Pinpoint Test F: DTC P07EC, P07ED

Refer to Transmission Controls for schematic and connector information.

Normal Operation and Fault Conditions

The rotary gear shift knob contains three internal contact switches under the center button. When the button is pressed, the 3 switches send a signal to the GSM. The GSM sets a DTC if the three switch signals do not agree, or if it detects a possible stuck switch.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
GSM P07EC:00	Transmission Range Multi-Function Select Circuit: No Sub Type Information	This DTC indicates one of the three contacts of the center button failed to agree with the other two contacts within 2 seconds.
GSM P07ED:00	Transmission Range Multi-Function Select Circuit Stuck: No Sub Type Information	This DTC sets if the GSM detects the center button has been pushed for more than 60 seconds.

Possible Sources

Debris or interference in the rotary gearshift center button.
GSM

F1 INSPECT GEAR SHIFT CENTER BUTTON
- Inspect the gearshift center button for debris or foreign materials that might cause binding or sticking.
Is any debris or foreign material present?

Yes CLEAN any debris or foreign material from the gearshift center button.

No GO to F2

F2 RETRIEVE AND RECORD ALL DTCS

NOTE: If a GSM self-test is carried out, the driver door must be fully closed and locked. A false P166B DTC can set if the driver door is not fully closed or if it is unlocked during the self-test.
- Ignition ON.
- Using a diagnostic scan tool, clear all DTCs.
- Ignition OFF.
- Ignition ON.
- Using a diagnostic scan tool, carry out the GSM self-test.
Is DTC P07EC or P07ED present?

Yes GO to F3

No The system is operating correctly at this time.

F3 CHECK GSM PID STATUS

NOTE: If a GSM self-test is carried out, the driver door must be fully closed and locked. A false P166B DTC can set if the driver door is not fully closed or if it is unlocked during the self-test.

Using a diagnostic scan tool, monitor the following PIDs:
- SBW_SLM_SW_1
- SBW_SLM_SW_2
- SBW_SLM_SW_3

Press and release the GSM center button while monitoring the PIDs.

Do all the switch PID readings change correctly as the center button is pressed and released?

Yes	CLEAR all GSM DTCs. CARRY OUT the GSM self-test. If DTC P07EC or P07ED returns, INSTALL a new GSM. REFER to: Gear Shift Module (GSM) .

GO to F4

F4 CHECK FOR CORRECT GSM (GEAR SHIFT MODULE) OPERATION

Ignition OFF.

Disconnect and inspect GSM C3532 and all related in-line electrical connectors.

Using a good light source, inspect all disconnected electrical connectors for the following:
- corrosion - install new connector or terminal and clean the module pins
- damaged or bent pins - install new terminals or pins
- pushed-out pins - install new pins as necessary
- spread terminals - install new terminals as necessary

Reconnect GSM C3532 and all related in-line electrical connectors. Make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable service articles: TSB, GSB (general service bulletin), SSM (special service message) or FSA (Field Service Action). If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles 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.