Service Procedure
1998-2000 modelsNOTE:
Please refer to the appropriate workshop manual for the correct diagnosing procedure and/or follow the service procedures outlined in this bulletin for the vehicle being serviced.
1. Inspect main ground points (refer to SB99-04-S001 for more information).
^ P6 ground point-body [on the passenger side of engine compartment, between the battery and cruise control actuator (if equipped)]. (Figure 1)
^ P10 ground point-engine (at the alternator bracket). (Figure 2)
NOTE:
The 1998, 1999 or 2000 Rodeo / Amigo Electrical Troubleshooting Manual can assist in locating the vehicle ground distribution (i.e. ground contact points).
^ Perform a voltage drop test at the main ground points.
^ If the voltage drop test fails, then inspect and clean both the bolt and contact point.
^ Verify and correct idle settings (if needed) as described in the workshop manual.
^ If the repair procedure on this step solves the high idle condition, then return the vehicle to the customer. If the repair procedure on this step does not solve the high idle condition, then go to step 2 (16 pin Blue Connector).
A. Locate P-6/P10 ground in the engine compartment.
B. Remove P-6/P-10 ground terminal and bolt for ground contact inspection.
^ Inspect ground contact area for corrosion.
^ Inspect bolt and thread for damage or corrosion.
^ Clean the ground area and fastening bolt thoroughly with a wire brush.
^ Replace bolt if damaged or heavily corroded.
C. Install the P-6/P-10 ground terminal and bolt (tighten using hand tools only).
^ Torque the P-6/P-10 ground terminal bolt to (14 Nm) 10 lb.ft.
IMPORTANT:
Do not use air/power tools when tightening. Over-tightening may occur. Use only hand tools and torque the bolt by hand. Do not over-tighten or under-tighten the bolt.
1998-1999 models only:
2. Inspect the 16 pin blue connector, located under the power steering fluid reservoir for corrosion, bent, or damaged pins (specifically for the Throttle Position Sensor). (Figure 3)
A. Disconnect the H-6 connector (16 pin blue connector) and clean with LOCTITE(R)/Permatex - Electrical Contact Cleaner or equivalent (p/n 24379 available at your local store).
IMPORTANT:
Do not use "Brake Cleaner or Carb Cleaner."
NOTE:
If the repair procedure on this step solves the high idle condition, return the vehicle to the customer. If the repair procedure on this step does not solve the high idle condition, then go to step 3 (POWERSTEERING PRESSURE SWITCH).
3. Inspect the power steering pressure switch as described in the appropriate workshop manual and/or follow the preceding steps.
NOTE:
The power steering pressure switch fault can be diagnosed with high idle condition when in neutral with the idle speed at approximately 1200 RPM.
A. Disconnect the power steering pressure switch at the power steering pump and if the idle drops, then the switch was grounded. Or use Tech 2 to run a status check on the power steering pressure switch. If the switch was not grounded, then go to step 4. If the switch was grounded, then proceed:
^ FOR 1998 models, replace the power steering pressure switch.
^ FOR 1999 models, remove the power steering pressure switch and clean with brake cleaner and screw driver (or equivalent tool) to scrape off all the debris causing the switch to short. (Figures 4 & 5)
^ Flush the power steering system to remove any foreign material, after the power steering pressure switch has been reinstalled.
NOTE:
If the repair procedure on this step solves the high idle condition, return the vehicle to the customer. If the repair procedure described on this step does not solve the high idle condition, then go to step 4 (INLET MANIFOLD GASKET).
4. Refer to TSB SB00-01-S005 and/or inspect the inlet manifold gasket for any leaks and replace the inlet manifold gasket as needed on all 1998-1999 Rodeo, V6 models prior to engine breakpoint: 845194. Please perform VIN verification prior to performing any repairs to eliminate potential invalid VIN, cancellation of vehicle warranty coverage, verification of any open campaign circumstances and duplication of previous repair.
NOTE:
A leaking and/or cracked inlet manifold gasket may turn the MIL light ON, and/or a vacuum leak noise may be heard, which may lead to high/intermittent rough idle.
A. Remove the Common Chamber Assembly as described in the Workshop Manual.
IMPORTANT:
Remove the Common Chamber as one piece (separation of upper and lower chamber is not required).
B. Disconnect the EGR valve pipe and EGR valve harness.
NOTE:
By disconnecting the EGR valve pipe from the EGR valve, removal of the EGR valve can be eliminated.
C. Carefully remove both old inlet manifold gaskets and clean the surfaces thoroughly with a plastic gasket scrapper or any equivalent tool (making sure that all the old gasket material has been removed).
IMPORTANT:
Do not use surface conditioning discs when cleaning engine gasket sealing surfaces and/or cleaning engine parts. Please refer to IB00-14-S001 for more information.
D. Install the new inlet manifold gaskets and the common chamber assembly.
NOTE:
If the repair procedure on this step solves the high idle condition, then return the vehicle to the customer. If the repair procedures on this step does not solve the high idle condition, then PCM reprogramming may be required. Proceed to PCM Reprogramming in this bulletin.
PCM REPROGRAMMING (1999
Rodeo with A/T, LEV California
models only)
1. Refer to TSB SB00-03-S001 and/or follow the Driveability/Emissions Manual troubleshooting procedure in the appropriate workshop manual and use the TECH 2 scan tool to read the current PCM Calibration number and Broadcast code. Refer to the ITCS for the updated calibration.
2. Refer to Chart A for the correct Calibration number. Then refer to the ITCS for the Service Programming Procedure. All SPS procedures are outlined in the ITCS.