DTC 16

Code 16 Chart:

Wiring Diagram:

CIRCUIT DESCRIPTION
The PCM monitors battery or system voltage on CKT 439 to terminal "P5". If the PCM detects voltage above 17.3 volts or below 9 volts for more than 10 seconds, it will turn the SES "ON" and set Code 16 in memory.


TEST DESCRIPTION
Numbers below refer to circled numbers on the diagnostic chart.

1. Test generator output to determine proper operation of the voltage regulator. Run engine at moderate speed and measure voltage across the battery. If over 17 volts or below 9 volts, repair generator.

DIAGNOSTIC AIDS:

^ An intermittent may be caused by a poor connection, rubbed through insulation, a wire broken inside the insulation or poor PCM grounds.

^ Poor Connection or Damaged Harness. Inspect PCM harness connector for backed out terminal "B5," improper mating, broken locks, improperly formed or damaged terminals, poor terminal to wire connection and damaged harness. Also check for a bad PCM ground at the ignition module bracket.


^ Intermittent Test. If connections and harness checks OK, monitor battery voltage display while moving related connectors. If the failure is induced, the battery voltage will abruptly change. This may help to isolate the location of the malfunction. An engine stall while manipulating the harness indicates that the PCM has lost voltage at terminal "B5". Check for loose connectors in CKT 440.

NOTE: Charging battery with a battery charger and starting the engine may set a Code 16.