Symptom:
*HVAC SYSTEM TEST - MTC
POSSIBLE CAUSES
ATTEMPT TO COMMUNICATE WITH THE PCM/ECM, THE BCM, AND THE FCM
CHECK FOR HVAC RELATED DTCS IN THE PCM/ECM
CHECK FOR BCM DTCS
CHECK FOR FCM DTCS
CHECK FOR ACTIVE HVAC DTCS AND SYSTEM TESTS FAULT MESSAGES
CHECK FOR HVAC RELATED DTCS IN THE PCM/ECM
MANUAL A/C SYSTEM TEST
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t
, attempt to communicate with the Powertrain/Engine Control
Module.
With the DRBIII
t
, attempt to communicate with the Body Control Module.
With the DRBIII
t
, attempt to communicate with the Front Control Module.
Was the DRBIII
t
able to communicate with the PCM/ECM, the BCM, and the FCM?
All
Yes
→
Go To
2
No
→
Refer to the communication category for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
2
With the DRBIII
t
, read Powertrain/Engine Computer DTCs.
Are any HVAC related DTCs present?
All
Yes
→
Refer to the Powertrain Diagnostic Procedures Manual for the
related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
No
→
Go To
3
3
With the DRBIII
t
, read Body Computer DTCs.
Are any DTCs present?
All
Yes
→
Refer to the appropriate catagory for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
No
→
Go To
4
4
With the DRBIII
t
, read Front Control Module DTCs.
Are any DTCs present?
All
Yes
→
For FCM DTCs related to the blower relay circuits, refer to the
Heating & A/C catagory. For all other FCM DTCs, refer to the
symptom list in the related catagory.
Perform BODY VERIFICATION TEST - VER 1.
No
→
Go To
5
575
HEATING & A/C
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 ...
