Test Requirements

• the engine control module fuses OK
• Battery voltage at least 12.5 volts
• All electrical consumers switched off
• Vehicles with automatic transmission, shift selector lever in park or neutral
• A/C switched off
• Ground connections between engine/transmission/chassis OK
• Switch the ignition Off.

Start diagnosis

-- Remove the Terminal 30 Power Supply Relay -J317-.

Checking the supply voltage

-- Switch the ignition On.

-- Using a multimeter, measure the voltage of the Terminal 30 Power Supply Relay -J317- circuit (socket 30).

Specified value: battery voltage.

-- Switch the ignition Off.

If the specified value was not obtained:

-- Check the power supply circuit to the Power Supply Relay (terminal 30) -J317- for an open circuit or a short circuit.

-- Check the wiring connections for damage, corrosion, loose or broken terminals.

-- Repair as necessary.

If the specified value was obtained:

-- Switch the ignition On.

-- Using a multimeter, measure the voltage of the Power Supply Relay (terminal 30) -J317- ignition circuit (socket 86).

Specified value: battery voltage.

-- Turn the ignition switch OFF

If the specified value was obtained:

-- Replace the Power Supply Relay (terminal 30) -J317-.

If the specified value was not obtained: