Content .. 95 96 97 98 ..

Chrysler RG Voyager. Manual - part 97

Symptom:

INVALID CONDITIONS FOR COOLDOWN TEST, EVAP TEMPERA-
TURE TOO LOW

When Monitored and Set Condition:

INVALID CONDITIONS FOR COOLDOWN TEST, EVAP TEMPERATURE TOO
LOW

When Monitored:

When executing the Cooldown Test.

Set Condition:

This message will be displayed if the A/C - Heater Control Module sees

evaporator temperature below 12.7°C (55°F) when executing the Cooldown Test.

POSSIBLE CAUSES

EVAPORATOR TEMPERATURE TOO LOW

ATC DTC(S) PRESENT

CHECK THE PCM/ECM FOR DTCS

ATC

EVAPORATOR TEMPERATURE SENSOR

TEST

ACTION

APPLICABILITY

CAUTION: The work area ambient temperature must be above 15.6°C (60°F)
to test A/C system operation.
Start the engine.
Turn the A/C off.
Turn the Blower on high. Allow the blower to run for 5 minutes to ensure that the
Evaporator Temperature Sensor temperature is above 12.7°C (55°F).
With the DRBIII

t, actuate the Cooldown Test.

Does the DRBIII

t display: Cooldown Test Too Cold To Start?

All

Yes

→ Go To 2

→ Perform additional testing as necessary.

Perform BODY VERIFICATION TEST - VER 1.

CAUTION: The work area ambient temperature must be above 15.6°C (60°F)
to test A/C system operation.
Turn the ignition on.
With the DRBIII

t, read ATC DTCs.

Does the DRBIII

t display any ATC DTCs?

All

Yes

→ Return to the symptom list and choose the symptom(s). After the

repair is complete, with the DRBIII

t, erase the DTC(s). Cycle the

ignition switch. With the DRBIII

t, reset the ATC. With the

DRBIII

t, actuate the Cooldown Test.

Perform BODY VERIFICATION TEST - VER 1.

→ Go To 3

357

AUTOMATIC TEMPERATURE CONTROL

TEST

ACTION

APPLICABILITY

CAUTION: The work area ambient temperature must be above 15.6°C (60°F)
to test A/C system operation.
Turn the ignition on.
With the DRBIII

t, check the PCM/ECM for DTCs.

Are any DTCs present?

All

Yes

→ Refer to the Powertrain Diagnostic information for the related

symptom(s). After the repair is complete, with the DRBIII

t, erase

the DTC(s). Cycle the ignition switch. With the DRBIII

t, reset the

ATC. With the DRBIII

t, accuate the Cooldown Test.

Perform BODY VERIFICATION TEST - VER 1.

No - RS Vehicles

Go To

No - RG Vehicles

Go To

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:
NOTE: The following specifications are for RS vehicles only.
1,468 ohms @ 40°C (104°F).
1,800 ohms @ 35°C (95°F).
2,221 ohms @ 30°C (86°F).
2,757 ohms @ 25°C (77°F).
3,443 ohms @ 20°C (68°F).
4,330 ohms @ 15°C (59°F).
5,485 ohms @ 10°C (50°F).
7,354 ohms @ 4°C (39°F).
8,130 ohms @ 2°C (36°F).
Is the resistance within the specifications?

All

Yes

→ Replace the ATC in accordance with the Service Information.

Perform BODY VERIFICATION TEST - VER 1.

→ Check the related ckts & connectors for conditions that would

cause a high resistance in the ckts. Repair as necessary. If Ok,
replace the Evap Temp Sensor in accordance with the Service
Information. After repair is complete, rerun the A/C Cooldown
Test.
Perform BODY VERIFICATION TEST - VER 1.

358

AUTOMATIC TEMPERATURE CONTROL

INVALID CONDITIONS FOR COOLDOWN TEST, EVAP TEMPERATURE
TOO LOW —

Continued

TEST

ACTION

APPLICABILITY

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:
NOTE: The following specifications are for RG vehicles only.
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.

Perform BODY VERIFICATION TEST - VER 1.

→ Check the related ckts & connectors for conditions that would

359

AUTOMATIC TEMPERATURE CONTROL

INVALID CONDITIONS FOR COOLDOWN TEST, EVAP TEMPERATURE
TOO LOW —

Continued

Symptom:

PASS BLEND DOOR NOT RESPONDING (ACTIVE)

When Monitored and Set Condition:

PASS BLEND DOOR NOT RESPONDING (ACTIVE)

When Monitored:

With the ignition on and the IOD fuse installed.

Set Condition:

This DTC is set if the ATC does not receive feedback pulses within 5

seconds of the drive voltage being applied.

POSSIBLE CAUSES

PASSENGER BLEND DOOR DRIVER CIRCUIT (A) SHORTED TO GROUND

PASSENGER BLEND DOOR DRIVER CIRCUIT (B) SHORTED TO GROUND

PASSENGER BLEND DOOR DRIVER CIRCUITS (A) AND (B) SHORTED TOGETHER

PASSENGER BLEND DOOR DRIVER CIRCUIT (A) OPEN

PASSENGER BLEND DOOR DRIVER CIRCUIT (B) OPEN

ATC

PASSENGER BLEND DOOR ACTUATOR

TEST

ACTION

APPLICABILITY

Turn the ignition off.
Disconnect the ATC C1 harness connector.
Measure the resistance between ground and the Passenger Blend Door Driver (A)
circuit.
Is the resistance above 100k ohms?

All

Yes

→ Go To 2

→ Repair the Passenger Blend Door Driver (A) circuit for a short to

ground.
With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

Turn the ignition off.
Disconnect the ATC C1 harness connector.
Measure the resistance between ground and the Passenger Blend Door Driver (B)
circuit.
Is the resistance above 100k ohms?

All

Yes

→ Go To 3

→ Repair the Passenger Blend Door Driver (B) circuit for a short to

ground.
With the DRBIII

t, reset the ATC after repair is complete.

Perform BODY VERIFICATION TEST - VER 1.

360

AUTOMATIC TEMPERATURE CONTROL

Content .. 95 96 97 98 ..