Pinpoint Test S : DTCS P07EC, P07ED
WARNING: This page is about a different variant/trim than selected.
- Normal Operation and Fault Conditions
The GSM contains 3 contacts beneath the center button. If one contact is not recognized by the GSM then DTC P07EC sets.
DTC Fault Trigger Conditions
DTC Description Fault Trigger Condition GSM P07EC:00 Transmission Range Multi-Function Select Circuit: No Sub Type Information This DTC sets in continuous memory if two Brake Transmission Shift Interlock (BTSI) override switch inputs do not change state. A message is displayed on the message center warning that a given range is unavailable. GSM P07ED:00 Transmission Range Multi-Function Select Circuit Stuck: No Sub Type Information A DTC P07ED can be set in "History", if the Center Button is held down for 30 seconds or more. If DTC P07ED is set in continuous' memory continue with the diagnostics. The GSM contains 3 contacts beneath the center button. If two or more contacts report 'closed' for 30 seconds or more, the GSM then sets DTC P07ED. Possible Sources
- Connectors damaged or pushed-out terminals, circuitry open, shorted to power or shorted to ground
- Brake transmission shift interlock override switch
- BCM fuse 15 (7.5A)
- GSM
- S1 RETRIEVE AND RECORD ALL DTCSNOTE: If a GSM self-test is performed, the driver door must be closed and locked. A false P166B and/or P081F DTC sets if the driver door is opened or unlocked during the self-test.
- Ignition ON.
- Using the diagnostic scan tool, clear all DTCs.
- Wait for 2 minutes and perform GSM self-test.
- Using the diagnostic scan tool, retrieve all DTCs.
Are DTCs P07EC and/or P07ED present?
Yes GO to S2 No System is operating correctly at this time, concern may be intermittent. - S2 CHECK THE BRAKE TRANSMISSION SHIFT INTERLOCK OVERRIDE SWITCH FOR STICKING
- Using the diagnostic scan tool, observe the PID GSM_BTSI_OVRRD.
- Press and release the brake transmission shift interlock override switch.
Does the PID GSM_BTSI_OVRRD switch from No to Yes?
Yes GO to S3 No GO to Pinpoint Test A - S3 CHECK THE GSM CENTER BUTTON FOR STICKING
- Using the diagnostic scan tool, observe the PIDs SBW_SLM_SW_1, SBW_SLM_SW_2, SBW_SLM_SW_3.
- Ignition ON.
- Press and release the GSM center button.
Do the PIDs SBW_SLM_SW_1, SBW_SLM_SW_2, SBW_SLM_SW_3 show all 3 center switches switching from No to Yes and back to No when the button is released?
Yes GO to S4 No CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new GSM. REFER to: Gear Shift Module (GSM) . - S4 CHECK FOR CORRECT GSM (GEAR SHIFT MODULE) OPERATION
- Ignition OFF.
- Disconnect and inspect all GSM connectors.
- Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary
- Reconnect the GSM connectors. Make sure they seat and latch correctly.
- Operate the system and verify the concern is still present
Is the concern still present?
Yes CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new GSM. REFER to: Gear Shift Module (GSM) . No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.