DTC 1-3-2

1-3-2 BATTERY VOLTAGE




Trouble Code Conditions
If battery voltage exceeds 16.0 volts (voltage too high) or lies below 8.0 volts (voltage too low) after engine has started, Diagnostic Trouble Code (DTC) 1-3-2 is set.

Substitute value(s)
- None.

Fault source(s)
Voltage too high:
- System overcharging battery.

Voltage too low:
- Poor battery.
- System undercharging battery.
- Contact resistance in terminals.

Fault symptom(s)
- None.

TEST PROCEDURE




STATUS REPORT

NOTE: To obtain a correct status report, read off DTC with engine running.

^ Permanent fault, voltage too high:
- Proceed to: PERMANENT FAULT, VOLTAGE TOO HIGH section below.

^ Permanent fault, voltage too low:
- Proceed to: PERMANENT FAULT, VOLTAGE TOO LOW section below.

^ Intermittent fault, voltage too high:
- Proceed to: INTERMITTENT FAULT, VOLTAGE TOO HIGH section below.

^ Intermittent fault, voltage too low:
- Proceed to: INTERMITTENT FAULT, VOLTAGE TOO LOW section below.

PERMANENT FAULT, VOLTAGE TOO HIGH
Check charging system
- Check charging system for high charging voltage.




PERMANENT FAULT, VOLTAGE TOO LOW
Check battery voltage
- Start engine and allow to idle.
- Connect a voltmeter between battery positive and negative terminals.

Voltmeter should read 12 - 15 volts.

If value OK:
^ Check lead between battery and ECM # 18 for contact resistance and oxidation.

If value differs:
^ Check charging system for low charging voltage.

INTERMITTENT FAULT, VOLTAGE TOO HIGH
Change voltage regulator
- Test with new voltage regulator.




INTERMITTENT FAULT, VOLTAGE TOO LOW
Check leads and connections
- Check ECM and main relay connector, battery and generator connections for loose connection, as well as contact resistance and oxidation.
- Check lead between battery and ECM # 18 for contact resistance and oxidation.