Powertrain Controls - ECM/PCM

DTC 52 System Voltage High Long:

System Voltage:

CIRCUIT DESCRIPTION
CKT 440 is the battery feed for the Powertrain Control Module (PCM).

DTC 52 WILL SET WHEN
The ignition is "ON" and the PCM terminal "E16" voltage is greater than 16 volts for 109 minutes.

ACTION TAKEN (PCM WILL DEFAULT TO)
The Pressure Control Solenoid (PCS) is turned "OFF," 3-2 control solenoid is turned "OFF," transmission shifts immediately to third gear, and Torque Converter Clutch (TCC) operation will he inhibited. (The setting of additional diagnostic trouble codes may result.)

DTC 52 WILL CLEAR WHEN
Fault condition no longer exists, and the ignition switch is cycled "OFF" then "ON."

DTC CHART TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
1. This test checks that normal battery voltage is between 9-15 volts.
2. This test checks if the generator is faulty under load conditions. If the voltage is greater than 15 volts, refer to Starting and Charging. Starting and Charging

DIAGNOSTIC AIDS
^ CKT 440 supplies battery voltage to the PCM.
^ Charging the battery with a battery charger and jump-starting an engine may set DTC 52. If DTC(s) set when an accessory is operated, check for faulty connections or excessive current draw. Refer to Starting and Charging. Starting and Charging
^ Check for faulty connections at the starter solenoid or fusible link.