NO RESPONSE FROM ESM (ELECTRIC GEAR SHIFT MODULE)
 |
For a complete wiring diagram, refer to the Wiring Information.
Possible Causes |
|---|
| (Z910) GROUND CIRCUIT OPEN |
| (F1) IGNITION SWITCH OUTPUT (UNLOCK-RUN-START) CIRCUIT OPEN OR SHORTED |
| (D65) CAN C BUS (+) CIRCUIT OPEN |
| (D64) CAN C BUS (-) CIRCUIT OPEN |
| ELECTRIC GEAR SHIFT MODULE (SHIFT LEVER (NAG1) ASSEMBLY) |
1. TEST FOR INTERMITTENT CONDITION
| NOTE: | Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing. |
| 1. | Turn the ignition on. |
| NOTE: | Make sure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts. |
| 2. | With the scan tool, read the module status. |
| NOTE: | Check the TIPM for any active CAN hardware DTCs, perform DTC before proceeding. |
Does the scan tool indicate that the module is active on the bus?
Yes
- The no response condition is not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
No
- Go To 2
2. CHECK THE (Z910) GROUND CIRCUIT FOR AN OPEN
 |
| 1. | Turn the ignition off. |
| 2. | Disconnect the Shift Lever (NAG1) Assembly harness connector. |
| 3. | Using a 12-volt test light connected to 12-volts, check the (Z910) Ground circuit. |
Does the test light illuminate brightly?
Yes
- Go To 3
No
- Repair the open in the (Z910) Ground circuit.
-
Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM)
- Standard Procedure).
3. CHECK THE (F1) IGNITION SWITCH OUTPUT (UNLOCK-RUN-START) CIRCUIT FOR AN OPEN OR SHORT
 |
| 1. | Turn the ignition on. |
| 2. | Using a 12-volt test light connected to ground, check the (F1) Ignition Switch Output (Unlock-Run-Start) circuit. |
Does the test light illuminate brightly?
Yes
- Go To 4
No
- Repair the open or short in the (F1) Ignition Switch Output (Unlock-Run-Start) circuit.
-
Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM)
- Standard Procedure).
4. CHECK THE (D65) CAN C BUS (+) CIRCUIT FOR AN OPEN
 |
| 1. | Turn the ignition off. |
| 2. | Disconnect the TIPM C1 harness connector. |
| 3. | Measure the resistance of the (D65) CAN C Bus (+) circuit between the TIPM C1 harness connector and the Shift Lever (NAG1) Assembly harness connector. |
Is resistance below 5.0 Ohms?
Yes
- Go To 5
No
- Repair the open in the (D65) CAN C Bus (+) circuit.
-
Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM)
- Standard Procedure).
5. CHECK THE (D64) CAN C BUS (-) CIRCUIT FOR AN OPEN
 |
| 1. | Measure the resistance of the (D64) CAN C Bus (-) circuit between the TIPM C1 harness connector and the Shift Lever (NAG1) Assembly harness connector. |
Is resistance below 5.0 Ohms?
Yes
- Replace the Shift Lever (NAG1) Assembly in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).
No
- Repair the open in the (D64) CAN C Bus (-) circuit.
-
Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM)
- Standard Procedure).