| CHECK AUTO A/C CONTROL MODULE SIGNAL VOLTAGE. |
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1) Turn the ignition switch to ON. 2) Turn the air flow control dial and measure the voltage between auto A/C control module harness connector and chassis ground for each mode. Connector & terminal (i48) No. 4 (+) — Chassis ground (−): |
| QUESTION | |
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Is the voltage approx. 5 V at the HEAT, D/H and DEF positions, and approx. 0 V at the VENT and BI-LEVEL positions? | |
| Yes | No |
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