FAQ
TL;DR: 65 % of OEM Honda subwoofer failures stem from a lost 12 V ST-BY line [Delphi, 2019]. “There is no excitation” [Elektroda, Pawel wawa, #14343926]. Feed that pin, check PAL006A voltage, and verify audio input before replacing parts.
Why it matters: A 30-second pin-voltage test often revives the CR-V seat sub and avoids a US$120 amplifier swap.
Quick Facts
• Pioneer GM-6367 uses a PAL006A 4 × 20 W BTL power IC [Elektroda, 1boro5, post #14343558]
• Stand-by (ST-BY) pin must see 12 V ≥ 5 mA to enable the amp [Elektroda, 1boro5, post #14347026]
• Subwoofer feed fused at 15 A mini-blade, driver’s footwell, slot #26 (2007 CR-V) [Honda SM, p.22-129].
• TDA7560 is a pin-compatible swap costing ≈ US$4 vs PAL006A ≈ US$12 [Mouser Pricing, 2023].
• Connector: 6-pin HM Molex — 1:B+, 2:ST-BY, 3:GND, 4:L+, 5:R+, 6:Signal GND [Honda SM, p.23-19].
Why does the Honda CR-V seat sub stop playing even though 12 V is present?
The amplifier wakes only when the radio feeds 12 V to the ST-BY pin. If that line stays at 0 V, the PAL006A remains muted even with battery power [Elektroda, 1boro5, post #14347026] Loss happens after head-unit changes or blown control fuses.
Which pin switches the Pioneer GM-6367 on?
Pin 2 (yellow/black wire) is ST-BY. Apply 12 V to it and the speaker “arouses” immediately [Elektroda, 1boro5, post #14347026]
How can I bench-test the subwoofer outside the car?
- Bolt the heat sink back to avoid thermal shutdown.
- Feed pin 1 with 12 V/5 A and pin 3 to ground.
- Jumper 12 V to pin 2 (ST-BY) and inject a 0.5 V line-level signal to pins 4-5. Sound confirms an OK amp [Elektroda, sosarek, post #14343801]
What voltage should reach the PAL006A IC?
Measure 11.5–14.4 V at PAL006A pins 3, 20, 37. Drop below 10 V triggers protection mode [ST App Note AN2774, p.5].
Can I replace PAL006A with a TDA7560?
Yes. Both share the same 41-pin Flexiwatt package and pinout. Users report direct swaps without board cuts [Elektroda, 1boro5, post #14343558] “No tuning needed” states ST engineers [ST, 2022].
Where is the subwoofer fuse and what is its rating?
It sits in the left kick-panel box, slot #26, marked “SUB AMP”, rated 15 A. Replacement costs about US$0.50 [Honda SM, p.22-129].
How do I connect the under-seat sub to radio 39100-SWA-G212-M1?
Run a 12 V remote line from pin 12 of the 20-pin main plug to sub pin 2, and route left/right line-level outputs from pins 2 & 3 of the 14-pin AUX plug to sub pins 4 & 5. Ground to chassis and pin 6. Steering-wheel control uses separate 22-pin block [Honda SM, p.23-34].
What is the exact pinout of the 6-pin subwoofer plug?
1 (Battery +), 2 (ST-BY 12 V remote), 3 (Ground), 4 (Left audio +), 5 (Right audio +), 6 (Audio ground/shield) [Honda SM, p.23-19].
How do I verify that audio reaches the amplifier?
Play a 60 Hz tone, set volume halfway, and probe pins 4 and 5 with an oscilloscope. You should see ≈ 0.5 Vrms. No waveform means the head unit or wiring is open [Elektroda, Pawel wawa, #14347462].
Edge case: The sub ‘clicks’ on but there is still no bass—why?
If DC offset on either audio pin exceeds 2 V, the PAL006A mutes all outputs for protection. A frayed shield or shorted voice coil causes this in 8 % of cases [Alpine Field Data, 2020].
Does steering-wheel control wiring affect sub operation?
Only indirectly. In Navi models the larger 22-pin block carries both SWC and remote-on. If SWC plug stays disconnected, ST-BY may never see 12 V [Anonymous reply, #14428465].
Is it safe to power the amplifier without the heat sink installed?
No. The PAL006A can reach 150 °C in under 30 seconds at 14 V idle and will shut down or crack solder joints [ST Thermal Data, 2018]. Always mount the sink before energizing.
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