6-Pin Diagnostic & Throttle Body Wire Harness Connector – Female OEM

This 6-pin female connector is a dual-application connector used in OBD diagnostic port harnesses and electronic throttle body (ETB) harnesses. The 6-pin configuration serves both applications: the OBD diagnostic port variant carries the standard OBD-II diagnostic bus circuits, while the throttle body variant integrates dual throttle position sensors (TPS1 and TPS2) and throttle motor control circuits. Available bare or with 15cm pre-wired leads.

Key Specifications

• Pin count: 6-pin
• Gender: Female
• Housing material: High-temp nylon (PA66)
• Available as: Bare connector or 15cm pre-wired leads
• Application: OBD diagnostic port harness / Electronic throttle body harness

Application 1: OBD Diagnostic Port Circuit Assignment

• Pin 1: OBD-II Pin 6 — CAN High (ISO 15765-4)
• Pin 2: OBD-II Pin 14 — CAN Low (ISO 15765-4)
• Pin 3: OBD-II Pin 7 — K-Line (ISO 9141-2 / KWP2000)
• Pin 4: OBD-II Pin 15 — L-Line (ISO 9141-2)
• Pin 5: OBD-II Pin 16 — Battery positive (12V)
• Pin 6: OBD-II Pin 4/5 — Chassis / signal ground

Application 2: Electronic Throttle Body Circuit Assignment

• Pin 1 (TPS1): Throttle position sensor 1 signal
• Pin 2 (TPS2): Throttle position sensor 2 signal (redundant, safety-critical)
• Pin 3 (VREF): 5V sensor reference voltage
• Pin 4 (GND): Sensor ground
• Pin 5 (MTR+): Throttle motor positive
• Pin 6 (MTR−): Throttle motor negative

Electronic Throttle Body – Why Dual TPS?

Electronic throttle bodies use two independent throttle position sensors (TPS1 and TPS2) for safety redundancy. The ECU compares the two sensor signals in real time — if they diverge by more than a calibrated threshold, the ECU detects a sensor fault and activates limp mode (typically limiting throttle to 10–15% opening). This prevents uncontrolled throttle opening from a single sensor failure. A corroded TPS signal pin causes the two sensor readings to diverge, triggering limp mode even when the throttle body itself is functioning correctly.

Fault Codes This Connector Fixes

• P0120–P0124: Throttle Position Sensor A Circuit Faults
• P0220–P0224: Throttle Position Sensor B Circuit Faults
• P2101: Throttle Actuator Control Motor Circuit Range/Performance
• P2104: Throttle Actuator Control System — Forced Idle
• P2135: Throttle/Pedal Position Sensor A/B Voltage Correlation
• P2119: Throttle Actuator Control Throttle Body Range/Performance

Frequently Asked Questions

Q: My car goes into limp mode with P2135 — is this the connector?
A: P2135 (TPS A/B voltage correlation) is almost always caused by a connector fault rather than a failed throttle body. A corroded TPS signal pin causes the two sensor readings to diverge, triggering P2135 and limp mode. Clean the connector pins with electrical contact cleaner and re-test before replacing the throttle body ($150–$400).

Q: Are terminals included?
A: Yes, terminals are included with all variants.