OBDII scan tool excluding Toyota handheld tester

START

START

PREPARATION:

Start the engine. CHECK:

Measure voltage between terminal ACT of ECM connector and body ground when A/C switch is turned to ON and OFF. OK:

A/C switch condition

Voltage

ON

9 - 14 V

OFF

Below 1.5 V

OK

Check and repair ECM. (See page IN-41)

2 Check for open and short in harness and connector between ECM and A/C amplifier. (See page IN-41)

Check and replace A/C amplifier.

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