Page 812 - Workshop Manual - Tunland (2017)

04-126 DIAGNOSTICS - ENGINE CONTROL SYSTEM

04 DTC inspection
DTC DTC definition Trouble location
conditions

Charging system
voltage - data is valid
P597 but below normal
operating range -
medium severity level

Charging system
voltage - data is valid
P598 but below normal
operating range -
highest severity level

Diagnosis Procedure

CAUTION

• To implement the following steps, ensure that ECM is grounded properly.
• Before conducting electric diagnosis, do refer to the reference circuit diagram
and the element information.
• Before conducting measurement, check the pins of connectors for rupture,
looseness and rust, and ensure that the pins are contacted properly.
• If the connection is good, check the sensor signal voltage when moving the
connector and harness. If a fault occurs, the voltage display on the diagnostic
instrument will change.

1 . DTC inspection
(a) Ignition switch: OFF.
(b) Connect the diagnostic apparatus.
(c) Use the diagnostic apparatus, read the fault code.
(d) Check whether there is fault code related to battery and charging system?
Is the inspection result normal?
YES>To step 2.

NO>Intermittent trouble exists.

2 . Check the battery connecting harness
(a) Ignition switch: OFF.
(b) Check whether the battery connecting harness is normal.

Is the inspection result normal?
YES>To step 3.

No > Maintain or replace the harness.

3 . Check battery
(a) Ignition switch: OFF.
(b) Disconnect the battery negative cable.