Honda Engine Shuts Off, But Power Mode Stays in ‘On’ or ‘Accessory’ – UnderhoodService

Honda Engine Shuts Off, But Power Mode Stays in ‘On’ or ‘Accessory’

Models: Honda models with one-push start.

Problem: When your customer shifts into Park and shuts off the engine, does the power mode stay in ON or ACCESSORY? The culprit could be a misadjusted shift cable. If it’s not adjusted correctly, it puts pressure on the shift lever, keeping the park pin switch from opening. The power control unit needs the park pin switch position input to switch the power mode to VEHICLE OFF (LOCK).

Solution: To find and fix this problem, hook up a scan tool and look at the data list for the “ONE-PUSH START/PCU” and the transmission gear position called “AT SHIFT POSITION.”

Shift into Park while keeping your foot on the brake pedal. Then, without pressing the release button, pull back on the shift lever (toward Reverse). The AT SHIFT POSITION P signal should read ON, and the AT SHIFT POSITION P-PIN signal should read OFF.

Another test is to shift into Reverse while pressing the brake pedal. Then, press the release button and gently push the shift lever into Park. When it goes into Park, the AT SHIFT POSTION P signal should then read ON and the AT SHIFT POSITION P-PIN signal should read OFF.

If you don’t get the expected results from either of those tests, refer to the service manual and adjust the shift cable.

Courtesy of American Honda Motor Company

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