(K20) GEN FIELD CONTROL CIRCUIT OPEN

PCM

TEST

ACTION

APPLICABILITY

NOTE: Ensure the Battery is in good condition. Using the Midtronics
Battery Tester, test the Battery before continuing.
NOTE: Inspect the vehicle for aftermarket accessories that may exceed the
Generator System output.
Turn the ignition off.
NOTE: Ensure the generator drive belt is in good operating condition.
NOTE: Inspect the fuses in the PDC. If a fuse is found to be open use the
wiring diagram/schematic as a guide, inspect the wiring and connectors for
damage.
Ignition on, engine not running.
With the DRBIII

t, read DTCs and record the related Freeze Frame data.

Is the Good Trip Counter displayed and equal to zero?

All

Yes

→ Go To 2

→ Refer to the INTERMITTENT CONDITION symptom in the

Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 3 - NGC.

219

DRIVEABILITY - NGC

TEST

ACTION

APPLICABILITY

WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
Ignition on, engine not running.
NOTE: Ensure all wires are clear of the engine’s moving parts.
Measure the voltage between the Generator B+ Terminal and the Battery+ Post.
Start the engine.
Is the voltage above 0.4 of a volt?

All

Yes

→ Repair the B+ circuit for high resistance between the Generator

and Battery.
Perform POWERTRAIN VERIFICATION TEST VER - 3 - NGC.

→ Go To 3

WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
Start the engine.
Allow the engine to reach normal operating temperature.
NOTE: Ensure all wires are clear of the engine’s moving parts.
Measure the voltage between the Generator case and Battery ground post.
Is the voltage above 0.1 of a volt?

All

Yes

→ Repair Generator Ground for high resistance, Generator Case to

Battery ground side.
Perform POWERTRAIN VERIFICATION TEST VER - 3 - NGC.

→ Go To 4

Turn the ignition off.
Disconnect the Generator Field harness connector.
Using a 12-volt test light, jumper it across the Generator Field harness connector.
Ignition on, engine not running.
With the DRBIII

t, actuate the Generator Field Driver circuit.

Does the test light illuminate brightly and flash on and off?

All

Yes

→ Replace the Generator.

Perform POWERTRAIN VERIFICATION TEST VER - 3 - NGC.

→ Go To 5

Turn the ignition off.
Disconnect the Generator Field harness connector.
Using a 12-volt test connected to battery voltage, probe the Generator (Z1) Ground
circuit in the Generator Field harness connector.
Does the test light illuminate brightly?

All

Yes

→ Go To 6

→ Repair the open in the (Z1) Generator Field Ground circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 3 - NGC.

220

DRIVEABILITY - NGC

P0562-BATTERY VOLTAGE LOW —

Continued

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