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DTC 19

BHE070201038W15

DTC 19 | Air mix actuator (potentiometer) system inspection
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POSSIBLE CAUSE | • Air mix actuator malfunction • Open circuit in wiring harness between A/C amplifier and air mix actuator • Short circuit in wiring harness between A/C amplifier (terminal 2H) and air mix actuator (terminal E)

Diagnostic Procedure

STEP | INSPECTION | ACTION
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1 | • Inspect the air mix actuator. (See AIR MIX ACTUATOR INSPECTION.) • Is it normal? | Yes | Go to the next step.
No | Replace the air mix actuator. (See AIR MIX ACTUATOR REMOVAL/INSTALLATION.)
2 | • Disconnect the A/C amplifier connector (16-pin) and the air mix actuator connector. • Is there an open circuit in the wiring harness between the following terminals of the A/C amplifier connector (16-pin) and the air mix actuator connector? – 2O-A – 2H-E – 2P-C | Yes | Repair the wiring harness.
No | Go to the next step.
3 | • Is there a short circuit to ground in the wiring harness between A/C amplifier connector (16-pin) terminal 2H and air mix actuator connector terminal E? | Yes | Repair the wiring harness.
No | The system is normal at present. (Clear the past malfunction from memory.)