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TEST
ACTION
APPLICABILITY
3
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
→
Go To
4
4
Turn the ignition off.
Disconnect the Evaporator Temperature Sensor harness connector.
Turn the ignition on.
With the DRBIII
t
in Sensor Display, read the Evaporator Temperature Sensor
voltage.
Is the voltage above 4.9 volts?
All
Yes
→
Go To
5
No
→
Go To
6
5
Turn the ignition off.
Disconnect the Evaporator Temperature Sensor harness connector.
Connect a jumper wire between the Evaporator Temperature Sensor Signal circuit
and the Sensor Ground circuit at the Evaporator Temperature Sensor harness
connector.
Turn the ignition on.
With the DRBIII
t
in Sensor Display, read the Evaporator Temperature Sensor
voltage.
Is the voltage 0.0 volts?
All
Yes
→
Replace the Evaporator Temperature Sensor in accordance with
the Service Information. After the repair is complete, with the
DRBIII
t
, reset the ATC. With the DRBIII
t
, accuate the Cooldown
Test.
Perform BODY VERIFICATION TEST - VER 1.
No
→
Go To
6
6
NOTE: Ensure that the Evaporator Temperature Sensor harness connector
is connected to the Evaporator Temperature Sensor.
NOTE: Ensure that the voltmeter leads meet the terminals in the connector
and that there is good terminal to wire connection.
NOTE: Ensure the voltmeter leads are connected for positive polarity.
Back probe the Sensor Ground circuit between the Evaporator Temperature Sensor
harness connector and the ATC harness connector.
Turn the ignition on.
Is the voltage below 0.10 volt?
All
Yes
→
Go To
7
No
→
Repair the high resistance in the Sensor Ground circuit. After the
repair is complete, with the DRBIII
t
, reset the ATC. With the
DRBIII
t
, accuate the Cooldown Test.
Perform BODY VERIFICATION TEST - VER 1.
233
AUTOMATIC TEMPERATURE CONTROL
INVALID CONDITIONS FOR COOLDOWN TEST, EVAP TEMPERATURE
TOO LOW —
Continued
Summary of Contents for Caravan 2003
Page 24: ...NOTES xxiv ...
Page 64: ...NOTES 40 ...
Page 65: ...7 0 DIAGNOSTIC INFORMATION AND PROCEDURES 41 ...
Page 1080: ...C O N N E C T O R P I N O U T S 1056 CONNECTOR PINOUTS ...
Page 1119: ...10 2 2 BASE AUDIO SYSTEM S C H E M A T I C D I A G R A M S 1095 SCHEMATIC DIAGRAMS ...
Page 1123: ...10 3 3 FRONT ATC RHD S C H E M A T I C D I A G R A M S 1099 SCHEMATIC DIAGRAMS ...
Page 1125: ...10 4 COMMUNICATION S C H E M A T I C D I A G R A M S 1101 SCHEMATIC DIAGRAMS ...
Page 1130: ...10 6 EXTERIOR LIGHTING S C H E M A T I C D I A G R A M S 1106 SCHEMATIC DIAGRAMS ...
Page 1136: ...10 9 INTERIOR LIGHTING S C H E M A T I C D I A G R A M S 1112 SCHEMATIC DIAGRAMS ...
Page 1143: ...10 10 7 REAR BLOWER MOTOR S C H E M A T I C D I A G R A M S 1119 SCHEMATIC DIAGRAMS ...
Page 1145: ...10 11 MEMORY SYSTEM S C H E M A T I C D I A G R A M S 1121 SCHEMATIC DIAGRAMS ...
Page 1146: ...10 12 OVERHEAD CONSOLE S C H E M A T I C D I A G R A M S 1122 SCHEMATIC DIAGRAMS ...
Page 1147: ...10 13 POWER DOOR LOCKS RKE S C H E M A T I C D I A G R A M S 1123 SCHEMATIC DIAGRAMS ...
Page 1150: ...10 16 POWER LIFTGATE SYSTEM S C H E M A T I C D I A G R A M S 1126 SCHEMATIC DIAGRAMS ...
Page 1155: ...10 20 VEHICLE THEFT SECURITY SYSTEM S C H E M A T I C D I A G R A M S 1131 SCHEMATIC DIAGRAMS ...
Page 1157: ...10 21 WIPERS FRONT AND REAR S C H E M A T I C D I A G R A M S 1133 SCHEMATIC DIAGRAMS ...
Page 1158: ...NOTES 1134 ...
Page 1160: ...11 2 PCI BUS LAB SCOPE PATTERN C H A R T S A N D G R A P H S 1136 CHARTS AND GRAPHS ...