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HEATING & A/C
EVAP TEMP SENSOR OPEN (ACTIVE) —
TEST
3
Turn the ignition off.
Disconnect the ATC C1 harness connector.
Measure the resistance between the Evaporator Temperature Sensor Signal circuit
and the Rear Booster Fan Control circuit.
Is the resistance below 10K ohms?
Yes → Repair the Evaporator Temperature Sensor Signal circuit for a
→ Go To 4
No
4
Turn the ignition off.
Disconnect the ATC C1 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?
Yes → Replace the Automatic Temperature Control (ATC) in accordance
→ Go To 5
No
5
Turn the ignition off.
Disconnect the ATC C1 harness connector.
Disconnect the in-line C202 harness connector.
Measure the resistance of the Evaporator Temperature Sensor Signal circuit between
the ATC C1 harness connector and the in-line C202 harness connector (IP Side).
Is the resistance below 5.0 ohms?
Yes → Go To 6
→ Repair the Evaporator Temperature Sensor Signal circuit be-
No
ACTION
short to the Rear Booster Fan Control circuit.
Perform BODY VERIFICATION TEST - VER 1.
with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
tween the ATC C1 harness connector and the in-line C202
harness connector (IP side) for an open.
Perform BODY VERIFICATION TEST - VER 1.
Continued
522
APPLICABILITY
All
All
All
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