DTC 09:ER20
DTC 09:Er20 Power supply circuit of base unit
DETECTION
CONDITION
• Voltage detected at base unit terminals 1B and 1R is less than 8.5 V , or
more than 16 V (must not be 16V) .
POSSIBLE CAUSE
• Weak battery
• Malfunction in wiring harness between battery and base unit
Diagnostic procedure
STEP INSPECTION ACTION
Yes Go to the next step.
1
Remove the ROOM 15 A fuse and ACC
7.5 A fuse.
Are the fuses normal?
No Replace the fuse.
Yes Go to the next step.
2
Measure the battery voltage.
Is the voltage between 8.5
16 V ?
No
Battery malfunction
o Inspect the charge/discharge system.
3 Yes Go to the next step.
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