1. Place the gear selector in the PARK position.
2. Turn the ignition switch to START.
3. Observe the SECURITY indicator.

Does the indicator stay on or flash continuously?

--

Go to Step 14

Go to Step 2

Check the START circuit breaker in the underhood junction block.

Is the circuit breaker open?

--

Go to Step 3

Go to Step 4

Repair short to ground on CKT 6 (PPL) circuit breaker or, START1/START2 relay contacts circuit within the underhood junction block.

Replace circuit breaker.

Is the circuit repair complete?

--

Go to Step 36

--

1. Check the battery and battery cables.
2. Perform the battery load test. Refer to Battery Load Test .

Are the battery and battery cables OK?

--

Go to Step 6

Go to Step 5

Replace the battery or battery cable. Refer to Battery Replacement or Battery Cable .

Is the replacement complete?

--

Go to Step 36

--

1. Remove the INJR1 and INJR2 fuses from the underhood junction block to prevent the engine from starting.
2. Using a DMM, measure the voltage from the starter solenoid terminal S to ground while key in start position.

Is the voltage above the specified value?

8 Volts

Go to Step 7

Go to Step 8

1. Check that the starter lead connection at the starter solenoid terminal S is clean and tight.
2. If OK, replace the starter. Refer to Starter Motor Replacement .

Is the replacement complete?

--

Go to Step 36

--

1. Remove the underhood junction block.
2. Use a DMM in order to measure the voltage from the underhood junction block connector C3 terminal F3 to S terminal on starter.
3. Turn the ignition switch to the START position.

Is the measured voltage greater than the specified value?

8 Volts

Go to Step 9

Go to Step 10

Repair open or high resistance in CKT 6 (PPL).

Is the circuit repair complete?

--

Go to Step 36

--

1. Turn the ignition switch OFF.
2. Reconnect the CKT 6 (PPL) lead to the starter solenoid S terminal.
3. Remove the START1 and START2 relays from the underhood junction block.
4. Connect a test lamp between the underhood junction block connector C3 terminal E3 and ground.
5. Make sure the gear selector is in PARK.
6. Turn the ignition switch to START.

Does the test lamp light?

--

Go to Step 11

Go to Step 23

1. Turn the ignition OFF.
2. Connect a DMM set to DC volts scale between the underhood junction block connector C2 terminal A2 and battery positive voltage (B+).
3. Turn the ignition switch to START.

Is the measured voltage in the specified range while the ignition is in START?

10-15V

Go to Step 16

Go to Step 12

1. Connect a scan tool to the data link connector (DLC).
2. Turn the ignition switch to ON.
3. Attempt to establish communication with the PASS-Key® III theft deterrent module (VTD).

Does the scan tool communicate with the module?

--

Go to Step 13

Go to Step 14

1. Using the scan tool, select the PASS-Key® III theft deterrent module (VTD).
2. Select the data menu and monitor the Starter Relay Status output, as displayed on the scan tool.
3. Turn the ignition switch from ON to START, the back to ON.

Does the Starter Relay Status output on the scan tool change from OFF to ON and back?

--

Go to Step 15

Go to Step 14

Diagnose the PASS-Key® III theft deterrent system. Refer to the Theft Deterrent System Check in Theft Deterrent System.

Is the repair complete?

--

Go to Step 36

--

1. Check the PASS-Key® III theft deterrent module connector for poor terminal contact.
2. If OK, repair open or short to ground on CKT 625 (YEL/BLK).
3. Install the START1 and START2 relays back in the underhood junction block.

Is the circuit repair complete?

--

Go to Step 36

--

1. Turn the ignition switch OFF.
2. Install the original START1 relay in the underhood junction block.
3. Replace the START2 relay with a known good relay having the same part number.
4. Turn the ignition switch to START.

Does the starter crank engine?

--

Go to Step 17

Go to Step 18

1. Check START2 relay socket for poor terminal contact.
2. If OK, the START2 relay (replaced in the previous step) is faulty.

Is the replacement complete?

--

Go to Step 36

--

1. Turn the ignition switch OFF.
2. Install the original START2 relay in the underhood junction block.
3. Replace the START1 relay with a known good relay having the same part number.
4. Turn the ignition switch to START.

