Pinpoint Test G: Internal Module Diagnostic Trouble Codes (DTCS)
- Normal Operation and Fault Conditions
The GSM carries out 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 GSM program and calibration ROM checksum error. The GSM will prevent shifting from park for the rest of the operation cycle. GSM P0606:00 Control Module Processor: No Sub Type Information This DTC indicates an unintended GSM reset while the ignition was on. GSM P0607:00 Control Module Performance: No Sub Type Information This DTC indicates an early or delayed execution of a GSM task by 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 GSMRAM checksum error. GSM P164E:00 Internal Control Module Transmission Range Select Performance: No Sub Type Information This DTC indicates an internal GSM software or hardware malfunction. When this DTC is set, the GSM is put into a safe state and all GSM can messages are considered invalid. The IPC will inhibit improper range changes, and make sure park is engaged when park is selected. Possible Sources
- Discharged battery/charging system
- GSM calibration
- GSM
- G1 CHECK THE BATTERY CONDITION AND STATE OF CHARGE
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NOTE: If necessary connect a battery charger to the vehicle battery to make a steady battery voltage is available while performing this test. Refer to .
Carry out the battery condition test. REFER to: Battery . BATTERY CHARGING
Did the battery pass the condition test?
Yes GO to G2 No CHARGE or INSTALL a new battery as necessary. REFER to: Battery . -
- G2 CHECK THE GSM (GEAR SHIFT MODULE) FOR CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)
- Ignition ON.
- Retrieve all continuous memory diagnostic trouble codes (CMDTCs) from the GSM.
Is DTC P0562 or P0563 present in the GSM '
Yes RESOLVE those diagnostic trouble codes (DTCs) first. REFER to Diagnostic Trouble Code (DTC) Chart . No GO to G3 - G3 PROGRAM THE GSM (GEAR SHIFT MODULE) WITH THE LATEST CALIBRATIONNOTE: If a GSM self-test is carried out, the driver door must be fully closed. A false P166B DTC may set if the driver door is not fully closed during the self-test.
- Ignition ON.
- Clear all diagnostic trouble codes (DTCs) from the GSM.
- Reprogram the GSM with the latest calibration. REFER to: Module Configuration - System Operation and Component Description .
- Road test the vehicle.
- Ignition OFF.
- Ignition ON.
- Using a diagnostic scan tool, carry out the GSM self-test.
Is DTC P0605, P0606, P0607, P06B8 or P164E present in the GSM '
Yes GO to G4 No The fault is not present at this time. It may have been caused by a module programming error. - G4 CHECK FOR CORRECT GSM (GEAR SHIFT MODULE) OPERATION
- Ignition OFF.
- Disconnect and inspect the GSM connector.
- 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
- Connect the GSM connector. Make sure it seats and latches correctly.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes CHECK for an applicable TSB, GSB, SSM, or FSA. If a service bulletin exists for this concern, discontinue this test and follow bulletin instructions. If none 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.