54Da-DTC P1998: Shift sensor (sub) short to power supply

DTC P1998: Shift sensor(sub) circuit high

caution

Before replacing the ECU, ensure that the communication circuit is normal.

DTC SET CONDITIONS

The PHEV-ECU sets this DTC when the sub signal circuit in the shift sensor fails.

PROBABLE CAUSES

DIAGNOSIS

Required Special Tools

STEP 1. Using scan tool (M.U.T.-IIISE), check the data list. <PHEV-ECU>

Check that the following data list display contents are normal (Refer to

Data list

Check condition	Normal condition
The selector lever is at the R position with the power supply mode of the electric motor switch turned on.	3.7 - 4.2 V
The selector lever is at the H (home)/N position with the power supply mode of the electric motor switch turned on.	2.3 - 2.7V
The selector lever is at the D/B position with the power supply mode of the electric motor switch turned on.	0.79 - 1.29 V

Is the check result normal?

Go to Step 4

Go to Step 2

STEP 2. Check of short to power supply circuit in the signal line (Selector lever assembly and PHEV-ECU).

Check the wiring harness selector lever assembly connector (terminals No.10, No.3) and PHEV-ECU connector (terminals SFVS, SFSS).

Is the check result normal?

Go to Step 3

Repair the connector or wiring harness.

STEP 3. Selector lever assembly check.

Refer to GROUP 22A - Selector Lever Assembly Check

Is the check result normal?

Go to Step 4

Replace the selector lever assembly (Refer to GROUP 22A - Selector Lever Assembly

STEP 4. Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.

Recheck the DTC.

(1) Erase the DTC.

(2) Turn off the power supply mode of the electric motor switch.

(3) Turn on the power supply mode of the electric motor switch.

(4) Check the DTC.

Is the DTC set?

Replace the PHEV-ECU (Refer to

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction