Manual de instrucciones de Toyota p1600

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DI–133
DIAGNOSTICS – ENGINE
DI38N–03
DTC P1600 ECM BATT Malfunction
CIRCUIT DESCRIPTION
Battery positive voltage is supplied to terminal BATT of the ECM even when the ignition switch is OFF for
use by the DTC memory and air–fuel ratio adaptive control value memory, etc.
DTC No. DTC Detecting Condition Trouble Area
Open in back up power source circuit
P1600 Open in back up power source circuit
ECM
HINT:
If DTC P1600 appear, the ECM does not store another DTC.
WIRING DIAGRAM
ECM
Engine Room

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DI–134 DIAGNOSTICS – ENGINE 1 Check voltage between terminal BATT of ECM connector and body ground. PREPARATION: ON Remove the ECM cover. CHECK: BATT (+) Measure voltage between terminal BATT of the ECM connector and body ground. OK: Voltage 9 – 14 V OK Check and replace ECM (See page IN–30). A09084 A09092 NG 2 Check EFI fuse. PREPARATION: Engine Room J/B Remove the EFI fuse from the engine room J/B. CHECK: Check continuity of EFI fuse. OK: Continuity NG Check for short in all the harness and c