Chrysler Voyager. Manual — part 66

Symptom:

P0116-ENGINE COOLANT TEMPERATURE PERFORMANCE

When Monitored and Set Condition:

P0116-ENGINE COOLANT TEMPERATURE PERFORMANCE

When Monitored:

Engine off time is greater than 480 minutes. Ambient temperature is

greater than 4°C (39°F).

Set Condition:

After a calibrated amount of cool down time, the PCM compares the ECT

Sensor, IAT Sensor and the Ambient Air Temperature Sensor values. If the ECT Sensor
value is not within 2°C (18°F) of the other two temperartue sensors an error is detected.
Two Trip Fault.

POSSIBLE CAUSES

GOOD TRIP EQUAL TO ZERO

(K2) ECT SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE

ECT SENSOR VOLTAGE BELOW 1.0 VOLT

(K2) ECT SIGNAL CIRCUIT OPEN

(K4) SENSOR GROUND CIRCUIT OPEN

(K2) ECT SIGNAL CIRCUIT SHORTED TO GROUND

(K2) ECT SIGNAL SHORTED TO (K4) SENSOR GROUND

PCM HIGH

PCM LOW

TEST

ACTION

APPLICABILITY

1

NOTE: Due to the fact that the PCM compares the IAT, AAT and ECT sensor
to see if they are within a calibrated temp of one another, the use of a block
heater can cause false readings for the PCM. Check with the customer to see
if they use a block heater.
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

No

→ Refer to the INTERMITTENT CONDITION symptom in the

Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.

263

DRIVEABILITY - NGC

TEST

ACTION

APPLICABILITY

2

Turn the ignition off.
Disconnect the ECT Sensor harness connector.
NOTE: Visually inspect both the component and the PCM connectors. Look
for damaged, partially broken wires, and backed out or corroded terminals.
Ignition on, engine not running.
Measure the voltage on the (K2) ECT Signal circuit in the ECT Sensor harness
connector.
Is the voltage above 5.2 volts?

All

Yes

→ Repair the short to battery voltage in the (K2) ECT Signal circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.

No

→ Go To 3

3

Turn the ignition off.
Disconnect the ECT Sensor harness connector.
Ignition on, engine not running.
With the DRBIII

t, read the ECT Sensor voltage.

Is the voltage above 4.6 volts?

All

Yes

→ Go To 4

No

→ Go To 7

4

Turn the ignition off.
Disconnect the ECT Sensor harness connector.
Using a jumper wire, jumper across the ECT Sensor harness connector.
Ignition on, engine not running.
With the DRBIII

t, read the ECT Sensor voltage.

Is the voltage below 1.0 volt?

All

Yes

→ Replace the ECT Sensor.

Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.

No

→ Go To 5

5

Turn the ignition off.
Disconnect the ECT 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 (K2) ECT Signal circuit from the ECT Sensor 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 (K2) ECT Signal circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.

264

DRIVEABILITY - NGC

P0116-ENGINE COOLANT TEMPERATURE PERFORMANCE —

Continued

TEST

ACTION

APPLICABILITY

6

Turn the ignition off.
Disconnect the ECT 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 ECT Sensor
harness connector to the appropriate terminal of special tool # 8815.
Is the resistance below 5.0 ohms?

All

Yes

→ NOTE: Before continuing, check the PCM harness connector

terminals for corrosion, damage, or terminal push out. Repair as
necessary. Replace and program the Powertrain Control Module
in accordance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.

No

→ Repair the open in the (K4) Sensor ground circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.

7

Disconnect the ECT Sensor harness connector.
Turn the ignition off.
Disconnect the PCM harness connector.
Measure the resistance between ground and the (K2) ECT Signal circuit in the ECT
Sensor harness connector.
Is the resistance below 100 ohms?

All

Yes

→ Repair the short to ground in the (K2) ECT Signal circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.

No

→ Go To 8

8

Turn the ignition off.
Disconnect the ECT Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance between the (K2) ECT Sensor Signal circuit and the (K4)
Sensor ground circuit at the ECT Sensor harness connector.
Is the resistance below 5.0 ohms?

All

Yes

→ Repair the (K4) Sensor ground shorted to the (K2) ECT Sensor

Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.

No

→ NOTE: Before continuing, check the PCM harness connector

terminals for corrosion, damage, or terminal push out. Repair as
necessary. Replace and program the Powertrain Control Module
in accordance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.

265

DRIVEABILITY - NGC

P0116-ENGINE COOLANT TEMPERATURE PERFORMANCE —

Continued

Symptom:

P0117-ENGINE COOLANT TEMPERATURE SENSOR LOW

When Monitored and Set Condition:

P0117-ENGINE COOLANT TEMPERATURE SENSOR LOW

When Monitored:

With the ignition on. Battery voltage greater than 10 volts.

Set Condition:

The Engine Coolant Temperature (ECT) sensor circuit voltage at the PCM

is less than 0.0782 of a volt. One Trip Fault.

POSSIBLE CAUSES

ECT SENSOR VOLTAGE BELOW 1.0 VOLTS

ECT SENSOR INTERNAL FAILURE

(K2) ECT SIGNAL SHORTED TO GROUND

(K2) ECT SIGNAL SHORTED TO (K4) SENSOR GROUND CIRCUIT

PCM

TEST

ACTION

APPLICABILITY

1

Ignition on, engine not running.
With the DRBIII

t, read the ECT Sensor voltage.

Is the voltage below 1.0 volt?

All

Yes

→ Go To 2

No

→ Refer to the INTERMITTENT CONDITION symptom in the

Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.

2

Turn the ignition off.
Disconnect the ECT harness connector.
Ignition on, engine not running.
With the DRBIII

t, read ECT Sensor voltage.

Is the voltage between 4.8 and 5.2 volts?

All

Yes

→ Replace the ECT Sensor.

Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.

No

→ Go To 3

3

Turn the ignition off.
Disconnect the ECT Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance between ground and the (K2) ECT Signal circuit in the ECT
Sensor harness connector.
Is the resistance below 100 ohms?

All

Yes

→ Repair the ground shorted to the (K2) ECT Signal circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.

No

→ Go To 4

266

DRIVEABILITY - NGC