Diagnostic Aids
| • | When using the scan tool, the folding top cover is referenced as the tonneau. |
| • | If a repair is made to a signal circuit for a short to ground, test the component of that circuit for proper operation. |
| • | Removing the tonneau release relay will set a DTC and stop power folding top operation. Once the relay is replaced, the ignition must be cycled OFF then Run ACCY in order to continue operation. |
| • | Using the scan tool to access the History parameters for the folding top control (FTC) module, will display the last status of the items listed. |
Test Description
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This step verifies the open or closed position of the power folding top.
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This step verifies that the body control module (BCM) is applying battery voltage to the control circuit of the tonneau release relay. Removing the tonneau release relay will set DTC B3637 causing the BCM to disable output control of the relay until the ignition is cycled OFF/Run ACCY. After the test lamp is connected in place of the relay, the ignition must be cycled OFF/Run ACC in order for this step to be a valid test.
Step | Action | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Power Roof Systems Component Views Connector End View Reference: Power Roof Systems Connector End Views Important: This diagnostic table is to be used only in conjunction with other diagnostic procedures in this section. Using this diagnostic table without being directed to its use, may result in the misdiagnoses of the power folding top system. | |||||||||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information | ||||||
2 | Verify that the folding top folding top cover latch actuator or folding top cover pull down actuator inoperative complaint is present. Does the folding top cover latch actuator and folding top cover pull down actuator systems operate as described in the system description and operation? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 | ||||||
3 | Does the folding top cover pull down actuator continuously move up and down? | Go to Step 4 | Go to Step 5 | ||||||
4 | Is the folding top cover in the open position? | Go to Step 30 | Go to Step 11 | ||||||
5 | During the folding top operation when the sequence is reached for the folding top cover to open, did the folding top cover unlatch? | Go to Step 7 | Go to Step 6 | ||||||
Is the folding top in the open position? | Go to Step 12 | Go to Step 15 | |||||||
7 | During folding top operation, after the folding top cover released and opened, did the folding top cover pull down actuator extend to the up position? | Go to Step 8 | Go to Step 23 | ||||||
8 | During the folding top operation when the folding top cover closed, did the folding top cover latch? | Go to Step 9 | Go to Step 10 | ||||||
9 | During folding top operation, after the folding top cover closed, did the folding top cover pull down actuator retract to the down position? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 22 | ||||||
10 |
Does the test lamp illuminate? | Go to Step 26 | Go to Step 35 | ||||||
11 |
Does the Power Pull Down Ajar Status parameter display Ajar? | Go to Step 28 | Go to Step 36 | ||||||
12 | With a scan tool, observe the Top Open Limit Switch parameter in the Folding Top Module Inputs data list. Does the Top Open Limit Switch parameter display Active? | Go to Step 15 | Go to Step 13 | ||||||
13 |
Does the test lamp illuminate? | Go to Step 14 | Go to Step 37 | ||||||
14 |
Does the Top Open Limit Switch parameter display Active? | Go to Step 31 | Go to Step 25 | ||||||
15 | With a scan tool, observe the Tonneau Latch Switch parameter in the Folding Top Module Inputs data list. Does the Tonneau Latch Switch parameter display Ajar? | Go to Step 16 | Go to Step 17 | ||||||
16 |
Does the Tonneau Latch Sw. parameter display Ajar? | Go to Step 27 | Go to Step 35 | ||||||
17 |
Does the test lamp illuminate? | Go to Step 18 | Go to Step 38 | ||||||
Does the test lamp illuminate when the relay is commanded ON? | Go to Step 19 | Go to Step 33 | |||||||
19 | Connect a 3-amp fused jumper wire between the battery positive voltage circuit of the tonneau release relay connector and the folding top cover latch actuator control circuit of the relay connector. Did the folding top cover unlatch? | Go to Step 34 | Go to Step 20 | ||||||
20 |
Does the test lamp illuminate? | Go to Step 21 | Go to Step 39 | ||||||
21 |
Does the test lamp illuminate? | Go to Step 35 | Go to Step 41 | ||||||
22 |
Did the folding top cover pull down actuator retract to the down position? | Go to Step 35 | Go to Step 23 | ||||||
23 |
Does the test lamp illuminate? | Go to Step 24 | Go to Step 40 | ||||||
24 | Connect the test lamp between the battery positive voltage circuit of the pull down actuator connector and the ground circuit of the pull down actuator connector. Does the test lamp illuminate? | Go to Step 29 | Go to Step 42 | ||||||
25 | Test the signal circuit of the top open switch for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 49 | Go to Step 32 | ||||||
26 | Test the folding top cover latch actuator control circuit, between the tonneau release relay and the folding top cover latch actuator, for a short battery voltage. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 49 | Go to Step 34 | ||||||
27 | Test the folding top cover latch ajar signal circuit for a short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 49 | Go to Step 33 | ||||||
28 | Test the folding top cover pull down ajar signal circuit for a short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 49 | Go to Step 33 | ||||||
29 | Test the pull down actuator control circuit, between the folding top cover latch actuator and the folding top cover pull down actuator, for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 49 | Go to Step 30 | ||||||
30 | Test the pull down actuator control circuit, between the folding top cover latch actuator and the folding top cover pull down actuator, for a short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 49 | Go to Step 36 | ||||||
31 | Inspect for poor connections at the harness connector of the top open switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 49 | Go to Step 43 | ||||||
32 | Inspect for poor connections at the harness connector of the folding top control (FTC) module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 49 | Go to Step 44 | ||||||
33 | Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 49 | Go to Step 45 | ||||||
34 | Inspect for poor connections at the harness connector tonneau release relay. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 49 | Go to Step 46 | ||||||
35 | Inspect for poor connections at the harness connector folding top cover latch actuator. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 49 | Go to Step 47 | ||||||
36 | Inspect for poor connections at the harness connector of the folding top cover pull down actuator. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 49 | Go to Step 48 | ||||||
37 | Repair the open in the accessory voltage circuit of the top open switch. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 49 | -- | ||||||
38 | Repair the short to ground or open in the battery positive voltage circuit of the tonneau release relay. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 49 | -- | ||||||
39 | Repair the short to ground or open in the control circuit of the folding top cover latch actuator. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 49 | -- | ||||||
40 | Repair the short to ground or open in the battery positive voltage circuit of the folding top cover pull down actuator. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 49 | -- | ||||||
41 | Repair the open in the ground circuit of the folding top cover latch actuator. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 49 | -- | ||||||
42 | Repair the open in the ground circuit of the folding top cover pull down actuator. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 49 | -- | ||||||
43 | Replace the top open switch. Refer to Power Folding Top Limit Switches Replacements . Did you complete the replacement? | Go to Step 49 | -- | ||||||
44 | Replace the FTC module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 49 | -- | ||||||
45 | Replace the BCM. Refer to Control Module References in Computer/Integrating Systems. Did you complete the replacement? | Go to Step 49 | -- | ||||||
46 | Replace the tonneau release relay. Did you complete the replacement? | Go to Step 49 | -- | ||||||
47 | Replace the folding top cover latch actuator. Refer to Folding Top Cover Lid, Latch, Actuator Replacement . Did you complete the replacement? | Go to Step 49 | -- | ||||||
48 | Replace the folding top cover pull down actuator. Refer to Folding Top Stowage Compartment Lid Latch Striker Replacement . Did you complete the replacement? | Go to Step 49 | -- | ||||||
49 |
Did you correct the condition? | System OK | Go to Step 2 | ||||||
