DTC 1-3-2

1-3-2 BATTERY VOLTAGE

Preconditions for DTC
^ If battery voltage is lower than 8 Volts (signal too low) or higher than 16 Volts (signal too high) after the engine has started, DTC 1-3-2 is set.

Substitute value
^ EVAP diagnosis shut off.
^ Diagnosis for Heated Oxygen Sensor ageing shut off.

Fault source
^ Poor battery.
^ The charge system does not recharge sufficiently, or overcharges.
^ Contact resistance in connectors.

Fault symptoms
^ None

TESTING PROCEDURE





Status Message
^ Check current status message.

If Status message is: Permanent fault, voltage too high:
- Proceed to: PERMANENT FAULT, VOLTAGE TOO HIGH section below.
If Status message is: Permanent fault, voltage too low:
- Proceed to: PERMANENT FAULT, VOLTAGE TOO LOW section below.
If Status message is: Intermittent fault, voltage too high:
- Proceed to: INTERMITTENT FAULT, VOLTAGE TOO HIGH section below.
If Status message is: Intermittent fault, voltage too low:
- Proceed to: INTERMITTENT FAULT, VOLTAGE TOO LOW section below.

PERMANENT FAULT, VOLTAGE TOO HIGH

Checking the Charging System
^ Check the charging system for signs of excessively high voltage charge.

PERMANENT FAULT, VOLTAGE TOO LOW





Checking the Battery Voltage
^ Engine RUNNING at idling speed.
^ Connect a voltmeter between the battery's positive and negative terminals.

The voltmeter should show 12 - 15 Volts.

If reading is OK:
- Check the lead between the battery and ECM A27 for signs of contact resistance and oxidation.
If reading is incorrect:
- Check the charging system for insufficient charge voltage.

INTERMITTENT FAULT, VOLTAGE TOO HIGH

Test with a New Charge Regulator
^ Test with a new charge regulator.

INTERMITTENT FAULT, VOLTAGE TOO LOW





Checking the Leads And Connectors
^ Check the ECM's and main relay's connectors and the battery's and generator's connectors for signs of loose connection and contact resistance and oxidation.
^ Check the lead between the battery and ECM A27 for signs of contact resistance and oxidation.