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B102F–REAR BLEND REQUEST INPUT CIRCUIT HIGH (ATC) (CONTINUED) 6. CHECK REAR BLEND CONTROL Check the Rear Blend control in the Rear A/C Heater Control as follows: Turn the Rear Blend control on the Rear A/C Heater Control to the full hot position. Measure the resistance between the Rear Blend Supply terminal and the Rear Blend Sense terminal in the Rear Slowly rotate the Rear Blend control from full hot to full cold while observing the DVOM. The reading should change Measure the resistance between the Rear Blend Supply terminal and the Rear Blend Return terminal in the Rear Slowly rotate the Rear Blend control from full cold to full hot while observing the DVOM. The reading should remain With the Rear Blend control in full hot, measure the resistance between the Rear Blend Sense terminal and the Slowly rotate the Rear Blend control from full hot to full cold while observing the DVOM. The reading should change Are the resistance readings as specified? Yes >> Replace the A/C Heater Control in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. No >> Replace the Rear A/C Heater Control in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. HB HVAC - ELECTRICAL DIAGNOSTICS 24 - 21 |