P1607-PCM INTERNAL SHUTDOWN TIMER SLOW RATIONALITY

For a complete wiring diagram Refer to Section 8W.

When Monitored:
Continuously.
Set Condition:
The PCM has detected an interruption in the supplied battery voltage while the module is powered down. Two Trip Fault. Three good trips to turn off the MIL.

Possible Causes

INTERMITTENT DTC

PENDING TEMPERATURE SENSOR DTCS

LOW BATTERY VOLTAGE TO MODULE

(F202) FUSED IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT OPEN OR HIGH RESISTANCE

(A931) FUSED B+ CIRCUIT OPEN OR HIGH RESISTANCE

POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - STANDARD PROCEDURE).

Diagnostic Test

1.PENDING TEMPERATURE SENSOR DTCS

NOTE: If any temperature sensor DTCs are present, allow the vehicle to cool completely before proceeding with this test.

Are there any pending Engine Coolant Temperature sensor, Ambient Air Temperature sensor, or general temperature DTCs?

Yes

Diagnose and repair any temperature sensor DTCs and retest.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

Go to 2

2.DTC IS ACTIVE

Is the good trip counter greater than 0?

Yes

The DTC is not active at this time. Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

Go to 3

3.LOW BATTERY VOLTAGE AT PCM

NOTE: A loss of battery voltage to the module while the module is powered down is the most likely cause of this DTC.

Were any problems found?

Yes

Repair as necessary.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

Go to 4

4.(F202) FUSED IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT OPEN OR HIGH RESISTANCE

NOTE: The test light should be illuminated and bright with the ignition switch in the ON and START positions. Compare the brightness to that of a direct connection to the battery.

Does the test light illuminate, or not illuminate, as expected in each of the ignition switch positions?

Yes

Go to 5

Repair the circuit as necessary. If an open fuse is found, inspect the circuit for a short to ground.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

5.(A931) FUSED B+ CIRCUIT OPEN OR HIGH RESISTANCE

NOTE: The test light should be illuminated and bright regardless of the position of the ignition switch. Compare the brightness to that of a direct connection to the battery.

Is the test light illuminated and bright in each of the ignition switch positions?

Yes

Go to 6

Repair the circuit as necessary.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

6.POWERTRAIN CONTROL MODULE (PCM)

Were any problems found?

Yes

Repair as necessary.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).