EXPORT IQ PLUS CHARGER (EXTERNAL)
Troubleshooting
2008 Export Battery Charger Maintenance and Service Manual
Page 5-11
5
EXPORT IQ PLUS BATTERY CHARGER TROUBLESHOOTING GUIDE
SYMPTOM
POSSIBLE CAUSES
CORRECTIVE ACTION
Relay does not close, no transformer
hum and ammeter does not move
Batteries disconnected
Connect batteries.
See
Figure 5-9,
Page 5-16
Battery voltage is too low
Test Procedure 1 – Battery Voltage and
DC Plug and Receptacle on page 5-14
Poor connection between plug and
receptacle
Test Procedure 1 – Battery Voltage and
DC Plug and Receptacle on page 5-14
DC plug and cord
Test Procedure 1 – Battery Voltage and
DC Plug and Receptacle on page 5-14
and Test Procedure 5 – Charger DC
Circuit Continuity Test on page 5-20
Onboard computer malfunction
Test Procedure 2 – Onboard Computer on
page 5-17
Gray sense lead fuse is blown (not
applicable to Precedent vehicles)
Test Procedure 1 – Battery Voltage and
DC Plug and Receptacle on page 5-14
Receptacle fuse link is blown (not
applicable to Precedent vehicles)
See Electrical Components section in the
appropriate maintenance and service
manual
Poor connection at 10-gauge black wire or
18-gauge gray wire at the OBC
(applicable to Precedent vehicles only)
Check wire connections
Relay closes with an audible click but
no transformer hum and ammeter does
not move
Improper AC outlet voltage
Test Procedure 3 – AC Power and
Continuity Test of AC Circuit on page 5-17
Failed AC plug and cord
Test Procedure 3 – AC Power and
Continuity Test of AC Circuit on page 5-17
Internal AC breaker
Test Procedure 3 – AC Power and
Continuity Test of AC Circuit on page 5-17
Transformer primary coil
Test Procedure 6 – Transformer on
page 5-20
Relay
Test Procedure 8 – Continuity on
page 5-22
Failed ammeter
Replace ammeter
Relay closes and transformer hums but
ammeter does not move
Blown charger fuse
Test Procedure 5 – Charger DC Circuit
Continuity Test on page 5-20
Both diodes failed
Test Procedure 4B – Both Diodes Failed
on page 5-19
Onboard computer malfunction
Test Procedure 2 – Onboard Computer on
page 5-17
Failed transformer or voltage switch
Test Procedure 6 – Transformer on
page 5-20
Relay operates intermittently
Failed charger relay
Test Procedure 8 – Continuity on
page 5-22
Single charger fuse link blows
Diode failed
Test Procedure 4A – Single Diode Failure
on page 5-18
Loose internal fuse connection
Tighten connection
Troubleshooting Guide continued on next page...