Pinpoint Test E: Internal Module DTCS

Normal Operation and Fault Conditions

The GSM runs periodic tests on itself. It sets a DTC if any of the results are outside of normal operating standards.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
GSM P0605:00	Internal Control Module Read Only Memory (ROM) Error: No Sub Type Information	This DTC indicates a ROM check sum error.
GSM P0606:00	Control Module Processor: No Sub Type Information	This DTC indicates the GSM experienced a reset without going through a proper sleep cycle.
GSM P0607:00	Control Module Performance: No Sub Type Information	This DTC indicates an early or delayed response of greater than 10 percent of its periodic rate.
GSM P06B8:00	Internal Control Module Non-Volatile Random Access Memory (NVRAM) Error: No Sub Type Information	This DTC indicates a RAM check sum error.
GSM P164E:00	Internal Control Module Transmission Range Select Performance: No Sub Type Information	This DTC indicates the GSM experienced a start up test failure, a program flow monitor failure, an IPC software failure, or a 5V_1_MONITOR failure.

Possible Sources

Discharged battery/charging system
GSM calibration
GSM

E1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS)
- Ignition ON.
- Retrieve all CMDTCs from the GSM.
Is DTC P0562 or P0563 present in the GSM?

Yes RESOLVE those DTCs first.

No GO to E2

E2 PROGRAM THE GSM (GEAR SHIFT MODULE) WITH THE LATEST SOFTWARE

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.

Clear all DTCs from the GSM.

Reprogram the GSM with the latest software. REFER to: Module Programming .

Using a diagnostic scan tool, carry out the GSM self-test.

Is DTC P0605, P0606, P0607, P06B8 and/or P164E present in the GSM?

Yes	INSTALL a new GSM. REFER to: Gear Shift Module (GSM) .

No	The fault is not present at this time. It may have been caused by a module programming error.