The Air conditioner Control Module sets DTC B1688 when the voltage of the cluster ionizer's diagnosis circuit is lower than 2V.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Check Cluster Ionizer | 1. Poor connection in wiring harness 2. Open in power circuit. 3. Open in signal circuit 4. Open in ground circuit. 5. Short to ground in power circuit 6. Short to ground in signal circuit 7. Faulty Cluster Ionizer |
Enable Conditions |
•
IG KEY ON | |
Threshold value |
•
After IGN KEY ON, when the voltage keeps lower than 2V for more than 2 seconds | |
Failsafe |
•
The cluster ionizer does not run any more |