Does the solenoid click?

--

Go to Step 19

Go to Step 20

1. Check START1 relay socket for poor terminal contact.
2. If OK, the START1 relay (replaced in the previous step) is faulty.

Is the replacement complete?

--

Go to Step 36

--

Using a DMM, check the underhood junction block input terminal voltage.

Is the measured voltage in the specified range?

10-15V

Go to Step 22

Go to Step 21

Repair open or short to ground on the CKT 1 cables to the underhood junction block.

Is the circuit repair complete?

--

Go to Step 36

--

1. Make sure the cable connections to the underhood junction block input terminal are clean and tight.
2. If OK, replace the underhood junction block. Refer to Underhood Fuse Block Replacement .

Is the replacement complete?

--

Go to Step 36

--

1. Turn the ignition switch OFF.
2. Install the START1 and START2 relays (removed in Step 10) back in the underhood junction block.
3. Check the IGN SW fuse in the rear junction block.

Is the fuse open?

--

Go to Step 24

Go to Step 25

1. Repair short to ground on CKT 540 (fuse blow upon installation)
2. Repair short to ground on CKT 540 or 269. (fuse blows when key turn to start).

Is the circuit repair complete?

--

Go to Step 36

--

1. Connect a scan tool to the data link connector (DLC).
2. Turn the ignition switch ON.
3. Attempt to establish communication with the dash integration module (DIM).

Does the scan tool communicate with the module?

--

Go to Step 26

Go to Step 27

1. Using the scan tool, select the dash integration module (DIM).
2. Select the data inputs menu.
3. Monitor the Ignition Crank input, as displayed on the scan tool.
4. Turn the ignition switch to START.

Does the Ignition Crank input, displayed on the scan tool, turn on and off?

--

Go to Step 29

Go to Step 27

1. Turn the ignition switch OFF.
2. Disconnect the ignition switch connectors C1 and C2.
3. Connect a test lamp from ignition switch connector C2 terminal A to ground.

Does the test lamp light?

--

Go to Step 29

Go to Step 28

Repair open CKT 540 (ORN).

Is the circuit repair complete?

--

Go to Step 36

--

1. Turn the ignition switch OFF.
2. If disconnected, reconnect the ignition switch connectors.
3. Disconnect the park/neutral position (PNP) switch connector C1.
4. Connect a DMM set to DC volts scale from PNP switch connector C1 terminal G to ground.
5. Turn the ignition switch to START.

Is the measured voltage in the specified range?

10-15V

Go to Step 30

Go to Step 33

1. Turn the ignition switch OFF.
2. Connect a fused jumper across PNP switch connector C1 terminals G and E.
3. Connect a DMM set to DC volts scale from underhood junction block connector C3 terminal E3 to ground.
4. Turn the ignition switch to START.

Is the measured voltage in the specified range?

10-15V

Go to Step 32

Go to Step 31

Repair open or short to ground on CKT 269 (YEL).

Is the circuit repair complete?

--

Go to Step 36

--

1. Check park/neutral position (PNP) switch connector C1 for poor terminal contact.
2. If OK, replace the PNP switch. Refer to Park/Neutral Position Switch Replacement in Automatic Transaxle - 4T80-E.

Is the replacement complete?

--

Go to Step 36

--

1. Turn the ignition switch OFF.
2. Disconnect the ignition switch connectors.
3. Connect a DMM set to DC volts scale between the park/neutral position (PNP) switch connector C1 terminal G and ground.
4. Momentarily connect a fused jumper across ignition switch connector C2 terminals A and B.

Is the measured voltage in the specified range?

10-15V

Go to Step 35

Go to Step 34

Repair open or short to ground on CKT 5 (YEL).

Is the circuit repair complete?

--

Go to Step 36

--

1. Check ignition switch connectors for poor terminal contact.
2. If OK, replace the ignition switch. Refer to Ignition and Start Switch Replacement in Instrument Panel, Gauges, and Console.

Is the replacement complete?

--

Go to Step 36

--

1. Make sure any components removed during diagnosis are installed in place and that all connectors are connected.
2. Repeat the system check. Refer to Starting System Check .

Is the system check complete?

--

System OK

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