Dodge Dakota (R1). Manual — part 823
Symptom:
P1594-CHARGING SYSTEM VOLTAGE TOO HIGH
When Monitored and Set Condition:
P1594-CHARGING SYSTEM VOLTAGE TOO HIGH
When Monitored:
With the ignition key on and the engine speed greater than 0 RPM.
Set Condition:
When the PCM regulates the generator field and there are no detected
field problems, but the voltage output does not decrease.
POSSIBLE CAUSES
AMBIENT/BATT TEMPERATURE SENSOR
GENERATOR FIELD DRIVER CIRCUIT SHORTED TO GROUND
GENERATOR FIELD SHORTED TO GROUND
AMBIENT/BATT TEMPERATURE SENSOR
POWERTRAIN CONTROL MODULE (BATTERY VOLTAGE)
POWERTRAIN CONTROL MODULE (GENERATOR RESISTANCE)
TEST
ACTION
APPLICABILITY
1
Ignition on, engine not running.
With the DRBIII
t, actuate the Generator Field Driver.
With a 12-volt test light, backprobe the Generator Field Driver Circuit in back of
Generator.
Did the light blink?
All
Yes
→
No
→
2
Ignition on, engine not running.
With the DRBIII
t, actuate the Generator Field Driver.
With DRBIII
t, stop the Generator Field Driver actuation.
With DRBIII
t, read the Target Charging voltage.
Is the Target Charging voltage above 0 volts?
All
Yes
→
No
→
3
Start the engine.
Manually set the engine speed to 1600 RPM.
With DRBIII
t, read both the Battery voltage and the Target Charging voltage.
Compare the
9Target Voltage9 to the 9Battery Voltage9 reading.
Monitor voltage for 5 minutes, if necessary. Look for a 1.0 volt difference or more.
Was there more than a 1.0 volt difference?
All
Yes
→
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 3.
No
→
Test Complete.
24
CHARGING
TEST
ACTION
APPLICABILITY
4
Ignition on, engine not running.
.With the DRBIII
t in Inputs/Outputs, read the AMBIENT/BATT temperature.
Using a thermometer measure under hood temperature near Battery tray.
Is the temperature within 10 deg of Battery temperature?
All
Yes
→
No
→
Replace AMBIENT/BATT Temperature Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 3.
5
If there are no possible causes remaining.
Press Continue to view repair options.
All
Continue
Replace Powertrain AMBIENT/BATT TEMP SENSOR.
Perform POWERTRAIN VERIFICATION TEST VER - 3.
6
Turn the ignition off.
Disconnect the PCM harness connector(s).
Disconnect the Generator Field harness connector.
Measure the Generator Field Driver Circuit from PCM harness connector to ground.
Is the resistance below 5.0 ohms?
All
Yes
→
Repair the Generator Field Driver Circuit shorted to ground.
Perform POWERTRAIN VERIFICATION TEST VER - 3.
No
→
7
Turn the ignition off.
Disconnect the Field Harness Connector at back of the Generator.
Note: Check connectors - Clean/repair as necessary.
Measure resistance of the Generator Field Driver Circuit at the Generator to Ground.
Is the resistance below 5.0 ohms?
All
Yes
→
Repair or replace the shorted Generator as necessary.
Perform POWERTRAIN VERIFICATION TEST VER - 3.
No
→
8
If there are no possible causes remaining, view repair.
All
Repair
Replace the Powertrain Control Module.
Perform POWERTRAIN VERIFICATION TEST VER - 3.
25
CHARGING
P1594-CHARGING SYSTEM VOLTAGE TOO HIGH —
Continued
Symptom:
P1682-CHARGING SYSTEM VOLTAGE TOO LOW
When Monitored and Set Condition:
P1682-CHARGING SYSTEM VOLTAGE TOO LOW
When Monitored:
With the ignition key on and the engine running over 1500 RPM after
25 seconds.
Set Condition:
When the PCM regulates the generator field and there are no detected
field problems, but the voltage output does not increase.
POSSIBLE CAUSES
AMBIENT/BATT TEMPERATURE SENSOR
B (+) CIRCUIT HIGH RESISTANCE
GENERATOR GROUND HIGH RESISTANCE
GENERATOR FIELD DRIVER CIRCUIT OPEN
GENERATOR FIELD DRIVER CIRCUIT SHORTED TO GROUND
GENERATOR FIELD SOURCE CIRCUIT SHORTED TO GROUND
GENERATOR FIELD SOURCE (+) CIRCUIT OPEN
PCM
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
Note: Battery must be fully charged.
Note: Generator Belt tension and condition must be checked before con-
tinuing.
Start the engine.
With theDRBIII
t, read the target charging voltage.
Is the target charging voltage above 15.1 volts?
All
Yes
→
No
→
2
Turn the ignition off.
Note: Battery must be fully charged.
Note: Generator Belt tension and condition must be checked before con-
tinuing.
Start the engine. Allow the engine to reach normal operating temperature.
With the DRBIII
t in sensors, read the AMBIENT/BAT TMP DEG.
Using a Thermometer, measure under hood temperature.
Is the temperature within 10 F degrees of Battery temperature?
All
Yes
→
No
→
26
CHARGING
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the AMBIENT/BATT harness Connector.
Note: Check connectors - Clean/repair as necessary.
Connect a jumper across the Terminals of the AMBIENT/BATT (harness side).
Ignition on, engine not running.
With the DRBIII
t in sensors, read the AMBIENT/BAT VOLT.
Is the voltage reading equal to zero?
All
Yes
→
Replace the AMBIENT/BATT temperature sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 3.
No
→
4
Ignition on, engine not running.
Record all DTC’s and freeze frame data, now erase Codes.
Carefully inspect all Connectors for corrosion or spread Terminals before continuing.
With the DRBIII
t actuate the Generator Field Driver Circuit.
Backprobe the Generator Field Source (+) Circuit at back of Generator.
Is the voltage above 10.0 volts?
All
Yes
→
No
→
Repair the open Generator Field Source (+) Circuit from Gener-
ator.
Perform POWERTRAIN VERIFICATION TEST VER - 3.
5
Turn the ignition off.
Disconnect the PCM harness connectors.
Disconnect the Generator Field harness connector.
Note: Check Connectors - Clean/repair as necessary.
Measure the Generator Field Driver Circuit from PCM to Generator.
Is the resistance below 5.0 ohms?
All
Yes
→
No
→
Repair the open Generator Field Driver Circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 3.
6
Turn the ignition off.
Disconnect the PCM harness connector(s).
Disconnect the generator field harness connector.
Measure the Generator Field Source Circuit from PCM harness connector to ground.
Is the resistance below 5.0 ohms?
All
Yes
→
Repair the Generator Field Source Circuit shorted to ground and
replace PCM.
Perform POWERTRAIN VERIFICATION TEST VER - 3.
No
→
7
Turn the ignition off.
Disconnect the PCM harness connector(s).
Disconnect the Generator Field harness connector.
Measure the Generator Field Driver Circuit from PCM Connector to ground.
Is the resistance below 5.0 ohms?
All
Yes
→
Repair the Generator Field Driver Circuit shorted to ground.
Perform POWERTRAIN VERIFICATION TEST VER - 3.
No
→
27
CHARGING
P1682-CHARGING SYSTEM VOLTAGE TOO LOW —
Continued
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст