2004 - 2009 Cadillac XLR: Service Bulletin: #PIC5558: Additional Diagnosis For Folding Top Temperature Messages Displayed On The DIC - (Oct 3, 2011)
Estimated Reading Time: 1 Minutes#PIC5558: Additional Diagnosis For Folding Top Temperature Messages Displayed On The DIC - (Oct 3, 2011)
| Subject: | Additional Diagnosis For Folding Top Temperature Messages Displayed On The DIC |
| Models: | 2004 - 2009 Cadillac XLR |
| 2005 - 2012 Chevrolet Corvette with Power Folding Top (RPO CM7) |
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
- Condition/Concern:
-
On some occasions it may be found that the folding top is inoperative. A message on the Drivers Information Center (DIC) may read "Top Too Cold To Move" or "Top Motor Over Temp". You may also notice a DTC B3670 that is set in the Folding Top Control Module.
- Recommendation/Instructions:
-
If normal diagnosis leads to replacing the folding top pump assembly, disconnect the white dock-and-lock connector on the side of the pump. Using an ohm meter, check resistance across terminals B9 and B10 (Cadillac XLR) or terminals B7 and B8 (Chevrolet Corvette) on the pump side of the harness connector C431 (X431). Then record the resistance reading and compare to the chart below.
Celsius
Farenheit
Resistance (ohms)
-40
-32
5.32M
-30
-22
2.966M
-20
-4
1.74M
0
32
750000
20
68
263000
25
77
220000
30
86
179500
40
104
121300
50
122
83630
60
140
58710
70
158
41920
80
176
30410
85
185
26400
90
194
22390
95
203
19555
100
212
16720
110
230
12630
120
248
9663
130
266
7478
140
284
5851
150
302
4625
160
320
3691
170
338
2973
180
356
2415
190
374
1978
200
392
1632
210
410
1355
220
428
1132
230
446
952
240
464
806
250
482
686
260
500
587
270
518
506
280
536
437
290
554
380
300
572
332
If the top has only been operated one time, a message is displayed, and the thermistor is reading outside the normal range, the folding top pump will need to be replaced because the thermistor is not available separately.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.