D15D15B 2008366HONDA MOTOR CO. // P08

GARAGE REFERENCE // PRINTABLE

Harness & Vacuum Map.

The whole nervous system on one page: every ECU branch to its destination, and every vacuum line from source to service. The final sheet in the garage print set.

D15B — Electrical & Vacuum Schematic Wiring Vacuum
P08 ECUA / B / D plugsSHOCK-TOWER PLUGSfirewall junctionINJECTORS ×4via resistor box — A1/A2/A3/A5DISTRIBUTOR 8-PINCYP/TDC/CKP — B11–B16VTEC SPOOL VALVEsolenoid A4 · switch D6HEATED O2 SENSORsignal D14 · heater A6ECT · TPS · MAP · IATD-plug analog inputsHARNESS ROUTE — KICK PANEL → FIREWALL → SHOCK TOWERG101 MAIN GROUND — THERMOSTAT HOUSING STUDVACUUM MAP — ALL LINES FROM INTAKE MANIFOLDINTAKE MANIFOLDD15B P08MAP SENSORthrottle body portFUEL PRESSURE REG.3.5 mm signal lineEVAP PURGE VALVEcanister → manifoldPCV VALVEvalve cover → manifoldBRAKE BOOSTER10 mm + check valveCHECK VALVE ARROW POINTS TOWARD BOOSTER — TEST: BLOW TOWARD BOOSTER ONLY

Golden Rule

Clean G101 at the thermostat housing before diagnosing anything. Half of all D15B electrical gremlins are that one ground.

Vacuum Rule

Replace hoses one at a time against the under-hood label. A 1 mm leak at the FPR line raises fuel pressure and washes the rings.

Cross-Reference

Pin-level detail lives on the P08 Pinout Card; live diagnosis starts at the Fault-Code Decoder on Specs/Guides.

SCHEMATIC IS SIMPLIFIED FOR BENCH USE. WIRE COLORS AND PIN NUMBERS REFERENCE THE STANDARD OBD-1 LOOM — VERIFY AGAINST THE P08 PINOUT CHART.