Pinpoint Test E: No Power in START

Steering Column Switches

Pinpoint Test E: No Power in START - Hybrid

Refer to Wiring Diagram Set 13, Power Distribution/SJB for schematic and connector information. [1][2]Diagrams By Number

Normal Operation

When the ignition switch is placed in the START position, fused ignition voltage is sent to the Smart Junction Box (SJB) through circuit CDC35 (BU/WH).

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Ignition switch

- SJB (Smart Junction Box)

PINPOINT TEST E : NO POWER IN START - HYBRID

E1 CHECK FOR VOLTAGE TO SJB (Smart Junction Box) FUSE 28 (5A)

- Disconnect: SJB (Smart Junction Box) Fuse 28 (5A).

- With the ignition in the START position, measure the voltage between SJB (Smart Junction Box) fuse 28 (5A), circuit CDC35 (BU/WH), input side and ground.





Is the voltage greater than 10 volts?

Yes
GO to E4.

No
GO to E2.

E2 CHECK THE IGNITION START CIRCUIT FOR AN OPEN

- Ignition OFF.

- Disconnect: Ignition Switch C250.

- Measure the resistance between SJB (Smart Junction Box) fuse 28 (5A), circuit CDC35 (BU/WH), input side and ignition switch C250-7, circuit CDC35 (BU/WH), harness side.





Is the resistance less than 5 ohms?

Yes
GO to E3.

No
REPAIR circuit CDC35 (BU/WH). TEST the system for normal operation.

E3 CHECK THE IGNITION START CIRCUIT FOR A SHORT TO GROUND

- Measure the resistance between ignition switch C250-7, circuit CDC35 (BU/WH), harness side and ground.





Is the resistance greater than 10,000 ohms?

Yes
INSTALL a new ignition switch. REFER to Ignition Switch . TEST the system for normal operation.

No
REPAIR circuit CDC35 (BU/WH). TEST the system for normal operation.

E4 CHECK FOR CORRECT SJB (Smart Junction Box) OPERATION

- Disconnect: All SJB (Smart Junction Box) connectors.

- Check all SJB (Smart Junction Box) connectors for:
- corrosion.
- pushed-out pins.
- spread terminals.


- Connect: All SJB (Smart Junction Box) connectors making sure that all connectors are seated correctly.

- Operate the system and verify the concern is still present.

Is the concern still present?

Yes
INSTALL a new SJB (Smart Junction Box). TEST the system for normal operation.

No
The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector.