Chrysler RG Voyager. Manual — part 173
TEST
ACTION
APPLICABILITY
2
CAUTION: The evaporator temperature must be above 12.7°C (55°F) and the
work area ambient temperature must be above 21.1°C (70°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 Powertrain Diagnostic information for the related symp-
tom(s).
After repair is complete, rerun the Cooldown Test.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Refer to the Service Information for additional Cooldown Test
related diagnostic information and testing procedures.
After repair is complete, rerun the Cooldown Test.
Perform BODY VERIFICATION TEST - VER 1.
661
HEATING & A/C
COOLDOWN TEST SENSOR FAILURE - MTC —
Continued
Symptom:
COOLDOWN TEST TOO COLD TO START - MTC
When Monitored and Set Condition:
COOLDOWN TEST TOO COLD TO START - MTC
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
HVAC DTC(S) PRESENT
CHECK THE PCM/ECM FOR DTCS
A/C - HEATER CONTROL MODULE
A/C-HEATER CONTROL MODULE
EVAPORATOR TEMPERATURE SENSOR
TEST
ACTION
APPLICABILITY
1
CAUTION: The evaporator temperature must be above 12.7°C (55°F) and the
work area ambient temperature must be above 21.1°C (70°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
No
→ Perform additional testing as necessary.
Perform BODY VERIFICATION TEST - VER 1.
2
CAUTION: The evaporator temperature must be above 12.7°C (55°F) and the
work area ambient temperature must be above 21.1°C (70°F) to test A/C
system operation.
Turn the ignition on.
With the DRBIII
t, read HVAC DTCs.
Does the DRBIII
t display any HVAC 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, actuate the Cooldown Test.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
662
HEATING & A/C
TEST
ACTION
APPLICABILITY
3
CAUTION: The evaporator temperature must be above 12.7°C (55°F) and the
work area ambient temperature must be above 21.1°C (70°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 Powertrain Diagnostic information for the related symp-
tom(s). After the repair is complete, with the DRBIII
t, erase the
DTC(s). Cycle the ignition switch. With the DRBIII
t, actuate the
Cooldown Test.
Perform BODY VERIFICATION TEST - VER 1.
No - RS Vehicles
No - RG Vehicles
4
Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 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 A/C - Heater Control Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ 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 Cooldown Test.
Perform BODY VERIFICATION TEST - VER 1.
663
HEATING & A/C
COOLDOWN TEST TOO COLD TO START - MTC —
Continued
TEST
ACTION
APPLICABILITY
5
Turn the ignition off.
Disconnect the A/C-Heater Control 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 A/C-Heater Control Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ 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 Cooldown Test.
Perform BODY VERIFICATION TEST - VER 1.
664
HEATING & A/C
COOLDOWN TEST TOO COLD TO START - MTC —
Continued
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст