Tacoma Extra Cab 4WD L4-2693cc 2.7L DOHC MFI (1997)
Control Module HVAC: Testing and Inspection
INSPECT AMPLIFIER CIRCUIT
1. Disconnect the amplifier connector and inspect the connector on wire harness side, as shown in the chart.
Test conditions:
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Ignition switch ON
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Temperature control lever MAX COOL
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Blower control lever HI
If circuit is as specified, try replacing the amplifier with a new one. If the circuit is not as specified, inspect the circuits connected to other parts.
2. Connect the connector to A/C amplifier and inspect wire harness side connector from the back side, as shown.
Test conditions:
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Ignition switch ON
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A/C switch ON
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Temperature control dial MAX COOL
-
Blower control lever HI
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Install manifold gauge set
If circuit is as specified, try replacing the amplifier with a new one. If the circuit is not as specified, inspect the circuits connected to other parts.