The A/C control module sets DTC B1688 If the voltage of the cluster ionizer's diagnosis line is lower than 1.5V for more than 2 secondsseconds.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Voltage check | 1. Poor contact in harness 2. Open or short in power circuit 3. Open or short in Signal circuit 4. Open or short in ground circuit 5. Cluster Ionizer |
Enable Conditions |
•
Ignition "ON" | |
Threshold value |
•
If the voltage of the cluster ionizer's diagnosis line is lower than 1.5V for more than 2 secondsseconds. | |
Failsafe |
•
Ion as Clean Signal Cut-off |
