Chrysler Voyager. Manual — part 197

TEST

ACTION

APPLICABILITY

3

Turn the ignition off.
Disconnect the ATC C2 harness connector.
Measure the resistance between the Evaporator Temperature Sensor Signal circuit
and the Rear Blower Motor Control circuit.
Is the resistance below 10K ohms?

All

Yes

→ Repair the Evaporator Temperature Sensor Signal circuit for a

short to the Rear Blower Motor Control circuit.
With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 4

4

Turn the ignition off.
Disconnect the ATC C2 harness connector.
Measure the resistance between the Evaporator Temperature Sensor Signal circuit
and the Sensor Ground circuit. The approximate circuit resistance should be:
5,900 ohms @ 38°C (100°F).
6,600 ohms @ 35°C (95°F).
7,400 ohms @ 32°C (90°F).
8,300 ohms @ 29°C (85°F).
9,400 ohms @ 27°C (80°F).
10,600 ohms @ 24°C (75°F).
11,900 ohms @ 21°C (70°F).
13,500 ohms @ 18°C (65°F).
15,300 ohms @ 16°C (60°F).
17,500 ohms @ 13°C (55°F).
19,900 ohms @ 10°C (50°F).
22,800 ohms @ 7°C (45°F).
26,100 ohms @ 4°C (40°F).
30,000 ohms @ 2°C (35°F).
34,600 ohms @ -1°C (30°F).
Is the resistance within the specifications?

All

Yes

→ Replace the ATC in accordance with the Service Information.

With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 5

5

Turn the ignition off.
Disconnect the ATC C2 harness connector.
Disconnect the in-line C202 harness connector.
Measure the resistance of the Evaporator Temperature Sensor Signal circuit between
the ATC C2 harness connector and the in-line C202 harness connector.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 6

No

→ Repair the Evaporator Temperature Sensor Signal circuit be-

tween the ATC C2 harness connector and the in-line C202
harness connector (HVAC side) for an open.
With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

215

AUTOMATIC TEMPERATURE CONTROL

EVAP TEMP SENSOR OPEN (ACTIVE) —

Continued

TEST

ACTION

APPLICABILITY

6

Turn the ignition off.
Disconnect the ATC C2 harness connector.
Disconnect the in-line C202 harness connector.
Measure the resistance of the Sensor Ground circuit between the ATC C2 harness
connector and the in-line C202 harness connector.
Is the resistance below 5.0 ohms?

All

Yes

→ Check the wiring harness between the in-line C202 harness

connector (plenum side) and the Evap Temp Sensor for an open.
Repair as necessary. If Ok, replace the Evaporator Temperature
Sensor.
With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Repair the Sensor Ground circuit between the ATC C2 harness

connector and the in-line C202 harness connector (HVAC side) for
an open.
With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

216

AUTOMATIC TEMPERATURE CONTROL

EVAP TEMP SENSOR OPEN (ACTIVE) —

Continued

Symptom:

EVAP TEMP SENSOR SHORTED (ACTIVE)

When Monitored and Set Condition:

EVAP TEMP SENSOR SHORTED (ACTIVE)

When Monitored:

With the ignition on and the IOD fuse installed. Also, during the

Cooldown Test.

Set Condition:

This DTC is displayed if the ATC detects an abnormally low voltage on the

evaporator temperature sensor signal. Evap Temp Sensor Shorted is also displayed as a
Cooldown Test Message if the ATC detects an abnormally low voltage on the evaporator
temperature sensor signal during the Cooldown Test.

POSSIBLE CAUSES

EVAPORATOR TEMPERATURE SENSOR

EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO GROUND

EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO SENSOR GROUND CIR-
CUIT

ATC

TEST

ACTION

APPLICABILITY

1

Turn the ignition off.
Disconnect the in-line C202 harness connector.
Turn the ignition on.
With the DRBIII

t in Automatic Temperature Control, monitor Active DTCs.

Does the DRBIII

t display: Evap Sensor Open?

All

Yes

→ Check the Evap Temp Sensor Signal circuit between the in-line

C202 harness connector (plenum side) and the Evap Temp Sensor
for a short to ground. Repair as necessary. If Ok, replace the
Evaporator Temperature Sensor.
With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 2

2

Turn the ignition off.
Disconnect the ATC C2 harness connector.
Disconnect the in-line C202 harness connector.
Measure the resistance between ground and the Evaporator Temperature Sensor
Signal circuit (HVAC side).
Is the resistance above 100k ohms?

All

Yes

→ Go To 3

No

→ Repair the Evaporator Temperature Sensor Signal circuit be-

tween the ATC C2 harness connector and the in-line C202
harness connector (HVAC side) for a short to ground.
With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

217

AUTOMATIC TEMPERATURE CONTROL

TEST

ACTION

APPLICABILITY

3

Turn the ignition off.
Disconnect the ATC C2 harness connector.
Disconnect the in-line C202 harness connector.
Measure the resistance between the Evaporator Temperature Sensor Signal circuit
and the Sensor Ground circuit (HVAC side).
Is the resistance above 100k ohms?

All

Yes

→ Replace the ATC.

With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Repair the Evaporator Temperature Sensor Signal circuit be-

tween the ATC C2 harness connector and the in-line C202
harness connector (HVAC side) for a short to Sensor Ground.
With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

218

AUTOMATIC TEMPERATURE CONTROL

EVAP TEMP SENSOR SHORTED (ACTIVE) —

Continued