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Automatic Temperature Controller Does Not Operate When Ignition Is ON

WARNING: This page is about a different car, the 2006 Suzuki Verona. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Automatic Temperature Controller Circuit Diagram
G04720090Courtesy of SUZUKI OF AMERICA CORP.
DIAGNOSTIC PROCEDURE

Step Action Value(s) Yes No
1 Check the fuse F12.
Is fuse F12 blown?		 - Go to Step 2 Go to Step 3
2 Replace fuse F12.
Is the repair complete?		 - System OK -
3
  1. Remove the controller.
  2. Measure the voltage between connectors A5 and A14.

Is the voltage within the specified value?		 11 - 14 V Go to Step 4 Go to Step 5
4
  1. Check the controller for damage.
  2. Replace the controller if it is damaged.

Is the repair complete?		 - System OK -
5 Check the voltage between terminal A1 and ground.
Is this voltage as specified?		 0 V Go to Step 6 Go to Step 7
6
  1. Check the wiring harness between fuse F12 and the terminal A5 for damage.
  2. Replace the wiring harness if it is damaged.

Is the repair complete?		 - System OK -
7
  1. Check the wiring harness between terminal A14 and ground G205 for damage.
  2. Repair the wiring harness, or ground connection as required.

Is the repair complete?		 - System OK -
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