Chrysler PT Cruiser. Manual - part 158

TEST

ACTION

APPLICABILITY

Turn the ignition off.
Disconnect the ECM harness connectors.
Remove the ASD Relay from the PDC.
Connect a jumper wire between cavity 30 and cavity 87 of the ASD Relay connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, check all of the ECM Battery Supply
and ASD Relay Output circuits including the Battery(+) Sense circuit.
Does the test light illuminate brightly for each circuit?

All

Yes

→ Go To 3

→ Repair the Battery Supply or ASD Relay Output circuit(s) for high

resistance.
Perform CHARGING VERIFICATION - VER-3.

Turn the ignition off.
Disconnect ECM harness connectors.
Disconnect the Generator Field harness connector.
Measure the resistance between ground and the Generator Field Control circuit.
Is the resistance above 1000 ohms?

All

Yes

→ Go To 4

→ Repair the Generator Field Control circuit for a short to ground.

Perform CHARGING VERIFICATION - VER-3.

Turn the ignition off.
Disconnect the Generator Field harness connector.
Measure the resistance between ground and the Generator Field Control terminal on
the back of the Generator.
Is the resistance above 1000 ohms?

All

Yes

→ Replace and program the Engine Control Module in accordance

with the Service Information.
Perform CHARGING VERIFICATION - VER-3.

→ Repair or replace the Generator as necessary.

Perform CHARGING VERIFICATION - VER-3.

112

DRIVEABILITY - DIESEL

P0560-SYSTEM VOLTAGE TOO HIGH —

Continued

Symptom List:

P0560-SYSTEM VOLTAGE TOO LOW
P1536-GENERATOR FIELD CURRENT TOO HIGH
*CHECKING THE CHARGING SYSTEM OPERATION

Test Note:

All symptoms listed above are diagnosed using the same tests.

The title for the tests will be P0560-SYSTEM VOLTAGE TOO
LOW.

When Monitored and Set Condition:

P0560-SYSTEM VOLTAGE TOO LOW

When Monitored:

With the engine running.

Set Condition:

The ECM detects battery voltage is below 10.0 volts.

P1536-GENERATOR FIELD CURRENT TOO HIGH

When Monitored:

With the engine running.

Set Condition:

The ECM detects the current on the Generator Field above 10.7 amps.

POSSIBLE CAUSES

INTERMITTENT CONDITION

GENERATOR BELT CONDITION OR TENSION

GENERATOR FIELD

HIGH RESISTANCE IN THE VOLTAGE SUPPLY CIRCUIT(S) TO THE ECM

GENERATOR FIELD CONTROL CIRCUIT SHORTED TO VOLTAGE

GENERATOR FUSED B+ CIRCUIT HIGH RESISTANCE

GENERATOR FIELD CONTROL CIRCUIT OPEN

GENERATOR FIELD CONTROL CIRCUIT SHORTED TO GROUND

GENERATOR GROUND CIRCUIT HIGH RESISTANCE

ASD RELAY OUTPUT CIRCUIT TO GENERATOR OPEN

BODY GROUND CIRCUIT OPEN

ENGINE CONTROL MODULE

HIGH RESISTANCE ON THE FUSED B+ CIRCUIT

HIGH RESISTANCE ON THE GROUND CIRCUIT

113

DRIVEABILITY - DIESEL

TEST

ACTION

APPLICABILITY

NOTE: If there are any Battery Sense DTCs (P1511 or P1512) present,
diagnose the Battery Sense DTCs first.
NOTE: Inspect the vehicle for aftermarket accessories that may exceed the
Generator capacity.
NOTE: The battery must be fully charged before continuing.
Inspect the generator belt condition and tension.
Were any problems found?

All

Yes

→ Go To 2

→ Repair as necessary.

Perform CHARGING VERIFICATION - VER-3.

NOTE: If the ECM detects and stores a DTC, the ECM also stores the
engine/vehicle operating conditions under which the DTC was set. Some of
these conditions are displayed on the DRB at the same time the DTC is
displayed.
NOTE: Before erasing stored DTCs, record these conditions. Attempting to
duplicate these conditions may assist when checking for an active DTC.
Turn the ignition on.
With the DRB, erase ECM DTCs.
Start the engine several times. Allow the engine to run for at least 30 seconds each
run cycle while turning the ignition off for at least 10 seconds between each run cycle.
Monitor the DRB for ECM DTCs.
Did this DTC set again?

All

Yes

→ Go To 3

→ Go To 14

Connect the positive lead of a voltmeter to the generator B+ (12V) terminal and the
negative lead to the battery positive (+) post.
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.
Is the voltage on the voltmeter below 0.4 volt?

All

Yes

→ Go To 4

→ Repair the Generator Fused B+ circuit for high resistance.

Perform CHARGING VERIFICATION - VER-3.

Connect the positive lead of a voltmeter to the generator case (housing) and the
negative lead to the battery negative (-) post.
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.
Is the voltage on the voltmeter below 0.4 volt?

All

Yes

→ Go To 5

→ Repair the Generator Ground circuit for high resistance.

Perform CHARGING VERIFICATION - VER-3.

114

DRIVEABILITY - DIESEL

P0560-SYSTEM VOLTAGE TOO LOW —

Continued

TEST

ACTION

APPLICABILITY

Turn the ignition off.
Measure the voltage between the body and the negative battery terminal.
Is the voltage below 0.4 volt?

All

Yes

→ Go To 6

→ Repair the Body Ground circuit for an open.

Perform CHARGING VERIFICATION - VER-3.

Turn the ignition off.
Disconnect the Generator Field harness connector.
Measure the resistance of the Field Control terminals on the back of the Generator.
Is the resistance between 2 and 6 ohms?

All

Yes

→ Go To 7

→ Repair or replace the Generator as necessary.

Perform CHARGING VERIFICATION - VER-3.

Turn the ignition off.
With a voltmeter, measure and record the voltage between the Battery terminals.
Disconnect the ECM harness connectors.
Remove the ASD Relay from the PDC.
Connect a jumper wire between cavity 30 and cavity 87 of the ASD Relay connector.
Turn the ignition on.
Measure the voltage of the ASD Relay Output circuits and Battery(+) Sense circuit in
the ECM C1 harness connector.
Are all voltage measurements within 0.5 volt of each other?

All

Yes

→ Go To 8

→ Repair the circuit that had high resistance.

Perform CHARGING VERIFICATION - VER-3.

Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Generator Field harness connector.
Remove the ASD Relay from the PDC.
Connect a jumper wire between cavity 30 and cavity 87 of the ASD Relay connector.
Turn the ignition on.
Measure the voltage of the Generator Field Control circuit.
Is the voltage below 1.0 volt?

All

Yes

→ Go To 9

→ Repair the Generator Field Control circuit for a short to voltage.

Perform CHARGING VERIFICATION - VER-3.

All

Yes

→ Go To 10

→ Repair the Generator Field Control circuit for a short to ground.

Perform CHARGING VERIFICATION - VER-3.

115

DRIVEABILITY - DIESEL

P0560-SYSTEM VOLTAGE TOO LOW —

Continued

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