Fixed P1516, producing P1307 and P1309 (AVCS) as chain reactions in the 2002 GG9 using the service manual diagnosis. The Idle-Air Control Solenoid (IACS) itself is already too clean but then there was some disconnection from the IACS connector to the ECU. We had to strip one of the concerned cables to test continuity to the connector. The cables were fine.
We were left with one place which is the B21 connector so we tested continuity to the IACS, they were all OK, then used a contact cleaner and reconnected it. The codes are now gone.
I installed T10 COB LEDs in the SG5, after receiving 12 pieces in the mail. I went with COBs for longevity and better-than-usual output vs SMDs.
New T10 COB vs old Narva T10
Incandescent T10 vs T10 COB LED vs Narva 10 LED
I have been running the incandescent and Narva T10 LED for quite some time now after the other T10 blew. I was told the mismatching was triggering OCD anxiety by passersby.
The Narva T10 produced around 5000K in colour temperature but is not as bright as the standard incandescent.
The COB T10 produced a much brighter but bluer output.
Incandescent T10 vs COB T10
COB T10 installed on both park lights.
They may not be used as DRLs but as park lights, they are perfect because they only consume 1W.