Chrysler RG Voyager. Manual - part 405

TEST

ACTION

APPLICABILITY

Turn the ignition off.
Disconnect the generator harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, check the Fused ECM/PCM Relay
Output circuit.
Does the test light illuminate brightly?

All

Yes

→ Go To 12

→ Repair the Fused ECM/PCM Relay Output circuit for an open.

Perform CHARGING VERIFICATION - VER-3.

Turn the ignition off.
Disconnect the ECM harness connectors.
Remove Fuse 16 from the IPM.
Measure the resistance of the ECM/PCM Relay Output circuit between ECM harness
connector cavity C1-19 and the IPM at Fuse 16.
Is the resistance below 10.0 ohms?

All

Yes

→ Go To 13

→ Repair the ECM/PCM Relay Output circuit for high resistance.

Perform CHARGING VERIFICATION - VER-3.

Turn the ignition off.
Disconnect the ECM harness connectors.
Measure the resistance of the Ground circuit at ECM harness connector cavity C1-20.
Is the resistance below 5.0 ohms?

All

Yes

→ Replace and program the Engine Control Module in accordance

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

→ Repair the Ground circuit for high resistance.

Perform CHARGING VERIFICATION - VER-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.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, monitor the DRB
parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Review the DTC When Monitored and Set Conditions. If possible, try to duplicate the
conditions under which the DTC was set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?

All

Yes

→ Repair as necessary

Perform CHARGING VERIFICATION - VER-3.

→ Test Complete.

123

DRIVEABILITY - DIESEL

P0560-SYSTEM VOLTAGE TOO LOW —

Continued

Symptom:

P0579-S/C SWITCH SIGNAL CIRCUIT PLAUSIBILITY

POSSIBLE CAUSES

INTERMITTENT CONDITION

HIGH RESISTANCE IN THE S/C SWITCH SIGNAL CIRCUIT

HIGH RESISTANCE IN THE S/C SWITCH GROUND CIRCUIT

S/C SWITCHES

ENGINE CONTROL MODULE

TEST

ACTION

APPLICABILITY

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.
Test drive the vehicle and activate the Speed Control.
At some point during the test drive, actuate each of the S/C Switch buttons.
With the DRB, read ECM DTCs.
Did this DTC set again?

All

Yes

→ Go To 2

→ Go To 5

Turn the ignition off.
Disconnect the S/C Switch harness connectors.
Disconnect the ECM harness connectors.
Measure the resistance of the S/C Switch Signal circuit.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 3

→ Repair the S/C Switch Signal circuit for high resistance.

Perform SPEED CONTROL VERIFICATION - VER-4.

Turn the ignition off.
Disconnect the S/C Switch harness connectors.
Disconnect the ECM harness connectors.
Measure the resistance of the S/C Switch Ground circuit.
Is the resistance below 10.0 ohms?

All

Yes

→ Go To 4

→ Repair the S/C Switch Ground circuit for high resistance.

Perform SPEED CONTROL VERIFICATION - VER-4.

124

DRIVEABILITY - DIESEL

TEST

ACTION

APPLICABILITY

Turn the ignition off.
Replace the S/C Switches.
Turn the ignition on.
With the DRB, erase ECM DTCs.
Test drive the vehicle and activate the Speed Control.
At some point during the test drive, actuate each of the S/C Switch buttons.
Monitor the DRB for ECM DTCs.
Did this DTC set again?

All

Yes

→ Replace and program the Engine Control Module in accordance

with the Service Information.
Perform SPEED CONTROL VERIFICATION - VER-4.

→ The repair is complete.

Perform SPEED CONTROL VERIFICATION - VER-4.

All

Yes

→ Repair as necessary.

Perform SPEED CONTROL VERIFICATION - VER-4.

→ Test Complete.

125

DRIVEABILITY - DIESEL

P0579-S/C SWITCH SIGNAL CIRCUIT PLAUSIBILITY —

Continued

Symptom:

P0579-S/C SWITCH SIGNAL CIRCUIT SIGNAL VOLTAGE TOO
HIGH

POSSIBLE CAUSES

ECM - S/C SIGNAL CIRCUIT OPEN

ECM - S/C SIGNAL CIRCUIT SHORTED TO VOLTAGE

ECM - SENSOR GROUND OPEN

S/C ON/OFF/SET SWITCH

S/C ON/OFF/SET SWITCH SIGNAL CIRCUIT OPEN

S/C SWITCH SIGNAL CIRCUIT SHORTED TO VOLTAGE

SENSOR GROUND OPEN

TEST

ACTION

APPLICABILITY

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 off.
Disconnect the S/C ON/OFF/SET button harness connector.
Turn the ignition on.
Measure the voltage of the S/C Switch Signal circuit.
Select the appropriate voltage reading.

All

Below 4.5 volts.

Go To

Between 4.5 and 5.5 volts.

Go To

Above 5.5 volts

Go To

Turn the ignition off.
Disconnect the S/C ON/OFF/SET Switch harness connector.
Disconnect the ECM harness connectors.
Measure the resistance of the S/C Switch Signal circuit.
Is the resistance below 10.0 ohms?

All

Yes

→ Replace and program the Engine Control Module in accordance

with the Service Information.
Perform SPEED CONTROL VERIFICATION - VER-4.

→ Repair the S/C ON/OFF/SET Switch Signal circuit for an open.

Perform SPEED CONTROL VERIFICATION - VER-4.

126

DRIVEABILITY - DIESEL

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