STEP 5. Wiring harness check between the D-117 rear height sensor
connector terminal No. 1/2/3 and the C-112 headlamp automatic levelling ECU
connector terminal No. 16/18/20.
Check the power supply lines, earth lines and communication lines for open
circuit.
note
Before the wiring harness check, check the intermediate connectors C-131 and D-116, and
then repair that if necessary.
Q.
Is the check result normal?
Go to Step 6.
Repair the wiring harness.
STEP 6. Check whether the diagnosis code is reset.
Q.
Is diagnosis code No.21 set?
Replace the headlamp automatic levelling ECU.
The trouble, such as a poor connector connection from the rear height sensor to headlamp
automatic levelling ECU or an open circuit of wiring harness, can be an intermittent malfunction
(Refer to GROUP 00 -
How to use Troubleshooting/inspection Service Points -
How
to cope with Intermittent Malfunction ).