Component Location
General Description

Many control units have applied to vehicle as it becomes more eletrolnical. These units control their own system based on information from diverse sensors. Therefore necessity of common use of diverse sensor information and importance of stable power supply are gathering strength. Battery sensor is mounted on battery (-) terminal. It transmits battery voltage, current, temperature information to PCM. PCM controls generating voltage by duty cycle based on these signals

DTC Description

PCM sets this code when there is difference between battery voltage at power supply terminal of PCM and the voltage from battery senor.

DTC Detecting Condition

Item

Detecting Condition

Possible cause

DTC Strategy

•

Signal Monitoring

1.

Open or short in harness

2.

Faulty battery sensor

3.

Poor connection

Enable Conditions

•

IG "ON".

Threshold value

•

There is difference between battery voltage at power supply terminal of PCM and the voltage from battery senor

Diagnosis Time

•

Continuous

MIL On Condition

•

NO MIL ON (DTC only)

Diagnostic Circuit Diagram
note
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Signal Waveform & Data

Fig 1) Normal waveforms of IG, L terminal of alternator during charge warning lamp is ON

Fig 2) Normal waveforms of IG, L terminal of alternator during charge warning lamp is OFF

Fig 3) Normal waveforms of COM, FR terminal of alternator at idle

Fig 4) Normal waveforms of COM, FR terminal of alternator under connector disconnected condition

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