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DTC P17AC: Transfer Shift Motor Limit Switch Circuit [09/2015 - ]: Description

When the transfer shift actuator assembly is switching between high (H4) and low (L4), the HL1, HL2 and HL3 terminals are in one of the ON/OFF combinations listed in the table below.

Terminal Mode
HIGH (H4) Switching LOW (L4)
HL1 ON ON ←→ OFF ←→ OFF OFF
HL2 OFF OFF OFF ON ON
HL3 OFF ON ON ON OFF

A malfunction is detected depending on the combination of the 3 circuits that make up the high-low transfer limit switch.

DTC No. DTC Detection Condition
  1. Diagnosis Condition
  2. Malfunction Status
  3. Malfunction Time
  4. Other
 Trouble Area
P17AC
  1. When switching between high and low (high-low transfer shift motor operating) while engine switch turned on (IG) or directly after engine switch is turned on (IG)
  2. The combination of HL1, HL2 and HL3 does not match
  3. 0.05 seconds or more (if directly after engine switch is turned on (IG), 1 second or more)
  4. 1 trip detection logic
  • Wire harness and connector
  • 4 wheel drive control ECU
  • Transfer shift actuator assembly
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