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Endgate Latch Release Inoperative

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Endgate Latch Release Inoperative

Step Action Yes No
Schematic Reference: Body Rear End Schematics 
Connector End View Reference: Body Rear End Connector End Views 
1 Did you perform the Body Rear End Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Body Rear End 
2 Verify that the endgate latch release is inoperative.
Does the endgate latch release operate normally?		 Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 3 
3
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, command the endgate module to Drop End Gate.
Does the endgate drop open?		 Go to Step 7  Go to Step 4 
4
  1. With a scan tool, observe the right upper latch and left upper latch parameters in the End Gate Module data list.
  2. Activate the drop latch.
Does the scan tool display Active?		 Go to Step 17  Go to Step 5 
5
  1. Disconnect the upper left and upper right endgate latch electrical connectors.
  2. Probe the endgate latch relay supply voltage circuit of the upper left endgate latch electrical connector with a test lamp that is connected to a good ground.
  3. Probe the endgate latch relay supply voltage circuit of the upper right endgate latch electrical connector with a test lamp that is connected to a good ground.
  4. With a scan tool, command the endgate module to Drop End Gate.
Does the test lamp illuminate?		 Go to Step 6  Go to Step 12 
6
  1. Connect a test lamp between the endgate latch relay supply voltage circuit and the upper left endgate latch actuator circuit of the upper left endgate latch electrical connector.
  2. Connect a test lamp between the endgate latch relay supply voltage circuit and the upper right endgate latch actuator circuit of the upper right endgate latch electrical connector.
  3. With a scan tool, command the endgate module to Drop End Gate.
Does the test lamp illuminate?		 Go to Step 18  Go to Step 13 
7 With a scan tool, command the endgate module to Swing End Gate.
Does the endgate swing open?		 Go to Step 11  Go to Step 8 
8
  1. With a scan tool, observe the right upper latch parameter in the End Gate Module data list.
  2. Activate the drop latch.
Does the scan tool display Active?		 Go to Step 17  Go to Step 9 
9
  1. Disconnect the upper left and lower left endgate latch electrical connectors.
  2. Probe the endgate latch relay supply voltage circuit of the upper left endgate latch electrical connector with a test lamp that is connected to a good ground.
  3. Probe the endgate latch relay supply voltage circuit of the lower left endgate latch electrical connector with a test lamp that is connected to a good ground.
  4. With a scan tool, command the endgate module to Swing End Gate.
Does the test lamp illuminate?		 Go to Step 10  Go to Step 12 
10
  1. Connect a test lamp between the endgate latch relay supply voltage circuit and the upper left endgate latch actuator circuit of the upper left endgate latch electrical connector.
  2. Connect a test lamp between the endgate latch relay supply voltage circuit and the lower left endgate latch actuator circuit of the lower left endgate latch electrical connector.
  3. With a scan tool, command the endgate module to Swing End Gate.
Does the test lamp illuminate?		 Go to Step 18  Go to Step 14 
11
  1. With a scan tool, observe the swing latch switch and drop latch switch parameters in the End Gate Module data list.
  2. Activate the swing latch and drop latch switches.
Does the scan tool display Inactive?		 Go to Step 15  Go to Step 17 
12 Test the endgate latch relay supply voltage circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 25  Go to Step 19 
13 Test the appropriate upper endgate latch actuator circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 25  Go to Step 17 
14 Test the appropriate left endgate latch actuator circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 25  Go to Step 17 
15 Test the appropriate endgate latch switch signal circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 25  Go to Step 16 
16 Test the appropriate endgate ajar switch low reference circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 25  Go to Step 20 
17 Inspect for poor connections at the harness connector of the endgate 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 25  Go to Step 21 
18 Inspect for poor connections at the harness connector of the appropriate endgate latch. 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 25  Go to Step 22 
19 Inspect for poor connections at the harness connector of the endgate latch relay. 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 25  Go to Step 23 
20 Inspect for poor connections at the harness connector of the appropriate latch 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 25  Go to Step 24 
21
  1. Perform the endgate window learn procedure. Refer to Window Learn Cycle - Endgate 
  2. Replace the endgate module. Refer to Module Rear Body Control Replacement - Endgate  .
Did you complete the replacement?		 Go to Step 25  -
22 Replace the appropriate endgate latch. Refer to Latch Replacement - Endgate Right Upper  , Latch Replacement - Endgate Left Upper  or Latch Replacement - Endgate Left Lower  .
Did you complete the replacement?		 Go to Step 25  -
23 Replace the endgate latch relay. Refer to Relay Replacement (Within an Electrical Center)Relay Replacement (Attached to Wire Harness) .
Did you complete the replacement?		 Go to Step 25  -
24 Replace the appropriate latch switch. Refer to Handle Replacement - Endgate  .
Did you complete the replacement?		 Go to Step 25  -
25 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 2 
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