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With Full Assist at All Times

SPEED SENSITIVE POWER STEERING SYSTEM OPERATING DIAGNOSIS - WITH FULL ASSIST AT ALL TIMES

Step Action Value (s) Yes No
1 Perform an initial inspection of the power steering system.
Is the system operational?		 - Go to Step 2 Go to Power Steering System Description 
2 Check the speedometer.
Is the speedometer inoperative?		 - Go to SPEEDOMETER DIAGNOSIS Go to Step 3 (2006) or Step 4 (2007)
3 Check the diagnostic trouble codes at the engine control module (ECM).
Is the ECM code 24 set?		 - Go to SPEEDOMETER DIAGNOSIS Go to Step 4
4
  1. Turn the ignition ON.
  2. Disconnect the Electronic Variable Orifice (EVO) solenoid actuator electrical connector at the power steering pump.
  3. Probe terminal 1 of the EVO actuator connector with a voltmeter. Check the resistance between terminal 1 of actuator and terminal 2 of SSPS module.

Does the voltmeter display the specified value?		 0 Ω Go to Step 6 Go to Step 5
5 Repair the open or short in the circuit between terminal 1 of the EVO solenoid actuator electrical connector and terminal 2 on the Speed Sensitive Power Steering (SSPS) control module connector.
Is the repair complete?		 - System OK -
6
  1. Remove the EVO solenoid actuator from the power steering pump.
  2. Turn the actuator upside down to position the pintle.
  3. Stimulate the actuator by connecting it to the battery.

Does the actuator click?		 - Go to Step 8 Go to Step 7
7 Replace the EVO solenoid actuator.
Is the repair complete?		 - System OK -
8
  1. Turn the ignition OFF.
  2. Remove the SSPS control module from the control module bracket.
  3. Disconnect the SSPS control module connector.
  4. Connect a test light from terminal 8 on the SSPS control module connector to the ground.
  5. Turn the ignition ON.

Is the test light ON?		 - Go to Step 14 Go to Step 9
9 Check the ignition fuse.
Is the ignition fuse open?		 - Go to Step 10 Go to Step 11
10 Replace the ignition fuse.
Is the repair complete?		 - System OK -
11 Check for an open or short in the circuit between terminal 8 of the control module connector and the I/P fuse block.
Is the connection faulty?		 - Go to Step 12 Go to Step 13
12 Repair the open or short in the circuit between terminal 8 of the SSPS control module connector and the I/P fuse block.
Is the repair complete?		 - System OK -
13 Repair the power feed to the ignition fuse F2.
Is the repair complete?		 - System OK -
14
  1. Turn the ignition OFF.
  2. Connect a test light from terminal 10 of the SSPS control module connector to B (+).

Is the test light ON?		 - Go to Step 16 Go to Step 15
15 Repair the open in the ground circuit between terminal 10 of the SSPS control module connector and G203.
Is the repair complete?		 - System OK -
16 Check for a short to B (+) or an open in the circuit between terminal 1 of the SSPS control module connector and terminal B of the EVO solenoid actuator connector.
Is the connection faulty?		 - Go to Step 17 Go to Step 18
17 Repair the short to B (+) or an open in the circuit between terminal 1 of the SSPS control module connector and terminal 2 of the EVO solenoid actuator connector.
Is the repair complete?		 - System OK -
18
  1. Disconnect the steering wheel speed sensor.
  2. Turn the ignition ON.
  3. Check for an open, short to ground, short to B (+), or poor terminal contact between terminal 5 of the SSPS control module connector and terminal 1 of the steering wheel speed sensor connector.

Is the connection faulty?		 - Go to Step 19 Go to Step 20
19 Repair the open, short to ground, short to B (+), or poor terminal contact between terminal 5 of the SSPS control module connector and terminal 1 of the steering wheel speed sensor connector.
Is the repair complete?		 - System OK -
20 Check for an open between terminal 3 of the SSPS control module connector and terminal 3 of the steering wheel speed sensor connector.
Is the connection faulty?		 - Go to Step 21 Go to Step 22
21 Repair the open between terminal 3 of the SSPS control module connector and terminal 3 of the steering wheel speed sensor connector.
Is the repair complete?		 - System OK -
22 Check for an open, short to ground, short to B (+), or poor terminal contact between terminal 14 of the SSPS control module connector and terminal 2 of the steering wheel speed sensor connector.
Is the connection faulty?		 - Go to Step 23 Go to Step 24
23 Repair the open, short to ground, short to B (+), or poor terminal contact between terminal 14 of the SSPS control module connector and terminal 2 of the steering wheel speed sensor connector.
Is the repair complete?		 - System OK -
24
  1. Turn the ignition OFF.
  2. Connect the SSPS control module.
  3. Connect the steering wheel speed sensor.
  4. Turn the ignition ON.
  5. Backprobe with a voltmeter from terminal 5 on the control module connector to the ground.
  6. Rotate the steering wheel quickly in both directions.

Does the voltage show an increase and decrease from the specified value?		 3 V Go to Step 25 Go to Step 26
25 Replace the SSPS control module.
Is the repair complete?		 - System OK -
26 Replace the steering wheel speed sensor.
Is the repair complete?		 - System OK -
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