DTC P1676 - '02-04 Models: FPTDR Signal Line Failure

Reset the PCM (see HOW TO RESET THE PCM ).
Start the engine, and wait 10 seconds.
Is DTC P1676 indicated?
1. YES: Go to step 3.
2. NO: Intermittent failure system is OK at this time. Check for poor connections or loose terminals at the ABS/TCS control unit and the PCM.
Turn the ignition switch OFF.
Disconnect PCM connector E (20P) and the ABS/TCS control unit 16P connector.
Check for continuity between body ground and PCM connector terminal E16.

Fig 1: Checking For Continuity Between Body Ground & PCM Connector Terminal E16
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?
1. YES: Repair short in the wire between the ABS/TCS control unit and the PCM (E16).
2. NO: Go to step 6.
Check for continuity between ABS/TCS control unit 16P connector terminal No. 1 and PCM connector terminal E16.

Fig 2: Checking For Continuity Between ABS/TCS Control Unit 16P Connector Terminal No. 1 & PCM Connector Terminal E16
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?
1. YES: Go to step 7.
2. NO: Repair open in the wire between the ABS/TCS control unit and the PCM (E16).
Reconnect PCM connector E (20P).
Connect PCM connector terminals E16 and C28 with a jumper wire.

Fig 3: Connecting PCM Connector Terminals E16 & C28 With A Jumper Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Reset the PCM (see HOW TO RESET THE PCM ).
Start the engine, and wait 60 seconds.
Is DTC P1676 indicated?
1. YES: Substitute a known-good ABS/TCS control unit and recheck. If the symptom/indication goes away, replace the original ABS/TCS control unit.
2. NO: Substitute a known-good PCM and recheck (see HOW TO SUBSTITUTE THE PCM FOR TESTING PURPOSE ). If the symptom/indication goes away, replace the original PCM.